* [patch tree-optimization]: [2 of 3]: Boolify compares & more
@ 2011-07-07 16:08 Kai Tietz
2011-07-08 9:28 ` Richard Guenther
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-07 16:08 UTC (permalink / raw)
To: GCC Patches; +Cc: Richard Guenther
Hello,
This patch - second of series - adds boolification of comparisions in
gimplifier. For this
casts from/to boolean are marked as not-useless. And in fold_unary_loc
casts to non-boolean integral types are preserved.
The hunk in tree-ssa-forwprop.c in combine_cond-expr_cond is not strictly
necessary - as long as fold-const handles 1-bit precision bitwise-expression
with truth-logic - but it has shown to short-cut some expensier folding. So
I kept it within this patch.
The adjusted testcase gcc.dg/uninit-15.c indicates that due
optimization we loose
in this case variables declaration. But this might be to be expected.
In vectorization we have a regression in gcc.dg/vect/vect-cond-3.c
test-case. It's caused
by always having boolean-type on conditions. So vectorizer sees
different types, which
aren't handled by vectorizer right now. Maybe this issue could be
special-cased for
boolean-types in tree-vect-loop, by making operand for used condition
equal to vector-type.
But this is a subject for a different patch and not addressed by this series.
There is a regressions in tree-ssa/vrp47.c, and the fix is addressed
by the 3rd patch of this
series.
Bootstrapped and regression tested for all standard-languages (plus
Ada and Obj-C++) on host x86_64-pc-linux-gnu.
Ok for apply?
Regards,
Kai
ChangeLog
2011-07-07 Kai Tietz <ktietz@redhat.com>
* fold-const.c (fold_unary_loc): Preserve
non-boolean-typed casts.
* gimplify.c (gimple_boolify): Handle boolification
of comparisons.
(gimplify_expr): Boolifiy non aggregate-typed
comparisons.
* tree-cfg.c (verify_gimple_comparison): Check result
type of comparison expression.
* tree-ssa.c (useless_type_conversion_p): Preserve incompatible
casts from/to boolean,
* tree-ssa-forwprop.c (combine_cond_expr_cond): Add simplification
support for one-bit-precision typed X for cases X != 0 and X == 0.
(forward_propagate_comparison): Adjust test of condition
result.
* gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
* gcc.dg/tree-ssa/pr21031.c: Likewise.
* gcc.dg/tree-ssa/pr30978.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
* gcc.dg/binop-xor1.c: Mark it as expected fail.
* gcc.dg/binop-xor3.c: Likewise.
* gcc.dg/uninit-15.c: Adjust reported message.
Index: gcc-head/gcc/fold-const.c
===================================================================
--- gcc-head.orig/gcc/fold-const.c
+++ gcc-head/gcc/fold-const.c
@@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
non-integral type.
Do not fold the result as that would not simplify further, also
folding again results in recursions. */
- if (INTEGRAL_TYPE_P (type))
+ if (TREE_CODE (type) == BOOLEAN_TYPE)
return build2_loc (loc, TREE_CODE (op0), type,
TREE_OPERAND (op0, 0),
TREE_OPERAND (op0, 1));
- else
+ else if (!INTEGRAL_TYPE_P (type))
return build3_loc (loc, COND_EXPR, type, op0,
fold_convert (type, boolean_true_node),
fold_convert (type, boolean_false_node));
Index: gcc-head/gcc/gimplify.c
===================================================================
--- gcc-head.orig/gcc/gimplify.c
+++ gcc-head/gcc/gimplify.c
@@ -2842,18 +2842,23 @@ gimple_boolify (tree expr)
case TRUTH_NOT_EXPR:
TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
- /* FALLTHRU */
- case EQ_EXPR: case NE_EXPR:
- case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
/* These expressions always produce boolean results. */
- TREE_TYPE (expr) = boolean_type_node;
+ if (TREE_CODE (type) != BOOLEAN_TYPE)
+ TREE_TYPE (expr) = boolean_type_node;
return expr;
default:
+ if (COMPARISON_CLASS_P (expr))
+ {
+ /* There expressions always prduce boolean results. */
+ if (TREE_CODE (type) != BOOLEAN_TYPE)
+ TREE_TYPE (expr) = boolean_type_node;
+ return expr;
+ }
/* Other expressions that get here must have boolean values, but
might need to be converted to the appropriate mode. */
- if (type == boolean_type_node)
+ if (TREE_CODE (type) == BOOLEAN_TYPE)
return expr;
return fold_convert_loc (loc, boolean_type_node, expr);
}
@@ -6763,7 +6768,7 @@ gimplify_expr (tree *expr_p, gimple_seq
tree org_type = TREE_TYPE (*expr_p);
*expr_p = gimple_boolify (*expr_p);
- if (org_type != boolean_type_node)
+ if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
{
*expr_p = fold_convert (org_type, *expr_p);
ret = GS_OK;
@@ -7208,7 +7213,7 @@ gimplify_expr (tree *expr_p, gimple_seq
fold_truth_not_expr) happily uses operand type and doesn't
automatically uses boolean_type as result, we need to keep
orignal type. */
- if (org_type != boolean_type_node)
+ if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
{
*expr_p = fold_convert (org_type, *expr_p);
ret = GS_OK;
@@ -7288,7 +7293,19 @@ gimplify_expr (tree *expr_p, gimple_seq
tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
if (!AGGREGATE_TYPE_P (type))
- goto expr_2;
+ {
+ tree org_type = TREE_TYPE (*expr_p);
+ *expr_p = gimple_boolify (*expr_p);
+ if (!useless_type_conversion_p (org_type,
+ TREE_TYPE (*expr_p)))
+ {
+ *expr_p = fold_convert_loc (saved_location,
+ org_type, *expr_p);
+ ret = GS_OK;
+ }
+ else
+ goto expr_2;
+ }
else if (TYPE_MODE (type) != BLKmode)
ret = gimplify_scalar_mode_aggregate_compare (expr_p);
else
Index: gcc-head/gcc/tree-cfg.c
===================================================================
--- gcc-head.orig/gcc/tree-cfg.c
+++ gcc-head/gcc/tree-cfg.c
@@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
&& (!POINTER_TYPE_P (op0_type)
|| !POINTER_TYPE_P (op1_type)
|| TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
- || !INTEGRAL_TYPE_P (type))
+ || !INTEGRAL_TYPE_P (type)
+ || (TREE_CODE (type) != BOOLEAN_TYPE
+ && TYPE_PRECISION (type) != 1))
{
error ("type mismatch in comparison expression");
debug_generic_expr (type);
Index: gcc-head/gcc/tree-ssa.c
===================================================================
--- gcc-head.orig/gcc/tree-ssa.c
+++ gcc-head/gcc/tree-ssa.c
@@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
|| TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
return false;
- /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
- one. */
- if (TREE_CODE (inner_type) != BOOLEAN_TYPE
- && TREE_CODE (outer_type) == BOOLEAN_TYPE
+ /* Preserve conversions to/from BOOLEAN_TYPE if types are not
+ of precision one. */
+ if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
+ != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
&& TYPE_PRECISION (outer_type) != 1)
return false;
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
@@ -11,5 +11,5 @@ f (int i, float j)
/* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
"forwprop1"} } */
-/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
"forwprop1"} } */
+/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
1\);\n[^\n]*if} "forwprop1"} } */
/* { dg-final { cleanup-tree-dump "forwprop?" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
@@ -16,5 +16,5 @@ foo (int a)
return 0;
}
-/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
+/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
/* { dg-final { cleanup-tree-dump "forwprop1" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
@@ -10,5 +10,5 @@ int foo(int a)
return e;
}
-/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
+/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
@@ -2,5 +2,5 @@
/* { dg-options "-O -fdump-tree-fre1-details" } */
int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
-/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
+/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
/* { dg-final { cleanup-tree-dump "fre1" } } */
Index: gcc-head/gcc/tree-ssa-forwprop.c
===================================================================
--- gcc-head.orig/gcc/tree-ssa-forwprop.c
+++ gcc-head/gcc/tree-ssa-forwprop.c
@@ -367,9 +367,61 @@ combine_cond_expr_cond (location_t loc,
gcc_assert (TREE_CODE_CLASS (code) == tcc_comparison);
t = fold_binary_loc (loc, code, type, op0, op1);
+
+ if (!t && INTEGRAL_TYPE_P (TREE_TYPE (op1))
+ && TYPE_PRECISION (TREE_TYPE (op1)) == 1
+ && (code == EQ_EXPR || code == NE_EXPR))
+ {
+ if (TREE_CODE (op1) == INTEGER_CST)
+ {
+ if (integer_onep (op1))
+ {
+ op1 = fold_convert_loc (loc, TREE_TYPE (op1), integer_zero_node);
+ code = (code == NE_EXPR ? EQ_EXPR : NE_EXPR);
+ return combine_cond_expr_cond (loc, code, type, op0, op1,
invariant_only);
+ }
+ if (TREE_CODE_CLASS (TREE_CODE (op0)) == tcc_comparison
+ && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (op0, 0))))
+ {
+ if (code == NE_EXPR)
+ t = op0;
+ else
+ {
+ code = invert_tree_comparison (TREE_CODE (op0), false);
+ if (code != ERROR_MARK)
+ t = fold_build2_loc (loc, code, type,
+ TREE_OPERAND (op0, 0), TREE_OPERAND (op0, 1));
+ }
+ }
+ }
+ else
+ {
+ if (TREE_CODE_CLASS (TREE_CODE (op0)) == tcc_comparison
+ && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (op0, 0))))
+ {
+ enum tree_code opc = invert_tree_comparison (TREE_CODE (op0), false);
+ if (opc != ERROR_MARK)
+ {
+ op0 = fold_build2_loc (loc, opc, TREE_TYPE (op0),
+ TREE_OPERAND (op0, 0), TREE_OPERAND (op0, 1));
+ t = fold_build2_loc (loc, BIT_XOR_EXPR, type, op0, op1);
+ }
+ }
+ else if (TREE_CODE_CLASS (TREE_CODE (op1)) == tcc_comparison
+ && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (op1, 0))))
+ {
+ enum tree_code opc = invert_tree_comparison (TREE_CODE (op1), false);
+ if (opc != ERROR_MARK)
+ {
+ op1 = fold_build2_loc (loc, opc, TREE_TYPE (op1),
+ TREE_OPERAND (op1, 0), TREE_OPERAND (op1, 1));
+ t = fold_build2_loc (loc, BIT_XOR_EXPR, type, op0, op1);
+ }
+ }
+ }
+ }
if (!t)
return NULL_TREE;
-
/* Require that we got a boolean type out if we put one in. */
gcc_assert (TREE_CODE (TREE_TYPE (t)) == TREE_CODE (type));
@@ -1122,13 +1174,11 @@ forward_propagate_comparison (gimple stm
if (!use_stmt)
return false;
- /* Conversion of the condition result to another integral type. */
+ /* Test of the condition result. */
if (is_gimple_assign (use_stmt)
- && (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (use_stmt))
- || TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
- == tcc_comparison
- || gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR)
- && INTEGRAL_TYPE_P (TREE_TYPE (gimple_assign_lhs (use_stmt))))
+ && ((TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
+ == tcc_comparison)
+ || gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR))
{
tree lhs = gimple_assign_lhs (use_stmt);
Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor1.c
+++ gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
@@ -7,8 +7,5 @@ foo (int a, int b, int c)
return ((a && !b && c) || (!a && b && c));
}
-/* We expect to see "<bb N>"; confirm that, so that we know to count
- it in the real test. */
-/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 5 "optimized" } } */
-/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
*-*-* } } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor3.c
+++ gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
@@ -7,8 +7,5 @@ foo (int a, int b)
return ((a && !b) || (!a && b));
}
-/* We expect to see "<bb N>"; confirm that, so that we know to count
- it in the real test. */
-/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 1 "optimized" } } */
-/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
*-*-* } } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/uninit-15.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/uninit-15.c
+++ gcc-head/gcc/testsuite/gcc.dg/uninit-15.c
@@ -18,9 +18,9 @@ foo (int i)
void baz (void);
void
-bar (void)
+bar (void) /* { dg-warning "'j' is used uninitialized" } */
{
int j; /* { dg-message "note: 'j' was declared here" "" { xfail *-*-* } } */
- for (; foo (j); ++j) /* { dg-warning "'j' is used uninitialized" } */
+ for (; foo (j); ++j)
baz ();
}
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-07 16:08 [patch tree-optimization]: [2 of 3]: Boolify compares & more Kai Tietz
@ 2011-07-08 9:28 ` Richard Guenther
2011-07-08 11:35 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Richard Guenther @ 2011-07-08 9:28 UTC (permalink / raw)
To: Kai Tietz; +Cc: GCC Patches
On Thu, Jul 7, 2011 at 6:07 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
> Hello,
>
> This patch - second of series - adds boolification of comparisions in
> gimplifier. For this
> casts from/to boolean are marked as not-useless. And in fold_unary_loc
> casts to non-boolean integral types are preserved.
> The hunk in tree-ssa-forwprop.c in combine_cond-expr_cond is not strictly
> necessary - as long as fold-const handles 1-bit precision bitwise-expression
> with truth-logic - but it has shown to short-cut some expensier folding. So
> I kept it within this patch.
Please split it out. Also ...
>
> The adjusted testcase gcc.dg/uninit-15.c indicates that due
> optimization we loose
> in this case variables declaration. But this might be to be expected.
>
> In vectorization we have a regression in gcc.dg/vect/vect-cond-3.c
> test-case. It's caused
> by always having boolean-type on conditions. So vectorizer sees
> different types, which
> aren't handled by vectorizer right now. Maybe this issue could be
> special-cased for
> boolean-types in tree-vect-loop, by making operand for used condition
> equal to vector-type.
> But this is a subject for a different patch and not addressed by this series.
>
> There is a regressions in tree-ssa/vrp47.c, and the fix is addressed
> by the 3rd patch of this
> series.
>
> Bootstrapped and regression tested for all standard-languages (plus
> Ada and Obj-C++) on host x86_64-pc-linux-gnu.
>
> Ok for apply?
>
> Regards,
> Kai
>
>
> ChangeLog
>
> 2011-07-07 Kai Tietz <ktietz@redhat.com>
>
> * fold-const.c (fold_unary_loc): Preserve
> non-boolean-typed casts.
> * gimplify.c (gimple_boolify): Handle boolification
> of comparisons.
> (gimplify_expr): Boolifiy non aggregate-typed
> comparisons.
> * tree-cfg.c (verify_gimple_comparison): Check result
> type of comparison expression.
> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
> casts from/to boolean,
> * tree-ssa-forwprop.c (combine_cond_expr_cond): Add simplification
> support for one-bit-precision typed X for cases X != 0 and X == 0.
> (forward_propagate_comparison): Adjust test of condition
> result.
>
>
> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
> * gcc.dg/tree-ssa/pr21031.c: Likewise.
> * gcc.dg/tree-ssa/pr30978.c: Likewise.
> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
> * gcc.dg/binop-xor1.c: Mark it as expected fail.
> * gcc.dg/binop-xor3.c: Likewise.
> * gcc.dg/uninit-15.c: Adjust reported message.
>
> Index: gcc-head/gcc/fold-const.c
> ===================================================================
> --- gcc-head.orig/gcc/fold-const.c
> +++ gcc-head/gcc/fold-const.c
> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
> non-integral type.
> Do not fold the result as that would not simplify further, also
> folding again results in recursions. */
> - if (INTEGRAL_TYPE_P (type))
> + if (TREE_CODE (type) == BOOLEAN_TYPE)
> return build2_loc (loc, TREE_CODE (op0), type,
> TREE_OPERAND (op0, 0),
> TREE_OPERAND (op0, 1));
> - else
> + else if (!INTEGRAL_TYPE_P (type))
> return build3_loc (loc, COND_EXPR, type, op0,
> fold_convert (type, boolean_true_node),
> fold_convert (type, boolean_false_node));
> Index: gcc-head/gcc/gimplify.c
> ===================================================================
> --- gcc-head.orig/gcc/gimplify.c
> +++ gcc-head/gcc/gimplify.c
> @@ -2842,18 +2842,23 @@ gimple_boolify (tree expr)
>
> case TRUTH_NOT_EXPR:
> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
> - /* FALLTHRU */
>
> - case EQ_EXPR: case NE_EXPR:
> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
> /* These expressions always produce boolean results. */
> - TREE_TYPE (expr) = boolean_type_node;
> + if (TREE_CODE (type) != BOOLEAN_TYPE)
> + TREE_TYPE (expr) = boolean_type_node;
> return expr;
>
> default:
> + if (COMPARISON_CLASS_P (expr))
> + {
> + /* There expressions always prduce boolean results. */
> + if (TREE_CODE (type) != BOOLEAN_TYPE)
> + TREE_TYPE (expr) = boolean_type_node;
> + return expr;
> + }
> /* Other expressions that get here must have boolean values, but
> might need to be converted to the appropriate mode. */
> - if (type == boolean_type_node)
> + if (TREE_CODE (type) == BOOLEAN_TYPE)
> return expr;
> return fold_convert_loc (loc, boolean_type_node, expr);
> }
> @@ -6763,7 +6768,7 @@ gimplify_expr (tree *expr_p, gimple_seq
> tree org_type = TREE_TYPE (*expr_p);
>
> *expr_p = gimple_boolify (*expr_p);
> - if (org_type != boolean_type_node)
> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
> {
> *expr_p = fold_convert (org_type, *expr_p);
Use fold_convert_loc with saved_location
> ret = GS_OK;
> @@ -7208,7 +7213,7 @@ gimplify_expr (tree *expr_p, gimple_seq
> fold_truth_not_expr) happily uses operand type and doesn't
> automatically uses boolean_type as result, we need to keep
> orignal type. */
> - if (org_type != boolean_type_node)
> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
> {
> *expr_p = fold_convert (org_type, *expr_p);
Likewise. Maybe this fixes the diagnostic regression.
> ret = GS_OK;
> @@ -7288,7 +7293,19 @@ gimplify_expr (tree *expr_p, gimple_seq
> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>
> if (!AGGREGATE_TYPE_P (type))
> - goto expr_2;
> + {
> + tree org_type = TREE_TYPE (*expr_p);
> + *expr_p = gimple_boolify (*expr_p);
> + if (!useless_type_conversion_p (org_type,
> + TREE_TYPE (*expr_p)))
> + {
> + *expr_p = fold_convert_loc (saved_location,
> + org_type, *expr_p);
> + ret = GS_OK;
> + }
> + else
> + goto expr_2;
> + }
> else if (TYPE_MODE (type) != BLKmode)
> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
> else
> Index: gcc-head/gcc/tree-cfg.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-cfg.c
> +++ gcc-head/gcc/tree-cfg.c
> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
> && (!POINTER_TYPE_P (op0_type)
> || !POINTER_TYPE_P (op1_type)
> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
> - || !INTEGRAL_TYPE_P (type))
> + || !INTEGRAL_TYPE_P (type)
> + || (TREE_CODE (type) != BOOLEAN_TYPE
> + && TYPE_PRECISION (type) != 1))
> {
> error ("type mismatch in comparison expression");
> debug_generic_expr (type);
> Index: gcc-head/gcc/tree-ssa.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-ssa.c
> +++ gcc-head/gcc/tree-ssa.c
> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
> return false;
>
> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
> - one. */
> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
> + of precision one. */
> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
> && TYPE_PRECISION (outer_type) != 1)
> return false;
>
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
> @@ -11,5 +11,5 @@ f (int i, float j)
>
> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
> "forwprop1"} } */
> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
> "forwprop1"} } */
> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
> 1\);\n[^\n]*if} "forwprop1"} } */
Hm? Why that?
> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
> @@ -16,5 +16,5 @@ foo (int a)
> return 0;
> }
>
> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
> @@ -10,5 +10,5 @@ int foo(int a)
> return e;
> }
>
> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
> @@ -2,5 +2,5 @@
> /* { dg-options "-O -fdump-tree-fre1-details" } */
>
> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
> /* { dg-final { cleanup-tree-dump "fre1" } } */
> Index: gcc-head/gcc/tree-ssa-forwprop.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
> +++ gcc-head/gcc/tree-ssa-forwprop.c
> @@ -367,9 +367,61 @@ combine_cond_expr_cond (location_t loc,
> gcc_assert (TREE_CODE_CLASS (code) == tcc_comparison);
>
> t = fold_binary_loc (loc, code, type, op0, op1);
> +
> + if (!t && INTEGRAL_TYPE_P (TREE_TYPE (op1))
> + && TYPE_PRECISION (TREE_TYPE (op1)) == 1
> + && (code == EQ_EXPR || code == NE_EXPR))
> + {
> + if (TREE_CODE (op1) == INTEGER_CST)
> + {
> + if (integer_onep (op1))
> + {
> + op1 = fold_convert_loc (loc, TREE_TYPE (op1), integer_zero_node);
> + code = (code == NE_EXPR ? EQ_EXPR : NE_EXPR);
So you change truthvalue !=/== 1 to truthvalue ==/!= 0 and then
recurse ... that doesn't make sense to me and is super-ugly.
What's the testcase that made you add all this code?
> + return combine_cond_expr_cond (loc, code, type, op0, op1,
> invariant_only);
> + }
> + if (TREE_CODE_CLASS (TREE_CODE (op0)) == tcc_comparison
> + && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (op0, 0))))
> + {
> + if (code == NE_EXPR)
> + t = op0;
> + else
> + {
> + code = invert_tree_comparison (TREE_CODE (op0), false);
> + if (code != ERROR_MARK)
> + t = fold_build2_loc (loc, code, type,
> + TREE_OPERAND (op0, 0), TREE_OPERAND (op0, 1));
> + }
> + }
> + }
> + else
> + {
> + if (TREE_CODE_CLASS (TREE_CODE (op0)) == tcc_comparison
> + && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (op0, 0))))
> + {
> + enum tree_code opc = invert_tree_comparison (TREE_CODE (op0), false);
> + if (opc != ERROR_MARK)
> + {
> + op0 = fold_build2_loc (loc, opc, TREE_TYPE (op0),
> + TREE_OPERAND (op0, 0), TREE_OPERAND (op0, 1));
> + t = fold_build2_loc (loc, BIT_XOR_EXPR, type, op0, op1);
> + }
> + }
> + else if (TREE_CODE_CLASS (TREE_CODE (op1)) == tcc_comparison
> + && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (op1, 0))))
> + {
> + enum tree_code opc = invert_tree_comparison (TREE_CODE (op1), false);
> + if (opc != ERROR_MARK)
> + {
> + op1 = fold_build2_loc (loc, opc, TREE_TYPE (op1),
> + TREE_OPERAND (op1, 0), TREE_OPERAND (op1, 1));
> + t = fold_build2_loc (loc, BIT_XOR_EXPR, type, op0, op1);
> + }
> + }
> + }
> + }
> if (!t)
> return NULL_TREE;
> -
> /* Require that we got a boolean type out if we put one in. */
> gcc_assert (TREE_CODE (TREE_TYPE (t)) == TREE_CODE (type));
>
> @@ -1122,13 +1174,11 @@ forward_propagate_comparison (gimple stm
> if (!use_stmt)
> return false;
>
> - /* Conversion of the condition result to another integral type. */
> + /* Test of the condition result. */
> if (is_gimple_assign (use_stmt)
> - && (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (use_stmt))
> - || TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
> - == tcc_comparison
> - || gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR)
> - && INTEGRAL_TYPE_P (TREE_TYPE (gimple_assign_lhs (use_stmt))))
> + && ((TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
> + == tcc_comparison)
> + || gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR))
> {
> tree lhs = gimple_assign_lhs (use_stmt);
>
> Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor1.c
> +++ gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
> @@ -7,8 +7,5 @@ foo (int a, int b, int c)
> return ((a && !b && c) || (!a && b && c));
> }
>
> -/* We expect to see "<bb N>"; confirm that, so that we know to count
> - it in the real test. */
> -/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 5 "optimized" } } */
> -/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
> +/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
> *-*-* } } } */
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor3.c
> +++ gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
> @@ -7,8 +7,5 @@ foo (int a, int b)
> return ((a && !b) || (!a && b));
> }
>
> -/* We expect to see "<bb N>"; confirm that, so that we know to count
> - it in the real test. */
> -/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 1 "optimized" } } */
> -/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
> +/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
> *-*-* } } } */
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/uninit-15.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/uninit-15.c
> +++ gcc-head/gcc/testsuite/gcc.dg/uninit-15.c
> @@ -18,9 +18,9 @@ foo (int i)
> void baz (void);
>
> void
> -bar (void)
> +bar (void) /* { dg-warning "'j' is used uninitialized" } */
> {
> int j; /* { dg-message "note: 'j' was declared here" "" { xfail *-*-* } } */
> - for (; foo (j); ++j) /* { dg-warning "'j' is used uninitialized" } */
> + for (; foo (j); ++j)
> baz ();
> }
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-08 9:28 ` Richard Guenther
@ 2011-07-08 11:35 ` Kai Tietz
2011-07-08 12:03 ` Richard Guenther
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-08 11:35 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
> On Thu, Jul 7, 2011 at 6:07 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>> Hello,
>>
>> This patch - second of series - adds boolification of comparisions in
>> gimplifier. For this
>> casts from/to boolean are marked as not-useless. And in fold_unary_loc
>> casts to non-boolean integral types are preserved.
>> The hunk in tree-ssa-forwprop.c in combine_cond-expr_cond is not strictly
>> necessary - as long as fold-const handles 1-bit precision bitwise-expression
>> with truth-logic - but it has shown to short-cut some expensier folding. So
>> I kept it within this patch.
>
> Please split it out. Also ...
>
>>
>> The adjusted testcase gcc.dg/uninit-15.c indicates that due
>> optimization we loose
>> in this case variables declaration. But this might be to be expected.
>>
>> In vectorization we have a regression in gcc.dg/vect/vect-cond-3.c
>> test-case. It's caused
>> by always having boolean-type on conditions. So vectorizer sees
>> different types, which
>> aren't handled by vectorizer right now. Maybe this issue could be
>> special-cased for
>> boolean-types in tree-vect-loop, by making operand for used condition
>> equal to vector-type.
>> But this is a subject for a different patch and not addressed by this series.
>>
>> There is a regressions in tree-ssa/vrp47.c, and the fix is addressed
>> by the 3rd patch of this
>> series.
>>
>> Bootstrapped and regression tested for all standard-languages (plus
>> Ada and Obj-C++) on host x86_64-pc-linux-gnu.
>>
>> Ok for apply?
>>
>> Regards,
>> Kai
>>
>>
>> ChangeLog
>>
>> 2011-07-07 Kai Tietz <ktietz@redhat.com>
>>
>> * fold-const.c (fold_unary_loc): Preserve
>> non-boolean-typed casts.
>> * gimplify.c (gimple_boolify): Handle boolification
>> of comparisons.
>> (gimplify_expr): Boolifiy non aggregate-typed
>> comparisons.
>> * tree-cfg.c (verify_gimple_comparison): Check result
>> type of comparison expression.
>> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
>> casts from/to boolean,
>> * tree-ssa-forwprop.c (combine_cond_expr_cond): Add simplification
>> support for one-bit-precision typed X for cases X != 0 and X == 0.
>> (forward_propagate_comparison): Adjust test of condition
>> result.
>>
>>
>> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
>> * gcc.dg/tree-ssa/pr21031.c: Likewise.
>> * gcc.dg/tree-ssa/pr30978.c: Likewise.
>> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
>> * gcc.dg/binop-xor1.c: Mark it as expected fail.
>> * gcc.dg/binop-xor3.c: Likewise.
>> * gcc.dg/uninit-15.c: Adjust reported message.
>>
>> Index: gcc-head/gcc/fold-const.c
>> ===================================================================
>> --- gcc-head.orig/gcc/fold-const.c
>> +++ gcc-head/gcc/fold-const.c
>> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
>> non-integral type.
>> Do not fold the result as that would not simplify further, also
>> folding again results in recursions. */
>> - if (INTEGRAL_TYPE_P (type))
>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>> return build2_loc (loc, TREE_CODE (op0), type,
>> TREE_OPERAND (op0, 0),
>> TREE_OPERAND (op0, 1));
>> - else
>> + else if (!INTEGRAL_TYPE_P (type))
>> return build3_loc (loc, COND_EXPR, type, op0,
>> fold_convert (type, boolean_true_node),
>> fold_convert (type, boolean_false_node));
>> Index: gcc-head/gcc/gimplify.c
>> ===================================================================
>> --- gcc-head.orig/gcc/gimplify.c
>> +++ gcc-head/gcc/gimplify.c
>> @@ -2842,18 +2842,23 @@ gimple_boolify (tree expr)
>>
>> case TRUTH_NOT_EXPR:
>> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
>> - /* FALLTHRU */
>>
>> - case EQ_EXPR: case NE_EXPR:
>> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
>> /* These expressions always produce boolean results. */
>> - TREE_TYPE (expr) = boolean_type_node;
>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>> + TREE_TYPE (expr) = boolean_type_node;
>> return expr;
>>
>> default:
>> + if (COMPARISON_CLASS_P (expr))
>> + {
>> + /* There expressions always prduce boolean results. */
>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>> + TREE_TYPE (expr) = boolean_type_node;
>> + return expr;
>> + }
>> /* Other expressions that get here must have boolean values, but
>> might need to be converted to the appropriate mode. */
>> - if (type == boolean_type_node)
>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>> return expr;
>> return fold_convert_loc (loc, boolean_type_node, expr);
>> }
>> @@ -6763,7 +6768,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>> tree org_type = TREE_TYPE (*expr_p);
>>
>> *expr_p = gimple_boolify (*expr_p);
>> - if (org_type != boolean_type_node)
>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>> {
>> *expr_p = fold_convert (org_type, *expr_p);
>
> Use fold_convert_loc with saved_location
Oh, good catch. Yes, I will adjust that.
>> ret = GS_OK;
>> @@ -7208,7 +7213,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>> fold_truth_not_expr) happily uses operand type and doesn't
>> automatically uses boolean_type as result, we need to keep
>> orignal type. */
>> - if (org_type != boolean_type_node)
>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>> {
>> *expr_p = fold_convert (org_type, *expr_p);
>
> Likewise. Maybe this fixes the diagnostic regression.
>
>> ret = GS_OK;
>> @@ -7288,7 +7293,19 @@ gimplify_expr (tree *expr_p, gimple_seq
>> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>>
>> if (!AGGREGATE_TYPE_P (type))
>> - goto expr_2;
>> + {
>> + tree org_type = TREE_TYPE (*expr_p);
>> + *expr_p = gimple_boolify (*expr_p);
>> + if (!useless_type_conversion_p (org_type,
>> + TREE_TYPE (*expr_p)))
>> + {
>> + *expr_p = fold_convert_loc (saved_location,
>> + org_type, *expr_p);
>> + ret = GS_OK;
>> + }
>> + else
>> + goto expr_2;
>> + }
>> else if (TYPE_MODE (type) != BLKmode)
>> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
>> else
>> Index: gcc-head/gcc/tree-cfg.c
>> ===================================================================
>> --- gcc-head.orig/gcc/tree-cfg.c
>> +++ gcc-head/gcc/tree-cfg.c
>> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
>> && (!POINTER_TYPE_P (op0_type)
>> || !POINTER_TYPE_P (op1_type)
>> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
>> - || !INTEGRAL_TYPE_P (type))
>> + || !INTEGRAL_TYPE_P (type)
>> + || (TREE_CODE (type) != BOOLEAN_TYPE
>> + && TYPE_PRECISION (type) != 1))
>> {
>> error ("type mismatch in comparison expression");
>> debug_generic_expr (type);
>> Index: gcc-head/gcc/tree-ssa.c
>> ===================================================================
>> --- gcc-head.orig/gcc/tree-ssa.c
>> +++ gcc-head/gcc/tree-ssa.c
>> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
>> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
>> return false;
>>
>> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
>> - one. */
>> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
>> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
>> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
>> + of precision one. */
>> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
>> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
>> && TYPE_PRECISION (outer_type) != 1)
>> return false;
>>
>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>> @@ -11,5 +11,5 @@ f (int i, float j)
>>
>> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
>> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
>> "forwprop1"} } */
>> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
>> "forwprop1"} } */
>> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
>> 1\);\n[^\n]*if} "forwprop1"} } */
>
> Hm? Why that?
>
>> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>> @@ -16,5 +16,5 @@ foo (int a)
>> return 0;
>> }
>>
>> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
>> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
>> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>> @@ -10,5 +10,5 @@ int foo(int a)
>> return e;
>> }
>>
>> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
>> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>> @@ -2,5 +2,5 @@
>> /* { dg-options "-O -fdump-tree-fre1-details" } */
>>
>> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
>> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
>> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
>> /* { dg-final { cleanup-tree-dump "fre1" } } */
>> Index: gcc-head/gcc/tree-ssa-forwprop.c
>> ===================================================================
>> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
>> +++ gcc-head/gcc/tree-ssa-forwprop.c
>> @@ -367,9 +367,61 @@ combine_cond_expr_cond (location_t loc,
>> gcc_assert (TREE_CODE_CLASS (code) == tcc_comparison);
>>
>> t = fold_binary_loc (loc, code, type, op0, op1);
>> +
>> + if (!t && INTEGRAL_TYPE_P (TREE_TYPE (op1))
>> + && TYPE_PRECISION (TREE_TYPE (op1)) == 1
>> + && (code == EQ_EXPR || code == NE_EXPR))
>> + {
>> + if (TREE_CODE (op1) == INTEGER_CST)
>> + {
>> + if (integer_onep (op1))
>> + {
>> + op1 = fold_convert_loc (loc, TREE_TYPE (op1), integer_zero_node);
>> + code = (code == NE_EXPR ? EQ_EXPR : NE_EXPR);
>
> So you change truthvalue !=/== 1 to truthvalue ==/!= 0 and then
> recurse ... that doesn't make sense to me and is super-ugly.
> What's the testcase that made you add all this code?
Well, the convert from truthvalue !=/== 1 to !=/== 0 limits the amount
of cases to handle. As for truthvalued X the we have then just to
handle two cases. X != 0 -> X, and X == 0 -> (X ^ 1).
The recursion is someting I saw as existing pattern (for the same
thing) in truth-op folding in fold-const.
Actual I can remove this optimization here, as it should be convered
by VRP already (when VRP handles 1-bit precision bitwise ops proper).
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-08 11:35 ` Kai Tietz
@ 2011-07-08 12:03 ` Richard Guenther
2011-07-11 15:57 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Richard Guenther @ 2011-07-08 12:03 UTC (permalink / raw)
To: Kai Tietz; +Cc: GCC Patches
On Fri, Jul 8, 2011 at 1:32 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>> On Thu, Jul 7, 2011 at 6:07 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>> Hello,
>>>
>>> This patch - second of series - adds boolification of comparisions in
>>> gimplifier. For this
>>> casts from/to boolean are marked as not-useless. And in fold_unary_loc
>>> casts to non-boolean integral types are preserved.
>>> The hunk in tree-ssa-forwprop.c in combine_cond-expr_cond is not strictly
>>> necessary - as long as fold-const handles 1-bit precision bitwise-expression
>>> with truth-logic - but it has shown to short-cut some expensier folding. So
>>> I kept it within this patch.
>>
>> Please split it out. Also ...
>>
>>>
>>> The adjusted testcase gcc.dg/uninit-15.c indicates that due
>>> optimization we loose
>>> in this case variables declaration. But this might be to be expected.
>>>
>>> In vectorization we have a regression in gcc.dg/vect/vect-cond-3.c
>>> test-case. It's caused
>>> by always having boolean-type on conditions. So vectorizer sees
>>> different types, which
>>> aren't handled by vectorizer right now. Maybe this issue could be
>>> special-cased for
>>> boolean-types in tree-vect-loop, by making operand for used condition
>>> equal to vector-type.
>>> But this is a subject for a different patch and not addressed by this series.
>>>
>>> There is a regressions in tree-ssa/vrp47.c, and the fix is addressed
>>> by the 3rd patch of this
>>> series.
>>>
>>> Bootstrapped and regression tested for all standard-languages (plus
>>> Ada and Obj-C++) on host x86_64-pc-linux-gnu.
>>>
>>> Ok for apply?
>>>
>>> Regards,
>>> Kai
>>>
>>>
>>> ChangeLog
>>>
>>> 2011-07-07 Kai Tietz <ktietz@redhat.com>
>>>
>>> * fold-const.c (fold_unary_loc): Preserve
>>> non-boolean-typed casts.
>>> * gimplify.c (gimple_boolify): Handle boolification
>>> of comparisons.
>>> (gimplify_expr): Boolifiy non aggregate-typed
>>> comparisons.
>>> * tree-cfg.c (verify_gimple_comparison): Check result
>>> type of comparison expression.
>>> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
>>> casts from/to boolean,
>>> * tree-ssa-forwprop.c (combine_cond_expr_cond): Add simplification
>>> support for one-bit-precision typed X for cases X != 0 and X == 0.
>>> (forward_propagate_comparison): Adjust test of condition
>>> result.
>>>
>>>
>>> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
>>> * gcc.dg/tree-ssa/pr21031.c: Likewise.
>>> * gcc.dg/tree-ssa/pr30978.c: Likewise.
>>> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
>>> * gcc.dg/binop-xor1.c: Mark it as expected fail.
>>> * gcc.dg/binop-xor3.c: Likewise.
>>> * gcc.dg/uninit-15.c: Adjust reported message.
>>>
>>> Index: gcc-head/gcc/fold-const.c
>>> ===================================================================
>>> --- gcc-head.orig/gcc/fold-const.c
>>> +++ gcc-head/gcc/fold-const.c
>>> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
>>> non-integral type.
>>> Do not fold the result as that would not simplify further, also
>>> folding again results in recursions. */
>>> - if (INTEGRAL_TYPE_P (type))
>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>> return build2_loc (loc, TREE_CODE (op0), type,
>>> TREE_OPERAND (op0, 0),
>>> TREE_OPERAND (op0, 1));
>>> - else
>>> + else if (!INTEGRAL_TYPE_P (type))
>>> return build3_loc (loc, COND_EXPR, type, op0,
>>> fold_convert (type, boolean_true_node),
>>> fold_convert (type, boolean_false_node));
>>> Index: gcc-head/gcc/gimplify.c
>>> ===================================================================
>>> --- gcc-head.orig/gcc/gimplify.c
>>> +++ gcc-head/gcc/gimplify.c
>>> @@ -2842,18 +2842,23 @@ gimple_boolify (tree expr)
>>>
>>> case TRUTH_NOT_EXPR:
>>> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
>>> - /* FALLTHRU */
>>>
>>> - case EQ_EXPR: case NE_EXPR:
>>> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
>>> /* These expressions always produce boolean results. */
>>> - TREE_TYPE (expr) = boolean_type_node;
>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>> + TREE_TYPE (expr) = boolean_type_node;
>>> return expr;
>>>
>>> default:
>>> + if (COMPARISON_CLASS_P (expr))
>>> + {
>>> + /* There expressions always prduce boolean results. */
>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>> + TREE_TYPE (expr) = boolean_type_node;
>>> + return expr;
>>> + }
>>> /* Other expressions that get here must have boolean values, but
>>> might need to be converted to the appropriate mode. */
>>> - if (type == boolean_type_node)
>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>> return expr;
>>> return fold_convert_loc (loc, boolean_type_node, expr);
>>> }
>>> @@ -6763,7 +6768,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>> tree org_type = TREE_TYPE (*expr_p);
>>>
>>> *expr_p = gimple_boolify (*expr_p);
>>> - if (org_type != boolean_type_node)
>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>> {
>>> *expr_p = fold_convert (org_type, *expr_p);
>>
>> Use fold_convert_loc with saved_location
>
> Oh, good catch. Yes, I will adjust that.
>
>>> ret = GS_OK;
>>> @@ -7208,7 +7213,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>> fold_truth_not_expr) happily uses operand type and doesn't
>>> automatically uses boolean_type as result, we need to keep
>>> orignal type. */
>>> - if (org_type != boolean_type_node)
>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>> {
>>> *expr_p = fold_convert (org_type, *expr_p);
>>
>> Likewise. Maybe this fixes the diagnostic regression.
>>
>>> ret = GS_OK;
>>> @@ -7288,7 +7293,19 @@ gimplify_expr (tree *expr_p, gimple_seq
>>> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>>>
>>> if (!AGGREGATE_TYPE_P (type))
>>> - goto expr_2;
>>> + {
>>> + tree org_type = TREE_TYPE (*expr_p);
>>> + *expr_p = gimple_boolify (*expr_p);
>>> + if (!useless_type_conversion_p (org_type,
>>> + TREE_TYPE (*expr_p)))
>>> + {
>>> + *expr_p = fold_convert_loc (saved_location,
>>> + org_type, *expr_p);
>>> + ret = GS_OK;
>>> + }
>>> + else
>>> + goto expr_2;
>>> + }
>>> else if (TYPE_MODE (type) != BLKmode)
>>> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
>>> else
>>> Index: gcc-head/gcc/tree-cfg.c
>>> ===================================================================
>>> --- gcc-head.orig/gcc/tree-cfg.c
>>> +++ gcc-head/gcc/tree-cfg.c
>>> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
>>> && (!POINTER_TYPE_P (op0_type)
>>> || !POINTER_TYPE_P (op1_type)
>>> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
>>> - || !INTEGRAL_TYPE_P (type))
>>> + || !INTEGRAL_TYPE_P (type)
>>> + || (TREE_CODE (type) != BOOLEAN_TYPE
>>> + && TYPE_PRECISION (type) != 1))
>>> {
>>> error ("type mismatch in comparison expression");
>>> debug_generic_expr (type);
>>> Index: gcc-head/gcc/tree-ssa.c
>>> ===================================================================
>>> --- gcc-head.orig/gcc/tree-ssa.c
>>> +++ gcc-head/gcc/tree-ssa.c
>>> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
>>> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
>>> return false;
>>>
>>> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
>>> - one. */
>>> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
>>> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
>>> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
>>> + of precision one. */
>>> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
>>> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
>>> && TYPE_PRECISION (outer_type) != 1)
>>> return false;
>>>
>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>> ===================================================================
>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>> @@ -11,5 +11,5 @@ f (int i, float j)
>>>
>>> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
>>> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
>>> "forwprop1"} } */
>>> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
>>> "forwprop1"} } */
>>> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
>>> 1\);\n[^\n]*if} "forwprop1"} } */
>>
>> Hm? Why that?
>>
>>> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>> ===================================================================
>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>> @@ -16,5 +16,5 @@ foo (int a)
>>> return 0;
>>> }
>>>
>>> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
>>> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
>>> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>> ===================================================================
>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>> @@ -10,5 +10,5 @@ int foo(int a)
>>> return e;
>>> }
>>>
>>> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
>>> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
>>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>> ===================================================================
>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>> @@ -2,5 +2,5 @@
>>> /* { dg-options "-O -fdump-tree-fre1-details" } */
>>>
>>> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
>>> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
>>> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
>>> /* { dg-final { cleanup-tree-dump "fre1" } } */
>>> Index: gcc-head/gcc/tree-ssa-forwprop.c
>>> ===================================================================
>>> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
>>> +++ gcc-head/gcc/tree-ssa-forwprop.c
>>> @@ -367,9 +367,61 @@ combine_cond_expr_cond (location_t loc,
>>> gcc_assert (TREE_CODE_CLASS (code) == tcc_comparison);
>>>
>>> t = fold_binary_loc (loc, code, type, op0, op1);
>>> +
>>> + if (!t && INTEGRAL_TYPE_P (TREE_TYPE (op1))
>>> + && TYPE_PRECISION (TREE_TYPE (op1)) == 1
>>> + && (code == EQ_EXPR || code == NE_EXPR))
>>> + {
>>> + if (TREE_CODE (op1) == INTEGER_CST)
>>> + {
>>> + if (integer_onep (op1))
>>> + {
>>> + op1 = fold_convert_loc (loc, TREE_TYPE (op1), integer_zero_node);
>>> + code = (code == NE_EXPR ? EQ_EXPR : NE_EXPR);
>>
>> So you change truthvalue !=/== 1 to truthvalue ==/!= 0 and then
>> recurse ... that doesn't make sense to me and is super-ugly.
>> What's the testcase that made you add all this code?
>
> Well, the convert from truthvalue !=/== 1 to !=/== 0 limits the amount
> of cases to handle. As for truthvalued X the we have then just to
> handle two cases. X != 0 -> X, and X == 0 -> (X ^ 1).
> The recursion is someting I saw as existing pattern (for the same
> thing) in truth-op folding in fold-const.
>
> Actual I can remove this optimization here, as it should be convered
> by VRP already (when VRP handles 1-bit precision bitwise ops proper).
We should have a canonical form for those compares and change
them accordingly, best in fold_stmt.
Richard.
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-08 12:03 ` Richard Guenther
@ 2011-07-11 15:57 ` Kai Tietz
2011-07-12 9:29 ` Richard Guenther
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-11 15:57 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
> On Fri, Jul 8, 2011 at 1:32 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>>> On Thu, Jul 7, 2011 at 6:07 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>> Hello,
>>>>
>>>> This patch - second of series - adds boolification of comparisions in
>>>> gimplifier. For this
>>>> casts from/to boolean are marked as not-useless. And in fold_unary_loc
>>>> casts to non-boolean integral types are preserved.
>>>> The hunk in tree-ssa-forwprop.c in combine_cond-expr_cond is not strictly
>>>> necessary - as long as fold-const handles 1-bit precision bitwise-expression
>>>> with truth-logic - but it has shown to short-cut some expensier folding. So
>>>> I kept it within this patch.
>>>
>>> Please split it out. Also ...
>>>
>>>>
>>>> The adjusted testcase gcc.dg/uninit-15.c indicates that due
>>>> optimization we loose
>>>> in this case variables declaration. But this might be to be expected.
>>>>
>>>> In vectorization we have a regression in gcc.dg/vect/vect-cond-3.c
>>>> test-case. It's caused
>>>> by always having boolean-type on conditions. So vectorizer sees
>>>> different types, which
>>>> aren't handled by vectorizer right now. Maybe this issue could be
>>>> special-cased for
>>>> boolean-types in tree-vect-loop, by making operand for used condition
>>>> equal to vector-type.
>>>> But this is a subject for a different patch and not addressed by this series.
>>>>
>>>> There is a regressions in tree-ssa/vrp47.c, and the fix is addressed
>>>> by the 3rd patch of this
>>>> series.
>>>>
>>>> Bootstrapped and regression tested for all standard-languages (plus
>>>> Ada and Obj-C++) on host x86_64-pc-linux-gnu.
>>>>
>>>> Ok for apply?
>>>>
>>>> Regards,
>>>> Kai
>>>>
>>>>
>>>> ChangeLog
>>>>
>>>> 2011-07-07 Kai Tietz <ktietz@redhat.com>
>>>>
>>>> * fold-const.c (fold_unary_loc): Preserve
>>>> non-boolean-typed casts.
>>>> * gimplify.c (gimple_boolify): Handle boolification
>>>> of comparisons.
>>>> (gimplify_expr): Boolifiy non aggregate-typed
>>>> comparisons.
>>>> * tree-cfg.c (verify_gimple_comparison): Check result
>>>> type of comparison expression.
>>>> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
>>>> casts from/to boolean,
>>>> * tree-ssa-forwprop.c (combine_cond_expr_cond): Add simplification
>>>> support for one-bit-precision typed X for cases X != 0 and X == 0.
>>>> (forward_propagate_comparison): Adjust test of condition
>>>> result.
>>>>
>>>>
>>>> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
>>>> * gcc.dg/tree-ssa/pr21031.c: Likewise.
>>>> * gcc.dg/tree-ssa/pr30978.c: Likewise.
>>>> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
>>>> * gcc.dg/binop-xor1.c: Mark it as expected fail.
>>>> * gcc.dg/binop-xor3.c: Likewise.
>>>> * gcc.dg/uninit-15.c: Adjust reported message.
>>>>
>>>> Index: gcc-head/gcc/fold-const.c
>>>> ===================================================================
>>>> --- gcc-head.orig/gcc/fold-const.c
>>>> +++ gcc-head/gcc/fold-const.c
>>>> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
>>>> non-integral type.
>>>> Do not fold the result as that would not simplify further, also
>>>> folding again results in recursions. */
>>>> - if (INTEGRAL_TYPE_P (type))
>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>> return build2_loc (loc, TREE_CODE (op0), type,
>>>> TREE_OPERAND (op0, 0),
>>>> TREE_OPERAND (op0, 1));
>>>> - else
>>>> + else if (!INTEGRAL_TYPE_P (type))
>>>> return build3_loc (loc, COND_EXPR, type, op0,
>>>> fold_convert (type, boolean_true_node),
>>>> fold_convert (type, boolean_false_node));
>>>> Index: gcc-head/gcc/gimplify.c
>>>> ===================================================================
>>>> --- gcc-head.orig/gcc/gimplify.c
>>>> +++ gcc-head/gcc/gimplify.c
>>>> @@ -2842,18 +2842,23 @@ gimple_boolify (tree expr)
>>>>
>>>> case TRUTH_NOT_EXPR:
>>>> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
>>>> - /* FALLTHRU */
>>>>
>>>> - case EQ_EXPR: case NE_EXPR:
>>>> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
>>>> /* These expressions always produce boolean results. */
>>>> - TREE_TYPE (expr) = boolean_type_node;
>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>> return expr;
>>>>
>>>> default:
>>>> + if (COMPARISON_CLASS_P (expr))
>>>> + {
>>>> + /* There expressions always prduce boolean results. */
>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>> + return expr;
>>>> + }
>>>> /* Other expressions that get here must have boolean values, but
>>>> might need to be converted to the appropriate mode. */
>>>> - if (type == boolean_type_node)
>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>> return expr;
>>>> return fold_convert_loc (loc, boolean_type_node, expr);
>>>> }
>>>> @@ -6763,7 +6768,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>> tree org_type = TREE_TYPE (*expr_p);
>>>>
>>>> *expr_p = gimple_boolify (*expr_p);
>>>> - if (org_type != boolean_type_node)
>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>> {
>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>
>>> Use fold_convert_loc with saved_location
>>
>> Oh, good catch. Yes, I will adjust that.
>>
>>>> ret = GS_OK;
>>>> @@ -7208,7 +7213,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>> fold_truth_not_expr) happily uses operand type and doesn't
>>>> automatically uses boolean_type as result, we need to keep
>>>> orignal type. */
>>>> - if (org_type != boolean_type_node)
>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>> {
>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>
>>> Likewise. Maybe this fixes the diagnostic regression.
>>>
>>>> ret = GS_OK;
>>>> @@ -7288,7 +7293,19 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>>>>
>>>> if (!AGGREGATE_TYPE_P (type))
>>>> - goto expr_2;
>>>> + {
>>>> + tree org_type = TREE_TYPE (*expr_p);
>>>> + *expr_p = gimple_boolify (*expr_p);
>>>> + if (!useless_type_conversion_p (org_type,
>>>> + TREE_TYPE (*expr_p)))
>>>> + {
>>>> + *expr_p = fold_convert_loc (saved_location,
>>>> + org_type, *expr_p);
>>>> + ret = GS_OK;
>>>> + }
>>>> + else
>>>> + goto expr_2;
>>>> + }
>>>> else if (TYPE_MODE (type) != BLKmode)
>>>> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
>>>> else
>>>> Index: gcc-head/gcc/tree-cfg.c
>>>> ===================================================================
>>>> --- gcc-head.orig/gcc/tree-cfg.c
>>>> +++ gcc-head/gcc/tree-cfg.c
>>>> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
>>>> && (!POINTER_TYPE_P (op0_type)
>>>> || !POINTER_TYPE_P (op1_type)
>>>> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
>>>> - || !INTEGRAL_TYPE_P (type))
>>>> + || !INTEGRAL_TYPE_P (type)
>>>> + || (TREE_CODE (type) != BOOLEAN_TYPE
>>>> + && TYPE_PRECISION (type) != 1))
>>>> {
>>>> error ("type mismatch in comparison expression");
>>>> debug_generic_expr (type);
>>>> Index: gcc-head/gcc/tree-ssa.c
>>>> ===================================================================
>>>> --- gcc-head.orig/gcc/tree-ssa.c
>>>> +++ gcc-head/gcc/tree-ssa.c
>>>> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
>>>> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
>>>> return false;
>>>>
>>>> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
>>>> - one. */
>>>> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
>>>> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
>>>> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
>>>> + of precision one. */
>>>> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
>>>> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
>>>> && TYPE_PRECISION (outer_type) != 1)
>>>> return false;
>>>>
>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>> ===================================================================
>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>> @@ -11,5 +11,5 @@ f (int i, float j)
>>>>
>>>> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
>>>> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
>>>> "forwprop1"} } */
>>>> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
>>>> "forwprop1"} } */
>>>> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
>>>> 1\);\n[^\n]*if} "forwprop1"} } */
>>>
>>> Hm? Why that?
>>>
>>>> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>> ===================================================================
>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>> @@ -16,5 +16,5 @@ foo (int a)
>>>> return 0;
>>>> }
>>>>
>>>> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
>>>> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
>>>> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>> ===================================================================
>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>> @@ -10,5 +10,5 @@ int foo(int a)
>>>> return e;
>>>> }
>>>>
>>>> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
>>>> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
>>>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>> ===================================================================
>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>> @@ -2,5 +2,5 @@
>>>> /* { dg-options "-O -fdump-tree-fre1-details" } */
>>>>
>>>> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
>>>> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
>>>> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
>>>> /* { dg-final { cleanup-tree-dump "fre1" } } */
>>>> Index: gcc-head/gcc/tree-ssa-forwprop.c
>>>> ===================================================================
>>>> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
>>>> +++ gcc-head/gcc/tree-ssa-forwprop.c
>>>> @@ -367,9 +367,61 @@ combine_cond_expr_cond (location_t loc,
>>>> gcc_assert (TREE_CODE_CLASS (code) == tcc_comparison);
>>>>
>>>> t = fold_binary_loc (loc, code, type, op0, op1);
>>>> +
>>>> + if (!t && INTEGRAL_TYPE_P (TREE_TYPE (op1))
>>>> + && TYPE_PRECISION (TREE_TYPE (op1)) == 1
>>>> + && (code == EQ_EXPR || code == NE_EXPR))
>>>> + {
>>>> + if (TREE_CODE (op1) == INTEGER_CST)
>>>> + {
>>>> + if (integer_onep (op1))
>>>> + {
>>>> + op1 = fold_convert_loc (loc, TREE_TYPE (op1), integer_zero_node);
>>>> + code = (code == NE_EXPR ? EQ_EXPR : NE_EXPR);
>>>
>>> So you change truthvalue !=/== 1 to truthvalue ==/!= 0 and then
>>> recurse ... that doesn't make sense to me and is super-ugly.
>>> What's the testcase that made you add all this code?
>>
>> Well, the convert from truthvalue !=/== 1 to !=/== 0 limits the amount
>> of cases to handle. As for truthvalued X the we have then just to
>> handle two cases. X != 0 -> X, and X == 0 -> (X ^ 1).
>> The recursion is someting I saw as existing pattern (for the same
>> thing) in truth-op folding in fold-const.
>>
>> Actual I can remove this optimization here, as it should be convered
>> by VRP already (when VRP handles 1-bit precision bitwise ops proper).
>
> We should have a canonical form for those compares and change
> them accordingly, best in fold_stmt.
>
> Richard.
Hmm, I tried to add this code-pattern to fold_stmt, but for this kind
of branch it seems not to be invoked at all. At least not now without
boolification of compares. One nit I found for GIMPLE_BINARY, as here
just patterns getting replaced, which have fewer number of ops then
original statement. This check looks a bit bogus.
For getting this normalization right now in a consistant way,
fold-const might be right now the better place to handle this.
Regards,
Kai
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-11 15:57 ` Kai Tietz
@ 2011-07-12 9:29 ` Richard Guenther
2011-07-12 10:00 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Richard Guenther @ 2011-07-12 9:29 UTC (permalink / raw)
To: Kai Tietz; +Cc: GCC Patches
On Mon, Jul 11, 2011 at 5:37 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>> On Fri, Jul 8, 2011 at 1:32 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>>>> On Thu, Jul 7, 2011 at 6:07 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>>> Hello,
>>>>>
>>>>> This patch - second of series - adds boolification of comparisions in
>>>>> gimplifier. For this
>>>>> casts from/to boolean are marked as not-useless. And in fold_unary_loc
>>>>> casts to non-boolean integral types are preserved.
>>>>> The hunk in tree-ssa-forwprop.c in combine_cond-expr_cond is not strictly
>>>>> necessary - as long as fold-const handles 1-bit precision bitwise-expression
>>>>> with truth-logic - but it has shown to short-cut some expensier folding. So
>>>>> I kept it within this patch.
>>>>
>>>> Please split it out. Also ...
>>>>
>>>>>
>>>>> The adjusted testcase gcc.dg/uninit-15.c indicates that due
>>>>> optimization we loose
>>>>> in this case variables declaration. But this might be to be expected.
>>>>>
>>>>> In vectorization we have a regression in gcc.dg/vect/vect-cond-3.c
>>>>> test-case. It's caused
>>>>> by always having boolean-type on conditions. So vectorizer sees
>>>>> different types, which
>>>>> aren't handled by vectorizer right now. Maybe this issue could be
>>>>> special-cased for
>>>>> boolean-types in tree-vect-loop, by making operand for used condition
>>>>> equal to vector-type.
>>>>> But this is a subject for a different patch and not addressed by this series.
>>>>>
>>>>> There is a regressions in tree-ssa/vrp47.c, and the fix is addressed
>>>>> by the 3rd patch of this
>>>>> series.
>>>>>
>>>>> Bootstrapped and regression tested for all standard-languages (plus
>>>>> Ada and Obj-C++) on host x86_64-pc-linux-gnu.
>>>>>
>>>>> Ok for apply?
>>>>>
>>>>> Regards,
>>>>> Kai
>>>>>
>>>>>
>>>>> ChangeLog
>>>>>
>>>>> 2011-07-07 Kai Tietz <ktietz@redhat.com>
>>>>>
>>>>> * fold-const.c (fold_unary_loc): Preserve
>>>>> non-boolean-typed casts.
>>>>> * gimplify.c (gimple_boolify): Handle boolification
>>>>> of comparisons.
>>>>> (gimplify_expr): Boolifiy non aggregate-typed
>>>>> comparisons.
>>>>> * tree-cfg.c (verify_gimple_comparison): Check result
>>>>> type of comparison expression.
>>>>> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
>>>>> casts from/to boolean,
>>>>> * tree-ssa-forwprop.c (combine_cond_expr_cond): Add simplification
>>>>> support for one-bit-precision typed X for cases X != 0 and X == 0.
>>>>> (forward_propagate_comparison): Adjust test of condition
>>>>> result.
>>>>>
>>>>>
>>>>> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
>>>>> * gcc.dg/tree-ssa/pr21031.c: Likewise.
>>>>> * gcc.dg/tree-ssa/pr30978.c: Likewise.
>>>>> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
>>>>> * gcc.dg/binop-xor1.c: Mark it as expected fail.
>>>>> * gcc.dg/binop-xor3.c: Likewise.
>>>>> * gcc.dg/uninit-15.c: Adjust reported message.
>>>>>
>>>>> Index: gcc-head/gcc/fold-const.c
>>>>> ===================================================================
>>>>> --- gcc-head.orig/gcc/fold-const.c
>>>>> +++ gcc-head/gcc/fold-const.c
>>>>> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
>>>>> non-integral type.
>>>>> Do not fold the result as that would not simplify further, also
>>>>> folding again results in recursions. */
>>>>> - if (INTEGRAL_TYPE_P (type))
>>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>>> return build2_loc (loc, TREE_CODE (op0), type,
>>>>> TREE_OPERAND (op0, 0),
>>>>> TREE_OPERAND (op0, 1));
>>>>> - else
>>>>> + else if (!INTEGRAL_TYPE_P (type))
>>>>> return build3_loc (loc, COND_EXPR, type, op0,
>>>>> fold_convert (type, boolean_true_node),
>>>>> fold_convert (type, boolean_false_node));
>>>>> Index: gcc-head/gcc/gimplify.c
>>>>> ===================================================================
>>>>> --- gcc-head.orig/gcc/gimplify.c
>>>>> +++ gcc-head/gcc/gimplify.c
>>>>> @@ -2842,18 +2842,23 @@ gimple_boolify (tree expr)
>>>>>
>>>>> case TRUTH_NOT_EXPR:
>>>>> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
>>>>> - /* FALLTHRU */
>>>>>
>>>>> - case EQ_EXPR: case NE_EXPR:
>>>>> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
>>>>> /* These expressions always produce boolean results. */
>>>>> - TREE_TYPE (expr) = boolean_type_node;
>>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>>> return expr;
>>>>>
>>>>> default:
>>>>> + if (COMPARISON_CLASS_P (expr))
>>>>> + {
>>>>> + /* There expressions always prduce boolean results. */
>>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>>> + return expr;
>>>>> + }
>>>>> /* Other expressions that get here must have boolean values, but
>>>>> might need to be converted to the appropriate mode. */
>>>>> - if (type == boolean_type_node)
>>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>>> return expr;
>>>>> return fold_convert_loc (loc, boolean_type_node, expr);
>>>>> }
>>>>> @@ -6763,7 +6768,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>> tree org_type = TREE_TYPE (*expr_p);
>>>>>
>>>>> *expr_p = gimple_boolify (*expr_p);
>>>>> - if (org_type != boolean_type_node)
>>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>>> {
>>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>>
>>>> Use fold_convert_loc with saved_location
>>>
>>> Oh, good catch. Yes, I will adjust that.
>>>
>>>>> ret = GS_OK;
>>>>> @@ -7208,7 +7213,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>> fold_truth_not_expr) happily uses operand type and doesn't
>>>>> automatically uses boolean_type as result, we need to keep
>>>>> orignal type. */
>>>>> - if (org_type != boolean_type_node)
>>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>>> {
>>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>>
>>>> Likewise. Maybe this fixes the diagnostic regression.
>>>>
>>>>> ret = GS_OK;
>>>>> @@ -7288,7 +7293,19 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>>>>>
>>>>> if (!AGGREGATE_TYPE_P (type))
>>>>> - goto expr_2;
>>>>> + {
>>>>> + tree org_type = TREE_TYPE (*expr_p);
>>>>> + *expr_p = gimple_boolify (*expr_p);
>>>>> + if (!useless_type_conversion_p (org_type,
>>>>> + TREE_TYPE (*expr_p)))
>>>>> + {
>>>>> + *expr_p = fold_convert_loc (saved_location,
>>>>> + org_type, *expr_p);
>>>>> + ret = GS_OK;
>>>>> + }
>>>>> + else
>>>>> + goto expr_2;
>>>>> + }
>>>>> else if (TYPE_MODE (type) != BLKmode)
>>>>> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
>>>>> else
>>>>> Index: gcc-head/gcc/tree-cfg.c
>>>>> ===================================================================
>>>>> --- gcc-head.orig/gcc/tree-cfg.c
>>>>> +++ gcc-head/gcc/tree-cfg.c
>>>>> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
>>>>> && (!POINTER_TYPE_P (op0_type)
>>>>> || !POINTER_TYPE_P (op1_type)
>>>>> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
>>>>> - || !INTEGRAL_TYPE_P (type))
>>>>> + || !INTEGRAL_TYPE_P (type)
>>>>> + || (TREE_CODE (type) != BOOLEAN_TYPE
>>>>> + && TYPE_PRECISION (type) != 1))
>>>>> {
>>>>> error ("type mismatch in comparison expression");
>>>>> debug_generic_expr (type);
>>>>> Index: gcc-head/gcc/tree-ssa.c
>>>>> ===================================================================
>>>>> --- gcc-head.orig/gcc/tree-ssa.c
>>>>> +++ gcc-head/gcc/tree-ssa.c
>>>>> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
>>>>> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
>>>>> return false;
>>>>>
>>>>> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
>>>>> - one. */
>>>>> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
>>>>> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
>>>>> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
>>>>> + of precision one. */
>>>>> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
>>>>> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
>>>>> && TYPE_PRECISION (outer_type) != 1)
>>>>> return false;
>>>>>
>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>> ===================================================================
>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>> @@ -11,5 +11,5 @@ f (int i, float j)
>>>>>
>>>>> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
>>>>> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
>>>>> "forwprop1"} } */
>>>>> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
>>>>> "forwprop1"} } */
>>>>> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
>>>>> 1\);\n[^\n]*if} "forwprop1"} } */
>>>>
>>>> Hm? Why that?
>>>>
>>>>> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>> ===================================================================
>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>> @@ -16,5 +16,5 @@ foo (int a)
>>>>> return 0;
>>>>> }
>>>>>
>>>>> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
>>>>> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
>>>>> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>> ===================================================================
>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>> @@ -10,5 +10,5 @@ int foo(int a)
>>>>> return e;
>>>>> }
>>>>>
>>>>> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
>>>>> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
>>>>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>> ===================================================================
>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>> @@ -2,5 +2,5 @@
>>>>> /* { dg-options "-O -fdump-tree-fre1-details" } */
>>>>>
>>>>> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
>>>>> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
>>>>> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
>>>>> /* { dg-final { cleanup-tree-dump "fre1" } } */
>>>>> Index: gcc-head/gcc/tree-ssa-forwprop.c
>>>>> ===================================================================
>>>>> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
>>>>> +++ gcc-head/gcc/tree-ssa-forwprop.c
>>>>> @@ -367,9 +367,61 @@ combine_cond_expr_cond (location_t loc,
>>>>> gcc_assert (TREE_CODE_CLASS (code) == tcc_comparison);
>>>>>
>>>>> t = fold_binary_loc (loc, code, type, op0, op1);
>>>>> +
>>>>> + if (!t && INTEGRAL_TYPE_P (TREE_TYPE (op1))
>>>>> + && TYPE_PRECISION (TREE_TYPE (op1)) == 1
>>>>> + && (code == EQ_EXPR || code == NE_EXPR))
>>>>> + {
>>>>> + if (TREE_CODE (op1) == INTEGER_CST)
>>>>> + {
>>>>> + if (integer_onep (op1))
>>>>> + {
>>>>> + op1 = fold_convert_loc (loc, TREE_TYPE (op1), integer_zero_node);
>>>>> + code = (code == NE_EXPR ? EQ_EXPR : NE_EXPR);
>>>>
>>>> So you change truthvalue !=/== 1 to truthvalue ==/!= 0 and then
>>>> recurse ... that doesn't make sense to me and is super-ugly.
>>>> What's the testcase that made you add all this code?
>>>
>>> Well, the convert from truthvalue !=/== 1 to !=/== 0 limits the amount
>>> of cases to handle. As for truthvalued X the we have then just to
>>> handle two cases. X != 0 -> X, and X == 0 -> (X ^ 1).
>>> The recursion is someting I saw as existing pattern (for the same
>>> thing) in truth-op folding in fold-const.
>>>
>>> Actual I can remove this optimization here, as it should be convered
>>> by VRP already (when VRP handles 1-bit precision bitwise ops proper).
>>
>> We should have a canonical form for those compares and change
>> them accordingly, best in fold_stmt.
>>
>> Richard.
>
> Hmm, I tried to add this code-pattern to fold_stmt, but for this kind
> of branch it seems not to be invoked at all. At least not now without
> boolification of compares. One nit I found for GIMPLE_BINARY, as here
> just patterns getting replaced, which have fewer number of ops then
> original statement. This check looks a bit bogus.
> For getting this normalization right now in a consistant way,
> fold-const might be right now the better place to handle this.
It gets invoked (well, should get invoked) when anyone changes the
statement. If it is present in that form from the beginning then we
lack canonicalization in fold and/or gimplification.
I suppose you have a testcase?
Richard.
> Regards,
> Kai
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-12 9:29 ` Richard Guenther
@ 2011-07-12 10:00 ` Kai Tietz
2011-07-12 10:34 ` Richard Guenther
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-12 10:00 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
2011/7/12 Richard Guenther <richard.guenther@gmail.com>:
> On Mon, Jul 11, 2011 at 5:37 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>>> On Fri, Jul 8, 2011 at 1:32 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>>>>> On Thu, Jul 7, 2011 at 6:07 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>>>> Hello,
>>>>>>
>>>>>> This patch - second of series - adds boolification of comparisions in
>>>>>> gimplifier. For this
>>>>>> casts from/to boolean are marked as not-useless. And in fold_unary_loc
>>>>>> casts to non-boolean integral types are preserved.
>>>>>> The hunk in tree-ssa-forwprop.c in combine_cond-expr_cond is not strictly
>>>>>> necessary - as long as fold-const handles 1-bit precision bitwise-expression
>>>>>> with truth-logic - but it has shown to short-cut some expensier folding. So
>>>>>> I kept it within this patch.
>>>>>
>>>>> Please split it out. Also ...
>>>>>
>>>>>>
>>>>>> The adjusted testcase gcc.dg/uninit-15.c indicates that due
>>>>>> optimization we loose
>>>>>> in this case variables declaration. But this might be to be expected.
>>>>>>
>>>>>> In vectorization we have a regression in gcc.dg/vect/vect-cond-3.c
>>>>>> test-case. It's caused
>>>>>> by always having boolean-type on conditions. So vectorizer sees
>>>>>> different types, which
>>>>>> aren't handled by vectorizer right now. Maybe this issue could be
>>>>>> special-cased for
>>>>>> boolean-types in tree-vect-loop, by making operand for used condition
>>>>>> equal to vector-type.
>>>>>> But this is a subject for a different patch and not addressed by this series.
>>>>>>
>>>>>> There is a regressions in tree-ssa/vrp47.c, and the fix is addressed
>>>>>> by the 3rd patch of this
>>>>>> series.
>>>>>>
>>>>>> Bootstrapped and regression tested for all standard-languages (plus
>>>>>> Ada and Obj-C++) on host x86_64-pc-linux-gnu.
>>>>>>
>>>>>> Ok for apply?
>>>>>>
>>>>>> Regards,
>>>>>> Kai
>>>>>>
>>>>>>
>>>>>> ChangeLog
>>>>>>
>>>>>> 2011-07-07 Kai Tietz <ktietz@redhat.com>
>>>>>>
>>>>>> * fold-const.c (fold_unary_loc): Preserve
>>>>>> non-boolean-typed casts.
>>>>>> * gimplify.c (gimple_boolify): Handle boolification
>>>>>> of comparisons.
>>>>>> (gimplify_expr): Boolifiy non aggregate-typed
>>>>>> comparisons.
>>>>>> * tree-cfg.c (verify_gimple_comparison): Check result
>>>>>> type of comparison expression.
>>>>>> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
>>>>>> casts from/to boolean,
>>>>>> * tree-ssa-forwprop.c (combine_cond_expr_cond): Add simplification
>>>>>> support for one-bit-precision typed X for cases X != 0 and X == 0.
>>>>>> (forward_propagate_comparison): Adjust test of condition
>>>>>> result.
>>>>>>
>>>>>>
>>>>>> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
>>>>>> * gcc.dg/tree-ssa/pr21031.c: Likewise.
>>>>>> * gcc.dg/tree-ssa/pr30978.c: Likewise.
>>>>>> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
>>>>>> * gcc.dg/binop-xor1.c: Mark it as expected fail.
>>>>>> * gcc.dg/binop-xor3.c: Likewise.
>>>>>> * gcc.dg/uninit-15.c: Adjust reported message.
>>>>>>
>>>>>> Index: gcc-head/gcc/fold-const.c
>>>>>> ===================================================================
>>>>>> --- gcc-head.orig/gcc/fold-const.c
>>>>>> +++ gcc-head/gcc/fold-const.c
>>>>>> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
>>>>>> non-integral type.
>>>>>> Do not fold the result as that would not simplify further, also
>>>>>> folding again results in recursions. */
>>>>>> - if (INTEGRAL_TYPE_P (type))
>>>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>>>> return build2_loc (loc, TREE_CODE (op0), type,
>>>>>> TREE_OPERAND (op0, 0),
>>>>>> TREE_OPERAND (op0, 1));
>>>>>> - else
>>>>>> + else if (!INTEGRAL_TYPE_P (type))
>>>>>> return build3_loc (loc, COND_EXPR, type, op0,
>>>>>> fold_convert (type, boolean_true_node),
>>>>>> fold_convert (type, boolean_false_node));
>>>>>> Index: gcc-head/gcc/gimplify.c
>>>>>> ===================================================================
>>>>>> --- gcc-head.orig/gcc/gimplify.c
>>>>>> +++ gcc-head/gcc/gimplify.c
>>>>>> @@ -2842,18 +2842,23 @@ gimple_boolify (tree expr)
>>>>>>
>>>>>> case TRUTH_NOT_EXPR:
>>>>>> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
>>>>>> - /* FALLTHRU */
>>>>>>
>>>>>> - case EQ_EXPR: case NE_EXPR:
>>>>>> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
>>>>>> /* These expressions always produce boolean results. */
>>>>>> - TREE_TYPE (expr) = boolean_type_node;
>>>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>>>> return expr;
>>>>>>
>>>>>> default:
>>>>>> + if (COMPARISON_CLASS_P (expr))
>>>>>> + {
>>>>>> + /* There expressions always prduce boolean results. */
>>>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>>>> + return expr;
>>>>>> + }
>>>>>> /* Other expressions that get here must have boolean values, but
>>>>>> might need to be converted to the appropriate mode. */
>>>>>> - if (type == boolean_type_node)
>>>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>>>> return expr;
>>>>>> return fold_convert_loc (loc, boolean_type_node, expr);
>>>>>> }
>>>>>> @@ -6763,7 +6768,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>> tree org_type = TREE_TYPE (*expr_p);
>>>>>>
>>>>>> *expr_p = gimple_boolify (*expr_p);
>>>>>> - if (org_type != boolean_type_node)
>>>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>>>> {
>>>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>>>
>>>>> Use fold_convert_loc with saved_location
>>>>
>>>> Oh, good catch. Yes, I will adjust that.
>>>>
>>>>>> ret = GS_OK;
>>>>>> @@ -7208,7 +7213,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>> fold_truth_not_expr) happily uses operand type and doesn't
>>>>>> automatically uses boolean_type as result, we need to keep
>>>>>> orignal type. */
>>>>>> - if (org_type != boolean_type_node)
>>>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>>>> {
>>>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>>>
>>>>> Likewise. Maybe this fixes the diagnostic regression.
>>>>>
>>>>>> ret = GS_OK;
>>>>>> @@ -7288,7 +7293,19 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>>>>>>
>>>>>> if (!AGGREGATE_TYPE_P (type))
>>>>>> - goto expr_2;
>>>>>> + {
>>>>>> + tree org_type = TREE_TYPE (*expr_p);
>>>>>> + *expr_p = gimple_boolify (*expr_p);
>>>>>> + if (!useless_type_conversion_p (org_type,
>>>>>> + TREE_TYPE (*expr_p)))
>>>>>> + {
>>>>>> + *expr_p = fold_convert_loc (saved_location,
>>>>>> + org_type, *expr_p);
>>>>>> + ret = GS_OK;
>>>>>> + }
>>>>>> + else
>>>>>> + goto expr_2;
>>>>>> + }
>>>>>> else if (TYPE_MODE (type) != BLKmode)
>>>>>> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
>>>>>> else
>>>>>> Index: gcc-head/gcc/tree-cfg.c
>>>>>> ===================================================================
>>>>>> --- gcc-head.orig/gcc/tree-cfg.c
>>>>>> +++ gcc-head/gcc/tree-cfg.c
>>>>>> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
>>>>>> && (!POINTER_TYPE_P (op0_type)
>>>>>> || !POINTER_TYPE_P (op1_type)
>>>>>> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
>>>>>> - || !INTEGRAL_TYPE_P (type))
>>>>>> + || !INTEGRAL_TYPE_P (type)
>>>>>> + || (TREE_CODE (type) != BOOLEAN_TYPE
>>>>>> + && TYPE_PRECISION (type) != 1))
>>>>>> {
>>>>>> error ("type mismatch in comparison expression");
>>>>>> debug_generic_expr (type);
>>>>>> Index: gcc-head/gcc/tree-ssa.c
>>>>>> ===================================================================
>>>>>> --- gcc-head.orig/gcc/tree-ssa.c
>>>>>> +++ gcc-head/gcc/tree-ssa.c
>>>>>> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
>>>>>> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
>>>>>> return false;
>>>>>>
>>>>>> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
>>>>>> - one. */
>>>>>> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
>>>>>> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
>>>>>> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
>>>>>> + of precision one. */
>>>>>> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
>>>>>> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
>>>>>> && TYPE_PRECISION (outer_type) != 1)
>>>>>> return false;
>>>>>>
>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>> ===================================================================
>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>> @@ -11,5 +11,5 @@ f (int i, float j)
>>>>>>
>>>>>> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
>>>>>> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
>>>>>> "forwprop1"} } */
>>>>>> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
>>>>>> "forwprop1"} } */
>>>>>> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
>>>>>> 1\);\n[^\n]*if} "forwprop1"} } */
>>>>>
>>>>> Hm? Why that?
>>>>>
>>>>>> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>> ===================================================================
>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>> @@ -16,5 +16,5 @@ foo (int a)
>>>>>> return 0;
>>>>>> }
>>>>>>
>>>>>> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
>>>>>> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
>>>>>> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>> ===================================================================
>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>> @@ -10,5 +10,5 @@ int foo(int a)
>>>>>> return e;
>>>>>> }
>>>>>>
>>>>>> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
>>>>>> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
>>>>>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>> ===================================================================
>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>> @@ -2,5 +2,5 @@
>>>>>> /* { dg-options "-O -fdump-tree-fre1-details" } */
>>>>>>
>>>>>> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
>>>>>> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
>>>>>> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
>>>>>> /* { dg-final { cleanup-tree-dump "fre1" } } */
>>>>>> Index: gcc-head/gcc/tree-ssa-forwprop.c
>>>>>> ===================================================================
>>>>>> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
>>>>>> +++ gcc-head/gcc/tree-ssa-forwprop.c
>>>>>> @@ -367,9 +367,61 @@ combine_cond_expr_cond (location_t loc,
>>>>>> gcc_assert (TREE_CODE_CLASS (code) == tcc_comparison);
>>>>>>
>>>>>> t = fold_binary_loc (loc, code, type, op0, op1);
>>>>>> +
>>>>>> + if (!t && INTEGRAL_TYPE_P (TREE_TYPE (op1))
>>>>>> + && TYPE_PRECISION (TREE_TYPE (op1)) == 1
>>>>>> + && (code == EQ_EXPR || code == NE_EXPR))
>>>>>> + {
>>>>>> + if (TREE_CODE (op1) == INTEGER_CST)
>>>>>> + {
>>>>>> + if (integer_onep (op1))
>>>>>> + {
>>>>>> + op1 = fold_convert_loc (loc, TREE_TYPE (op1), integer_zero_node);
>>>>>> + code = (code == NE_EXPR ? EQ_EXPR : NE_EXPR);
>>>>>
>>>>> So you change truthvalue !=/== 1 to truthvalue ==/!= 0 and then
>>>>> recurse ... that doesn't make sense to me and is super-ugly.
>>>>> What's the testcase that made you add all this code?
>>>>
>>>> Well, the convert from truthvalue !=/== 1 to !=/== 0 limits the amount
>>>> of cases to handle. As for truthvalued X the we have then just to
>>>> handle two cases. X != 0 -> X, and X == 0 -> (X ^ 1).
>>>> The recursion is someting I saw as existing pattern (for the same
>>>> thing) in truth-op folding in fold-const.
>>>>
>>>> Actual I can remove this optimization here, as it should be convered
>>>> by VRP already (when VRP handles 1-bit precision bitwise ops proper).
>>>
>>> We should have a canonical form for those compares and change
>>> them accordingly, best in fold_stmt.
>>>
>>> Richard.
>>
>> Hmm, I tried to add this code-pattern to fold_stmt, but for this kind
>> of branch it seems not to be invoked at all. At least not now without
>> boolification of compares. One nit I found for GIMPLE_BINARY, as here
>> just patterns getting replaced, which have fewer number of ops then
>> original statement. This check looks a bit bogus.
>> For getting this normalization right now in a consistant way,
>> fold-const might be right now the better place to handle this.
>
> It gets invoked (well, should get invoked) when anyone changes the
> statement. If it is present in that form from the beginning then we
> lack canonicalization in fold and/or gimplification.
>
> I suppose you have a testcase?
>
> Richard.
>
>> Regards,
>> Kai
>>
Yes, testcase looks like this:
int foo (_Bool a, _Bool b)
{
return a != ((b | !b));
}
while reduces to
...
return a != 1; right now, and not a == 0 (as a is boolean)
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-12 10:00 ` Kai Tietz
@ 2011-07-12 10:34 ` Richard Guenther
2011-07-12 12:25 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Richard Guenther @ 2011-07-12 10:34 UTC (permalink / raw)
To: Kai Tietz; +Cc: GCC Patches
On Tue, Jul 12, 2011 at 11:48 AM, Kai Tietz <ktietz70@googlemail.com> wrote:
> 2011/7/12 Richard Guenther <richard.guenther@gmail.com>:
>> On Mon, Jul 11, 2011 at 5:37 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>>>> On Fri, Jul 8, 2011 at 1:32 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>>> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>>>>>> On Thu, Jul 7, 2011 at 6:07 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>>>>> Hello,
>>>>>>>
>>>>>>> This patch - second of series - adds boolification of comparisions in
>>>>>>> gimplifier. For this
>>>>>>> casts from/to boolean are marked as not-useless. And in fold_unary_loc
>>>>>>> casts to non-boolean integral types are preserved.
>>>>>>> The hunk in tree-ssa-forwprop.c in combine_cond-expr_cond is not strictly
>>>>>>> necessary - as long as fold-const handles 1-bit precision bitwise-expression
>>>>>>> with truth-logic - but it has shown to short-cut some expensier folding. So
>>>>>>> I kept it within this patch.
>>>>>>
>>>>>> Please split it out. Also ...
>>>>>>
>>>>>>>
>>>>>>> The adjusted testcase gcc.dg/uninit-15.c indicates that due
>>>>>>> optimization we loose
>>>>>>> in this case variables declaration. But this might be to be expected.
>>>>>>>
>>>>>>> In vectorization we have a regression in gcc.dg/vect/vect-cond-3.c
>>>>>>> test-case. It's caused
>>>>>>> by always having boolean-type on conditions. So vectorizer sees
>>>>>>> different types, which
>>>>>>> aren't handled by vectorizer right now. Maybe this issue could be
>>>>>>> special-cased for
>>>>>>> boolean-types in tree-vect-loop, by making operand for used condition
>>>>>>> equal to vector-type.
>>>>>>> But this is a subject for a different patch and not addressed by this series.
>>>>>>>
>>>>>>> There is a regressions in tree-ssa/vrp47.c, and the fix is addressed
>>>>>>> by the 3rd patch of this
>>>>>>> series.
>>>>>>>
>>>>>>> Bootstrapped and regression tested for all standard-languages (plus
>>>>>>> Ada and Obj-C++) on host x86_64-pc-linux-gnu.
>>>>>>>
>>>>>>> Ok for apply?
>>>>>>>
>>>>>>> Regards,
>>>>>>> Kai
>>>>>>>
>>>>>>>
>>>>>>> ChangeLog
>>>>>>>
>>>>>>> 2011-07-07 Kai Tietz <ktietz@redhat.com>
>>>>>>>
>>>>>>> * fold-const.c (fold_unary_loc): Preserve
>>>>>>> non-boolean-typed casts.
>>>>>>> * gimplify.c (gimple_boolify): Handle boolification
>>>>>>> of comparisons.
>>>>>>> (gimplify_expr): Boolifiy non aggregate-typed
>>>>>>> comparisons.
>>>>>>> * tree-cfg.c (verify_gimple_comparison): Check result
>>>>>>> type of comparison expression.
>>>>>>> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
>>>>>>> casts from/to boolean,
>>>>>>> * tree-ssa-forwprop.c (combine_cond_expr_cond): Add simplification
>>>>>>> support for one-bit-precision typed X for cases X != 0 and X == 0.
>>>>>>> (forward_propagate_comparison): Adjust test of condition
>>>>>>> result.
>>>>>>>
>>>>>>>
>>>>>>> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
>>>>>>> * gcc.dg/tree-ssa/pr21031.c: Likewise.
>>>>>>> * gcc.dg/tree-ssa/pr30978.c: Likewise.
>>>>>>> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
>>>>>>> * gcc.dg/binop-xor1.c: Mark it as expected fail.
>>>>>>> * gcc.dg/binop-xor3.c: Likewise.
>>>>>>> * gcc.dg/uninit-15.c: Adjust reported message.
>>>>>>>
>>>>>>> Index: gcc-head/gcc/fold-const.c
>>>>>>> ===================================================================
>>>>>>> --- gcc-head.orig/gcc/fold-const.c
>>>>>>> +++ gcc-head/gcc/fold-const.c
>>>>>>> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
>>>>>>> non-integral type.
>>>>>>> Do not fold the result as that would not simplify further, also
>>>>>>> folding again results in recursions. */
>>>>>>> - if (INTEGRAL_TYPE_P (type))
>>>>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>>>>> return build2_loc (loc, TREE_CODE (op0), type,
>>>>>>> TREE_OPERAND (op0, 0),
>>>>>>> TREE_OPERAND (op0, 1));
>>>>>>> - else
>>>>>>> + else if (!INTEGRAL_TYPE_P (type))
>>>>>>> return build3_loc (loc, COND_EXPR, type, op0,
>>>>>>> fold_convert (type, boolean_true_node),
>>>>>>> fold_convert (type, boolean_false_node));
>>>>>>> Index: gcc-head/gcc/gimplify.c
>>>>>>> ===================================================================
>>>>>>> --- gcc-head.orig/gcc/gimplify.c
>>>>>>> +++ gcc-head/gcc/gimplify.c
>>>>>>> @@ -2842,18 +2842,23 @@ gimple_boolify (tree expr)
>>>>>>>
>>>>>>> case TRUTH_NOT_EXPR:
>>>>>>> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
>>>>>>> - /* FALLTHRU */
>>>>>>>
>>>>>>> - case EQ_EXPR: case NE_EXPR:
>>>>>>> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
>>>>>>> /* These expressions always produce boolean results. */
>>>>>>> - TREE_TYPE (expr) = boolean_type_node;
>>>>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>>>>> return expr;
>>>>>>>
>>>>>>> default:
>>>>>>> + if (COMPARISON_CLASS_P (expr))
>>>>>>> + {
>>>>>>> + /* There expressions always prduce boolean results. */
>>>>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>>>>> + return expr;
>>>>>>> + }
>>>>>>> /* Other expressions that get here must have boolean values, but
>>>>>>> might need to be converted to the appropriate mode. */
>>>>>>> - if (type == boolean_type_node)
>>>>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>>>>> return expr;
>>>>>>> return fold_convert_loc (loc, boolean_type_node, expr);
>>>>>>> }
>>>>>>> @@ -6763,7 +6768,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>>> tree org_type = TREE_TYPE (*expr_p);
>>>>>>>
>>>>>>> *expr_p = gimple_boolify (*expr_p);
>>>>>>> - if (org_type != boolean_type_node)
>>>>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>>>>> {
>>>>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>>>>
>>>>>> Use fold_convert_loc with saved_location
>>>>>
>>>>> Oh, good catch. Yes, I will adjust that.
>>>>>
>>>>>>> ret = GS_OK;
>>>>>>> @@ -7208,7 +7213,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>>> fold_truth_not_expr) happily uses operand type and doesn't
>>>>>>> automatically uses boolean_type as result, we need to keep
>>>>>>> orignal type. */
>>>>>>> - if (org_type != boolean_type_node)
>>>>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>>>>> {
>>>>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>>>>
>>>>>> Likewise. Maybe this fixes the diagnostic regression.
>>>>>>
>>>>>>> ret = GS_OK;
>>>>>>> @@ -7288,7 +7293,19 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>>> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>>>>>>>
>>>>>>> if (!AGGREGATE_TYPE_P (type))
>>>>>>> - goto expr_2;
>>>>>>> + {
>>>>>>> + tree org_type = TREE_TYPE (*expr_p);
>>>>>>> + *expr_p = gimple_boolify (*expr_p);
>>>>>>> + if (!useless_type_conversion_p (org_type,
>>>>>>> + TREE_TYPE (*expr_p)))
>>>>>>> + {
>>>>>>> + *expr_p = fold_convert_loc (saved_location,
>>>>>>> + org_type, *expr_p);
>>>>>>> + ret = GS_OK;
>>>>>>> + }
>>>>>>> + else
>>>>>>> + goto expr_2;
>>>>>>> + }
>>>>>>> else if (TYPE_MODE (type) != BLKmode)
>>>>>>> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
>>>>>>> else
>>>>>>> Index: gcc-head/gcc/tree-cfg.c
>>>>>>> ===================================================================
>>>>>>> --- gcc-head.orig/gcc/tree-cfg.c
>>>>>>> +++ gcc-head/gcc/tree-cfg.c
>>>>>>> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
>>>>>>> && (!POINTER_TYPE_P (op0_type)
>>>>>>> || !POINTER_TYPE_P (op1_type)
>>>>>>> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
>>>>>>> - || !INTEGRAL_TYPE_P (type))
>>>>>>> + || !INTEGRAL_TYPE_P (type)
>>>>>>> + || (TREE_CODE (type) != BOOLEAN_TYPE
>>>>>>> + && TYPE_PRECISION (type) != 1))
>>>>>>> {
>>>>>>> error ("type mismatch in comparison expression");
>>>>>>> debug_generic_expr (type);
>>>>>>> Index: gcc-head/gcc/tree-ssa.c
>>>>>>> ===================================================================
>>>>>>> --- gcc-head.orig/gcc/tree-ssa.c
>>>>>>> +++ gcc-head/gcc/tree-ssa.c
>>>>>>> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
>>>>>>> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
>>>>>>> return false;
>>>>>>>
>>>>>>> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
>>>>>>> - one. */
>>>>>>> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
>>>>>>> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
>>>>>>> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
>>>>>>> + of precision one. */
>>>>>>> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
>>>>>>> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
>>>>>>> && TYPE_PRECISION (outer_type) != 1)
>>>>>>> return false;
>>>>>>>
>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>>> ===================================================================
>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>>> @@ -11,5 +11,5 @@ f (int i, float j)
>>>>>>>
>>>>>>> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
>>>>>>> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
>>>>>>> "forwprop1"} } */
>>>>>>> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
>>>>>>> "forwprop1"} } */
>>>>>>> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
>>>>>>> 1\);\n[^\n]*if} "forwprop1"} } */
>>>>>>
>>>>>> Hm? Why that?
>>>>>>
>>>>>>> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>>> ===================================================================
>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>>> @@ -16,5 +16,5 @@ foo (int a)
>>>>>>> return 0;
>>>>>>> }
>>>>>>>
>>>>>>> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
>>>>>>> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
>>>>>>> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>>> ===================================================================
>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>>> @@ -10,5 +10,5 @@ int foo(int a)
>>>>>>> return e;
>>>>>>> }
>>>>>>>
>>>>>>> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
>>>>>>> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
>>>>>>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>>> ===================================================================
>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>>> @@ -2,5 +2,5 @@
>>>>>>> /* { dg-options "-O -fdump-tree-fre1-details" } */
>>>>>>>
>>>>>>> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
>>>>>>> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
>>>>>>> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
>>>>>>> /* { dg-final { cleanup-tree-dump "fre1" } } */
>>>>>>> Index: gcc-head/gcc/tree-ssa-forwprop.c
>>>>>>> ===================================================================
>>>>>>> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
>>>>>>> +++ gcc-head/gcc/tree-ssa-forwprop.c
>>>>>>> @@ -367,9 +367,61 @@ combine_cond_expr_cond (location_t loc,
>>>>>>> gcc_assert (TREE_CODE_CLASS (code) == tcc_comparison);
>>>>>>>
>>>>>>> t = fold_binary_loc (loc, code, type, op0, op1);
>>>>>>> +
>>>>>>> + if (!t && INTEGRAL_TYPE_P (TREE_TYPE (op1))
>>>>>>> + && TYPE_PRECISION (TREE_TYPE (op1)) == 1
>>>>>>> + && (code == EQ_EXPR || code == NE_EXPR))
>>>>>>> + {
>>>>>>> + if (TREE_CODE (op1) == INTEGER_CST)
>>>>>>> + {
>>>>>>> + if (integer_onep (op1))
>>>>>>> + {
>>>>>>> + op1 = fold_convert_loc (loc, TREE_TYPE (op1), integer_zero_node);
>>>>>>> + code = (code == NE_EXPR ? EQ_EXPR : NE_EXPR);
>>>>>>
>>>>>> So you change truthvalue !=/== 1 to truthvalue ==/!= 0 and then
>>>>>> recurse ... that doesn't make sense to me and is super-ugly.
>>>>>> What's the testcase that made you add all this code?
>>>>>
>>>>> Well, the convert from truthvalue !=/== 1 to !=/== 0 limits the amount
>>>>> of cases to handle. As for truthvalued X the we have then just to
>>>>> handle two cases. X != 0 -> X, and X == 0 -> (X ^ 1).
>>>>> The recursion is someting I saw as existing pattern (for the same
>>>>> thing) in truth-op folding in fold-const.
>>>>>
>>>>> Actual I can remove this optimization here, as it should be convered
>>>>> by VRP already (when VRP handles 1-bit precision bitwise ops proper).
>>>>
>>>> We should have a canonical form for those compares and change
>>>> them accordingly, best in fold_stmt.
>>>>
>>>> Richard.
>>>
>>> Hmm, I tried to add this code-pattern to fold_stmt, but for this kind
>>> of branch it seems not to be invoked at all. At least not now without
>>> boolification of compares. One nit I found for GIMPLE_BINARY, as here
>>> just patterns getting replaced, which have fewer number of ops then
>>> original statement. This check looks a bit bogus.
>>> For getting this normalization right now in a consistant way,
>>> fold-const might be right now the better place to handle this.
>>
>> It gets invoked (well, should get invoked) when anyone changes the
>> statement. If it is present in that form from the beginning then we
>> lack canonicalization in fold and/or gimplification.
>>
>> I suppose you have a testcase?
>>
>> Richard.
>>
>>> Regards,
>>> Kai
>>>
>
> Yes, testcase looks like this:
>
> int foo (_Bool a, _Bool b)
> {
> return a != ((b | !b));
> }
>
> while reduces to
> ...
> return a != 1; right now, and not a == 0 (as a is boolean)
fold_stmt should be called when copyprop produces a != 1
via substitute_and_fold:
/* Replace real uses in the statement. */
if (get_value_fn)
did_replace |= replace_uses_in (stmt, get_value_fn);
/* If we made a replacement, fold the statement. */
if (did_replace)
fold_stmt (&oldi);
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-12 10:34 ` Richard Guenther
@ 2011-07-12 12:25 ` Kai Tietz
2011-07-12 14:38 ` Richard Guenther
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-12 12:25 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
2011/7/12 Richard Guenther <richard.guenther@gmail.com>:
> On Tue, Jul 12, 2011 at 11:48 AM, Kai Tietz <ktietz70@googlemail.com> wrote:
>> 2011/7/12 Richard Guenther <richard.guenther@gmail.com>:
>>> On Mon, Jul 11, 2011 at 5:37 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>>>>> On Fri, Jul 8, 2011 at 1:32 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>>>> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>>>>>>> On Thu, Jul 7, 2011 at 6:07 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>>>>>> Hello,
>>>>>>>>
>>>>>>>> This patch - second of series - adds boolification of comparisions in
>>>>>>>> gimplifier. For this
>>>>>>>> casts from/to boolean are marked as not-useless. And in fold_unary_loc
>>>>>>>> casts to non-boolean integral types are preserved.
>>>>>>>> The hunk in tree-ssa-forwprop.c in combine_cond-expr_cond is not strictly
>>>>>>>> necessary - as long as fold-const handles 1-bit precision bitwise-expression
>>>>>>>> with truth-logic - but it has shown to short-cut some expensier folding. So
>>>>>>>> I kept it within this patch.
>>>>>>>
>>>>>>> Please split it out. Also ...
>>>>>>>
>>>>>>>>
>>>>>>>> The adjusted testcase gcc.dg/uninit-15.c indicates that due
>>>>>>>> optimization we loose
>>>>>>>> in this case variables declaration. But this might be to be expected.
>>>>>>>>
>>>>>>>> In vectorization we have a regression in gcc.dg/vect/vect-cond-3.c
>>>>>>>> test-case. It's caused
>>>>>>>> by always having boolean-type on conditions. So vectorizer sees
>>>>>>>> different types, which
>>>>>>>> aren't handled by vectorizer right now. Maybe this issue could be
>>>>>>>> special-cased for
>>>>>>>> boolean-types in tree-vect-loop, by making operand for used condition
>>>>>>>> equal to vector-type.
>>>>>>>> But this is a subject for a different patch and not addressed by this series.
>>>>>>>>
>>>>>>>> There is a regressions in tree-ssa/vrp47.c, and the fix is addressed
>>>>>>>> by the 3rd patch of this
>>>>>>>> series.
>>>>>>>>
>>>>>>>> Bootstrapped and regression tested for all standard-languages (plus
>>>>>>>> Ada and Obj-C++) on host x86_64-pc-linux-gnu.
>>>>>>>>
>>>>>>>> Ok for apply?
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Kai
>>>>>>>>
>>>>>>>>
>>>>>>>> ChangeLog
>>>>>>>>
>>>>>>>> 2011-07-07 Kai Tietz <ktietz@redhat.com>
>>>>>>>>
>>>>>>>> * fold-const.c (fold_unary_loc): Preserve
>>>>>>>> non-boolean-typed casts.
>>>>>>>> * gimplify.c (gimple_boolify): Handle boolification
>>>>>>>> of comparisons.
>>>>>>>> (gimplify_expr): Boolifiy non aggregate-typed
>>>>>>>> comparisons.
>>>>>>>> * tree-cfg.c (verify_gimple_comparison): Check result
>>>>>>>> type of comparison expression.
>>>>>>>> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
>>>>>>>> casts from/to boolean,
>>>>>>>> * tree-ssa-forwprop.c (combine_cond_expr_cond): Add simplification
>>>>>>>> support for one-bit-precision typed X for cases X != 0 and X == 0.
>>>>>>>> (forward_propagate_comparison): Adjust test of condition
>>>>>>>> result.
>>>>>>>>
>>>>>>>>
>>>>>>>> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
>>>>>>>> * gcc.dg/tree-ssa/pr21031.c: Likewise.
>>>>>>>> * gcc.dg/tree-ssa/pr30978.c: Likewise.
>>>>>>>> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
>>>>>>>> * gcc.dg/binop-xor1.c: Mark it as expected fail.
>>>>>>>> * gcc.dg/binop-xor3.c: Likewise.
>>>>>>>> * gcc.dg/uninit-15.c: Adjust reported message.
>>>>>>>>
>>>>>>>> Index: gcc-head/gcc/fold-const.c
>>>>>>>> ===================================================================
>>>>>>>> --- gcc-head.orig/gcc/fold-const.c
>>>>>>>> +++ gcc-head/gcc/fold-const.c
>>>>>>>> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
>>>>>>>> non-integral type.
>>>>>>>> Do not fold the result as that would not simplify further, also
>>>>>>>> folding again results in recursions. */
>>>>>>>> - if (INTEGRAL_TYPE_P (type))
>>>>>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>>>>>> return build2_loc (loc, TREE_CODE (op0), type,
>>>>>>>> TREE_OPERAND (op0, 0),
>>>>>>>> TREE_OPERAND (op0, 1));
>>>>>>>> - else
>>>>>>>> + else if (!INTEGRAL_TYPE_P (type))
>>>>>>>> return build3_loc (loc, COND_EXPR, type, op0,
>>>>>>>> fold_convert (type, boolean_true_node),
>>>>>>>> fold_convert (type, boolean_false_node));
>>>>>>>> Index: gcc-head/gcc/gimplify.c
>>>>>>>> ===================================================================
>>>>>>>> --- gcc-head.orig/gcc/gimplify.c
>>>>>>>> +++ gcc-head/gcc/gimplify.c
>>>>>>>> @@ -2842,18 +2842,23 @@ gimple_boolify (tree expr)
>>>>>>>>
>>>>>>>> case TRUTH_NOT_EXPR:
>>>>>>>> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
>>>>>>>> - /* FALLTHRU */
>>>>>>>>
>>>>>>>> - case EQ_EXPR: case NE_EXPR:
>>>>>>>> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
>>>>>>>> /* These expressions always produce boolean results. */
>>>>>>>> - TREE_TYPE (expr) = boolean_type_node;
>>>>>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>>>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>>>>>> return expr;
>>>>>>>>
>>>>>>>> default:
>>>>>>>> + if (COMPARISON_CLASS_P (expr))
>>>>>>>> + {
>>>>>>>> + /* There expressions always prduce boolean results. */
>>>>>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>>>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>>>>>> + return expr;
>>>>>>>> + }
>>>>>>>> /* Other expressions that get here must have boolean values, but
>>>>>>>> might need to be converted to the appropriate mode. */
>>>>>>>> - if (type == boolean_type_node)
>>>>>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>>>>>> return expr;
>>>>>>>> return fold_convert_loc (loc, boolean_type_node, expr);
>>>>>>>> }
>>>>>>>> @@ -6763,7 +6768,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>>>> tree org_type = TREE_TYPE (*expr_p);
>>>>>>>>
>>>>>>>> *expr_p = gimple_boolify (*expr_p);
>>>>>>>> - if (org_type != boolean_type_node)
>>>>>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>>>>>> {
>>>>>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>>>>>
>>>>>>> Use fold_convert_loc with saved_location
>>>>>>
>>>>>> Oh, good catch. Yes, I will adjust that.
>>>>>>
>>>>>>>> ret = GS_OK;
>>>>>>>> @@ -7208,7 +7213,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>>>> fold_truth_not_expr) happily uses operand type and doesn't
>>>>>>>> automatically uses boolean_type as result, we need to keep
>>>>>>>> orignal type. */
>>>>>>>> - if (org_type != boolean_type_node)
>>>>>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>>>>>> {
>>>>>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>>>>>
>>>>>>> Likewise. Maybe this fixes the diagnostic regression.
>>>>>>>
>>>>>>>> ret = GS_OK;
>>>>>>>> @@ -7288,7 +7293,19 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>>>> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>>>>>>>>
>>>>>>>> if (!AGGREGATE_TYPE_P (type))
>>>>>>>> - goto expr_2;
>>>>>>>> + {
>>>>>>>> + tree org_type = TREE_TYPE (*expr_p);
>>>>>>>> + *expr_p = gimple_boolify (*expr_p);
>>>>>>>> + if (!useless_type_conversion_p (org_type,
>>>>>>>> + TREE_TYPE (*expr_p)))
>>>>>>>> + {
>>>>>>>> + *expr_p = fold_convert_loc (saved_location,
>>>>>>>> + org_type, *expr_p);
>>>>>>>> + ret = GS_OK;
>>>>>>>> + }
>>>>>>>> + else
>>>>>>>> + goto expr_2;
>>>>>>>> + }
>>>>>>>> else if (TYPE_MODE (type) != BLKmode)
>>>>>>>> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
>>>>>>>> else
>>>>>>>> Index: gcc-head/gcc/tree-cfg.c
>>>>>>>> ===================================================================
>>>>>>>> --- gcc-head.orig/gcc/tree-cfg.c
>>>>>>>> +++ gcc-head/gcc/tree-cfg.c
>>>>>>>> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
>>>>>>>> && (!POINTER_TYPE_P (op0_type)
>>>>>>>> || !POINTER_TYPE_P (op1_type)
>>>>>>>> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
>>>>>>>> - || !INTEGRAL_TYPE_P (type))
>>>>>>>> + || !INTEGRAL_TYPE_P (type)
>>>>>>>> + || (TREE_CODE (type) != BOOLEAN_TYPE
>>>>>>>> + && TYPE_PRECISION (type) != 1))
>>>>>>>> {
>>>>>>>> error ("type mismatch in comparison expression");
>>>>>>>> debug_generic_expr (type);
>>>>>>>> Index: gcc-head/gcc/tree-ssa.c
>>>>>>>> ===================================================================
>>>>>>>> --- gcc-head.orig/gcc/tree-ssa.c
>>>>>>>> +++ gcc-head/gcc/tree-ssa.c
>>>>>>>> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
>>>>>>>> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
>>>>>>>> return false;
>>>>>>>>
>>>>>>>> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
>>>>>>>> - one. */
>>>>>>>> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
>>>>>>>> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
>>>>>>>> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
>>>>>>>> + of precision one. */
>>>>>>>> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
>>>>>>>> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
>>>>>>>> && TYPE_PRECISION (outer_type) != 1)
>>>>>>>> return false;
>>>>>>>>
>>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>>>> ===================================================================
>>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>>>> @@ -11,5 +11,5 @@ f (int i, float j)
>>>>>>>>
>>>>>>>> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
>>>>>>>> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
>>>>>>>> "forwprop1"} } */
>>>>>>>> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
>>>>>>>> "forwprop1"} } */
>>>>>>>> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
>>>>>>>> 1\);\n[^\n]*if} "forwprop1"} } */
>>>>>>>
>>>>>>> Hm? Why that?
>>>>>>>
>>>>>>>> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
>>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>>>> ===================================================================
>>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>>>> @@ -16,5 +16,5 @@ foo (int a)
>>>>>>>> return 0;
>>>>>>>> }
>>>>>>>>
>>>>>>>> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
>>>>>>>> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
>>>>>>>> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
>>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>>>> ===================================================================
>>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>>>> @@ -10,5 +10,5 @@ int foo(int a)
>>>>>>>> return e;
>>>>>>>> }
>>>>>>>>
>>>>>>>> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
>>>>>>>> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
>>>>>>>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>>>> ===================================================================
>>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>>>> @@ -2,5 +2,5 @@
>>>>>>>> /* { dg-options "-O -fdump-tree-fre1-details" } */
>>>>>>>>
>>>>>>>> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
>>>>>>>> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
>>>>>>>> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
>>>>>>>> /* { dg-final { cleanup-tree-dump "fre1" } } */
>>>>>>>> Index: gcc-head/gcc/tree-ssa-forwprop.c
>>>>>>>> ===================================================================
>>>>>>>> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
>>>>>>>> +++ gcc-head/gcc/tree-ssa-forwprop.c
>>>>>>>> @@ -367,9 +367,61 @@ combine_cond_expr_cond (location_t loc,
>>>>>>>> gcc_assert (TREE_CODE_CLASS (code) == tcc_comparison);
>>>>>>>>
>>>>>>>> t = fold_binary_loc (loc, code, type, op0, op1);
>>>>>>>> +
>>>>>>>> + if (!t && INTEGRAL_TYPE_P (TREE_TYPE (op1))
>>>>>>>> + && TYPE_PRECISION (TREE_TYPE (op1)) == 1
>>>>>>>> + && (code == EQ_EXPR || code == NE_EXPR))
>>>>>>>> + {
>>>>>>>> + if (TREE_CODE (op1) == INTEGER_CST)
>>>>>>>> + {
>>>>>>>> + if (integer_onep (op1))
>>>>>>>> + {
>>>>>>>> + op1 = fold_convert_loc (loc, TREE_TYPE (op1), integer_zero_node);
>>>>>>>> + code = (code == NE_EXPR ? EQ_EXPR : NE_EXPR);
>>>>>>>
>>>>>>> So you change truthvalue !=/== 1 to truthvalue ==/!= 0 and then
>>>>>>> recurse ... that doesn't make sense to me and is super-ugly.
>>>>>>> What's the testcase that made you add all this code?
>>>>>>
>>>>>> Well, the convert from truthvalue !=/== 1 to !=/== 0 limits the amount
>>>>>> of cases to handle. As for truthvalued X the we have then just to
>>>>>> handle two cases. X != 0 -> X, and X == 0 -> (X ^ 1).
>>>>>> The recursion is someting I saw as existing pattern (for the same
>>>>>> thing) in truth-op folding in fold-const.
>>>>>>
>>>>>> Actual I can remove this optimization here, as it should be convered
>>>>>> by VRP already (when VRP handles 1-bit precision bitwise ops proper).
>>>>>
>>>>> We should have a canonical form for those compares and change
>>>>> them accordingly, best in fold_stmt.
>>>>>
>>>>> Richard.
>>>>
>>>> Hmm, I tried to add this code-pattern to fold_stmt, but for this kind
>>>> of branch it seems not to be invoked at all. At least not now without
>>>> boolification of compares. One nit I found for GIMPLE_BINARY, as here
>>>> just patterns getting replaced, which have fewer number of ops then
>>>> original statement. This check looks a bit bogus.
>>>> For getting this normalization right now in a consistant way,
>>>> fold-const might be right now the better place to handle this.
>>>
>>> It gets invoked (well, should get invoked) when anyone changes the
>>> statement. If it is present in that form from the beginning then we
>>> lack canonicalization in fold and/or gimplification.
>>>
>>> I suppose you have a testcase?
>>>
>>> Richard.
>>>
>>>> Regards,
>>>> Kai
>>>>
>>
>> Yes, testcase looks like this:
>>
>> int foo (_Bool a, _Bool b)
>> {
>> return a != ((b | !b));
>> }
>>
>> while reduces to
>> ...
>> return a != 1; right now, and not a == 0 (as a is boolean)
>
> fold_stmt should be called when copyprop produces a != 1
> via substitute_and_fold:
>
> /* Replace real uses in the statement. */
> if (get_value_fn)
> did_replace |= replace_uses_in (stmt, get_value_fn);
>
> /* If we made a replacement, fold the statement. */
> if (did_replace)
> fold_stmt (&oldi);
Well, I added this transformation for test in fold-const s
fold_comparison function and still it doesn't get converted.
I assume this caused by the fact that we do this optimization in
forwprop on argument's of the comparison, so no try to fold statement
happens here at this place.
Kai
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-12 12:25 ` Kai Tietz
@ 2011-07-12 14:38 ` Richard Guenther
2011-07-19 12:08 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Richard Guenther @ 2011-07-12 14:38 UTC (permalink / raw)
To: Kai Tietz; +Cc: GCC Patches
On Tue, Jul 12, 2011 at 2:21 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
> 2011/7/12 Richard Guenther <richard.guenther@gmail.com>:
>> On Tue, Jul 12, 2011 at 11:48 AM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>> 2011/7/12 Richard Guenther <richard.guenther@gmail.com>:
>>>> On Mon, Jul 11, 2011 at 5:37 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>>> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>>>>>> On Fri, Jul 8, 2011 at 1:32 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>>>>> 2011/7/8 Richard Guenther <richard.guenther@gmail.com>:
>>>>>>>> On Thu, Jul 7, 2011 at 6:07 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>>>>>>> Hello,
>>>>>>>>>
>>>>>>>>> This patch - second of series - adds boolification of comparisions in
>>>>>>>>> gimplifier. For this
>>>>>>>>> casts from/to boolean are marked as not-useless. And in fold_unary_loc
>>>>>>>>> casts to non-boolean integral types are preserved.
>>>>>>>>> The hunk in tree-ssa-forwprop.c in combine_cond-expr_cond is not strictly
>>>>>>>>> necessary - as long as fold-const handles 1-bit precision bitwise-expression
>>>>>>>>> with truth-logic - but it has shown to short-cut some expensier folding. So
>>>>>>>>> I kept it within this patch.
>>>>>>>>
>>>>>>>> Please split it out. Also ...
>>>>>>>>
>>>>>>>>>
>>>>>>>>> The adjusted testcase gcc.dg/uninit-15.c indicates that due
>>>>>>>>> optimization we loose
>>>>>>>>> in this case variables declaration. But this might be to be expected.
>>>>>>>>>
>>>>>>>>> In vectorization we have a regression in gcc.dg/vect/vect-cond-3.c
>>>>>>>>> test-case. It's caused
>>>>>>>>> by always having boolean-type on conditions. So vectorizer sees
>>>>>>>>> different types, which
>>>>>>>>> aren't handled by vectorizer right now. Maybe this issue could be
>>>>>>>>> special-cased for
>>>>>>>>> boolean-types in tree-vect-loop, by making operand for used condition
>>>>>>>>> equal to vector-type.
>>>>>>>>> But this is a subject for a different patch and not addressed by this series.
>>>>>>>>>
>>>>>>>>> There is a regressions in tree-ssa/vrp47.c, and the fix is addressed
>>>>>>>>> by the 3rd patch of this
>>>>>>>>> series.
>>>>>>>>>
>>>>>>>>> Bootstrapped and regression tested for all standard-languages (plus
>>>>>>>>> Ada and Obj-C++) on host x86_64-pc-linux-gnu.
>>>>>>>>>
>>>>>>>>> Ok for apply?
>>>>>>>>>
>>>>>>>>> Regards,
>>>>>>>>> Kai
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> ChangeLog
>>>>>>>>>
>>>>>>>>> 2011-07-07 Kai Tietz <ktietz@redhat.com>
>>>>>>>>>
>>>>>>>>> * fold-const.c (fold_unary_loc): Preserve
>>>>>>>>> non-boolean-typed casts.
>>>>>>>>> * gimplify.c (gimple_boolify): Handle boolification
>>>>>>>>> of comparisons.
>>>>>>>>> (gimplify_expr): Boolifiy non aggregate-typed
>>>>>>>>> comparisons.
>>>>>>>>> * tree-cfg.c (verify_gimple_comparison): Check result
>>>>>>>>> type of comparison expression.
>>>>>>>>> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
>>>>>>>>> casts from/to boolean,
>>>>>>>>> * tree-ssa-forwprop.c (combine_cond_expr_cond): Add simplification
>>>>>>>>> support for one-bit-precision typed X for cases X != 0 and X == 0.
>>>>>>>>> (forward_propagate_comparison): Adjust test of condition
>>>>>>>>> result.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
>>>>>>>>> * gcc.dg/tree-ssa/pr21031.c: Likewise.
>>>>>>>>> * gcc.dg/tree-ssa/pr30978.c: Likewise.
>>>>>>>>> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
>>>>>>>>> * gcc.dg/binop-xor1.c: Mark it as expected fail.
>>>>>>>>> * gcc.dg/binop-xor3.c: Likewise.
>>>>>>>>> * gcc.dg/uninit-15.c: Adjust reported message.
>>>>>>>>>
>>>>>>>>> Index: gcc-head/gcc/fold-const.c
>>>>>>>>> ===================================================================
>>>>>>>>> --- gcc-head.orig/gcc/fold-const.c
>>>>>>>>> +++ gcc-head/gcc/fold-const.c
>>>>>>>>> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
>>>>>>>>> non-integral type.
>>>>>>>>> Do not fold the result as that would not simplify further, also
>>>>>>>>> folding again results in recursions. */
>>>>>>>>> - if (INTEGRAL_TYPE_P (type))
>>>>>>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>>>>>>> return build2_loc (loc, TREE_CODE (op0), type,
>>>>>>>>> TREE_OPERAND (op0, 0),
>>>>>>>>> TREE_OPERAND (op0, 1));
>>>>>>>>> - else
>>>>>>>>> + else if (!INTEGRAL_TYPE_P (type))
>>>>>>>>> return build3_loc (loc, COND_EXPR, type, op0,
>>>>>>>>> fold_convert (type, boolean_true_node),
>>>>>>>>> fold_convert (type, boolean_false_node));
>>>>>>>>> Index: gcc-head/gcc/gimplify.c
>>>>>>>>> ===================================================================
>>>>>>>>> --- gcc-head.orig/gcc/gimplify.c
>>>>>>>>> +++ gcc-head/gcc/gimplify.c
>>>>>>>>> @@ -2842,18 +2842,23 @@ gimple_boolify (tree expr)
>>>>>>>>>
>>>>>>>>> case TRUTH_NOT_EXPR:
>>>>>>>>> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
>>>>>>>>> - /* FALLTHRU */
>>>>>>>>>
>>>>>>>>> - case EQ_EXPR: case NE_EXPR:
>>>>>>>>> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
>>>>>>>>> /* These expressions always produce boolean results. */
>>>>>>>>> - TREE_TYPE (expr) = boolean_type_node;
>>>>>>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>>>>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>>>>>>> return expr;
>>>>>>>>>
>>>>>>>>> default:
>>>>>>>>> + if (COMPARISON_CLASS_P (expr))
>>>>>>>>> + {
>>>>>>>>> + /* There expressions always prduce boolean results. */
>>>>>>>>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>>>>>>>>> + TREE_TYPE (expr) = boolean_type_node;
>>>>>>>>> + return expr;
>>>>>>>>> + }
>>>>>>>>> /* Other expressions that get here must have boolean values, but
>>>>>>>>> might need to be converted to the appropriate mode. */
>>>>>>>>> - if (type == boolean_type_node)
>>>>>>>>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>>>>>>>>> return expr;
>>>>>>>>> return fold_convert_loc (loc, boolean_type_node, expr);
>>>>>>>>> }
>>>>>>>>> @@ -6763,7 +6768,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>>>>> tree org_type = TREE_TYPE (*expr_p);
>>>>>>>>>
>>>>>>>>> *expr_p = gimple_boolify (*expr_p);
>>>>>>>>> - if (org_type != boolean_type_node)
>>>>>>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>>>>>>> {
>>>>>>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>>>>>>
>>>>>>>> Use fold_convert_loc with saved_location
>>>>>>>
>>>>>>> Oh, good catch. Yes, I will adjust that.
>>>>>>>
>>>>>>>>> ret = GS_OK;
>>>>>>>>> @@ -7208,7 +7213,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>>>>> fold_truth_not_expr) happily uses operand type and doesn't
>>>>>>>>> automatically uses boolean_type as result, we need to keep
>>>>>>>>> orignal type. */
>>>>>>>>> - if (org_type != boolean_type_node)
>>>>>>>>> + if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p)))
>>>>>>>>> {
>>>>>>>>> *expr_p = fold_convert (org_type, *expr_p);
>>>>>>>>
>>>>>>>> Likewise. Maybe this fixes the diagnostic regression.
>>>>>>>>
>>>>>>>>> ret = GS_OK;
>>>>>>>>> @@ -7288,7 +7293,19 @@ gimplify_expr (tree *expr_p, gimple_seq
>>>>>>>>> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>>>>>>>>>
>>>>>>>>> if (!AGGREGATE_TYPE_P (type))
>>>>>>>>> - goto expr_2;
>>>>>>>>> + {
>>>>>>>>> + tree org_type = TREE_TYPE (*expr_p);
>>>>>>>>> + *expr_p = gimple_boolify (*expr_p);
>>>>>>>>> + if (!useless_type_conversion_p (org_type,
>>>>>>>>> + TREE_TYPE (*expr_p)))
>>>>>>>>> + {
>>>>>>>>> + *expr_p = fold_convert_loc (saved_location,
>>>>>>>>> + org_type, *expr_p);
>>>>>>>>> + ret = GS_OK;
>>>>>>>>> + }
>>>>>>>>> + else
>>>>>>>>> + goto expr_2;
>>>>>>>>> + }
>>>>>>>>> else if (TYPE_MODE (type) != BLKmode)
>>>>>>>>> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
>>>>>>>>> else
>>>>>>>>> Index: gcc-head/gcc/tree-cfg.c
>>>>>>>>> ===================================================================
>>>>>>>>> --- gcc-head.orig/gcc/tree-cfg.c
>>>>>>>>> +++ gcc-head/gcc/tree-cfg.c
>>>>>>>>> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
>>>>>>>>> && (!POINTER_TYPE_P (op0_type)
>>>>>>>>> || !POINTER_TYPE_P (op1_type)
>>>>>>>>> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
>>>>>>>>> - || !INTEGRAL_TYPE_P (type))
>>>>>>>>> + || !INTEGRAL_TYPE_P (type)
>>>>>>>>> + || (TREE_CODE (type) != BOOLEAN_TYPE
>>>>>>>>> + && TYPE_PRECISION (type) != 1))
>>>>>>>>> {
>>>>>>>>> error ("type mismatch in comparison expression");
>>>>>>>>> debug_generic_expr (type);
>>>>>>>>> Index: gcc-head/gcc/tree-ssa.c
>>>>>>>>> ===================================================================
>>>>>>>>> --- gcc-head.orig/gcc/tree-ssa.c
>>>>>>>>> +++ gcc-head/gcc/tree-ssa.c
>>>>>>>>> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
>>>>>>>>> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
>>>>>>>>> return false;
>>>>>>>>>
>>>>>>>>> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
>>>>>>>>> - one. */
>>>>>>>>> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
>>>>>>>>> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
>>>>>>>>> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
>>>>>>>>> + of precision one. */
>>>>>>>>> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
>>>>>>>>> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
>>>>>>>>> && TYPE_PRECISION (outer_type) != 1)
>>>>>>>>> return false;
>>>>>>>>>
>>>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>>>>> ===================================================================
>>>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>>>>>>>>> @@ -11,5 +11,5 @@ f (int i, float j)
>>>>>>>>>
>>>>>>>>> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
>>>>>>>>> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
>>>>>>>>> "forwprop1"} } */
>>>>>>>>> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
>>>>>>>>> "forwprop1"} } */
>>>>>>>>> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
>>>>>>>>> 1\);\n[^\n]*if} "forwprop1"} } */
>>>>>>>>
>>>>>>>> Hm? Why that?
>>>>>>>>
>>>>>>>>> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
>>>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>>>>> ===================================================================
>>>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>>>>>>>>> @@ -16,5 +16,5 @@ foo (int a)
>>>>>>>>> return 0;
>>>>>>>>> }
>>>>>>>>>
>>>>>>>>> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
>>>>>>>>> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
>>>>>>>>> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
>>>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>>>>> ===================================================================
>>>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>>>>>>>>> @@ -10,5 +10,5 @@ int foo(int a)
>>>>>>>>> return e;
>>>>>>>>> }
>>>>>>>>>
>>>>>>>>> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
>>>>>>>>> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
>>>>>>>>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>>>>>>>>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>>>>> ===================================================================
>>>>>>>>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>>>>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>>>>>>>>> @@ -2,5 +2,5 @@
>>>>>>>>> /* { dg-options "-O -fdump-tree-fre1-details" } */
>>>>>>>>>
>>>>>>>>> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
>>>>>>>>> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
>>>>>>>>> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
>>>>>>>>> /* { dg-final { cleanup-tree-dump "fre1" } } */
>>>>>>>>> Index: gcc-head/gcc/tree-ssa-forwprop.c
>>>>>>>>> ===================================================================
>>>>>>>>> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
>>>>>>>>> +++ gcc-head/gcc/tree-ssa-forwprop.c
>>>>>>>>> @@ -367,9 +367,61 @@ combine_cond_expr_cond (location_t loc,
>>>>>>>>> gcc_assert (TREE_CODE_CLASS (code) == tcc_comparison);
>>>>>>>>>
>>>>>>>>> t = fold_binary_loc (loc, code, type, op0, op1);
>>>>>>>>> +
>>>>>>>>> + if (!t && INTEGRAL_TYPE_P (TREE_TYPE (op1))
>>>>>>>>> + && TYPE_PRECISION (TREE_TYPE (op1)) == 1
>>>>>>>>> + && (code == EQ_EXPR || code == NE_EXPR))
>>>>>>>>> + {
>>>>>>>>> + if (TREE_CODE (op1) == INTEGER_CST)
>>>>>>>>> + {
>>>>>>>>> + if (integer_onep (op1))
>>>>>>>>> + {
>>>>>>>>> + op1 = fold_convert_loc (loc, TREE_TYPE (op1), integer_zero_node);
>>>>>>>>> + code = (code == NE_EXPR ? EQ_EXPR : NE_EXPR);
>>>>>>>>
>>>>>>>> So you change truthvalue !=/== 1 to truthvalue ==/!= 0 and then
>>>>>>>> recurse ... that doesn't make sense to me and is super-ugly.
>>>>>>>> What's the testcase that made you add all this code?
>>>>>>>
>>>>>>> Well, the convert from truthvalue !=/== 1 to !=/== 0 limits the amount
>>>>>>> of cases to handle. As for truthvalued X the we have then just to
>>>>>>> handle two cases. X != 0 -> X, and X == 0 -> (X ^ 1).
>>>>>>> The recursion is someting I saw as existing pattern (for the same
>>>>>>> thing) in truth-op folding in fold-const.
>>>>>>>
>>>>>>> Actual I can remove this optimization here, as it should be convered
>>>>>>> by VRP already (when VRP handles 1-bit precision bitwise ops proper).
>>>>>>
>>>>>> We should have a canonical form for those compares and change
>>>>>> them accordingly, best in fold_stmt.
>>>>>>
>>>>>> Richard.
>>>>>
>>>>> Hmm, I tried to add this code-pattern to fold_stmt, but for this kind
>>>>> of branch it seems not to be invoked at all. At least not now without
>>>>> boolification of compares. One nit I found for GIMPLE_BINARY, as here
>>>>> just patterns getting replaced, which have fewer number of ops then
>>>>> original statement. This check looks a bit bogus.
>>>>> For getting this normalization right now in a consistant way,
>>>>> fold-const might be right now the better place to handle this.
>>>>
>>>> It gets invoked (well, should get invoked) when anyone changes the
>>>> statement. If it is present in that form from the beginning then we
>>>> lack canonicalization in fold and/or gimplification.
>>>>
>>>> I suppose you have a testcase?
>>>>
>>>> Richard.
>>>>
>>>>> Regards,
>>>>> Kai
>>>>>
>>>
>>> Yes, testcase looks like this:
>>>
>>> int foo (_Bool a, _Bool b)
>>> {
>>> return a != ((b | !b));
>>> }
>>>
>>> while reduces to
>>> ...
>>> return a != 1; right now, and not a == 0 (as a is boolean)
>>
>> fold_stmt should be called when copyprop produces a != 1
>> via substitute_and_fold:
>>
>> /* Replace real uses in the statement. */
>> if (get_value_fn)
>> did_replace |= replace_uses_in (stmt, get_value_fn);
>>
>> /* If we made a replacement, fold the statement. */
>> if (did_replace)
>> fold_stmt (&oldi);
>
> Well, I added this transformation for test in fold-const s
> fold_comparison function and still it doesn't get converted.
> I assume this caused by the fact that we do this optimization in
> forwprop on argument's of the comparison, so no try to fold statement
> happens here at this place.
The non-canonical comparison appears after copyprop for me.
Richard.
> Kai
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-12 14:38 ` Richard Guenther
@ 2011-07-19 12:08 ` Kai Tietz
2011-07-19 12:16 ` Richard Guenther
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-19 12:08 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
Hello,
So this is the updated patch for boolifying of comparisons. There are
two different kind of regression caused by this. One is fixed by the
VRP patch I've sent and it waits for review. The other one is about
vectorization in gcc.dg/vect/vect-cond3.c
testcase. This is caused by vectorization pass, which can't handle
different types for vectorization, as now the conditions are always
boolean-typed.
ChangeLog
2011-07-19 Kai Tietz <ktietz@redhat.com>
* fold-const.c (fold_unary_loc): Preserve
non-boolean-typed casts.
* gimplify.c (gimple_boolify): Handle boolification
of comparisons.
(gimplify_expr): Boolifiy non aggregate-typed
comparisons.
* tree-cfg.c (verify_gimple_comparison): Check result
type of comparison expression.
* tree-ssa.c (useless_type_conversion_p): Preserve incompatible
casts from/to boolean,
* tree-ssa-forwprop.c (forward_propagate_comparison):
Adjust test of condition result and disallow type-cast
sinking into comparison.
* gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
* gcc.dg/tree-ssa/pr21031.c: Likewise.
* gcc.dg/tree-ssa/pr30978.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
* gcc.dg/binop-xor1.c: Mark it as expected fail.
* gcc.dg/binop-xor3.c: Likewise.
* gcc.dg/uninit-15.c: Adjust reported message.
Bootstrapped and regression tested for x86_64-pc-linux-gnu. Ok for apply?
Regards,
Kai
PS: Might be that due your recent patch to forwprop, that patch
doesn't apply here cleanly.
Index: gcc-head/gcc/fold-const.c
===================================================================
--- gcc-head.orig/gcc/fold-const.c
+++ gcc-head/gcc/fold-const.c
@@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
non-integral type.
Do not fold the result as that would not simplify further, also
folding again results in recursions. */
- if (INTEGRAL_TYPE_P (type))
+ if (TREE_CODE (type) == BOOLEAN_TYPE)
return build2_loc (loc, TREE_CODE (op0), type,
TREE_OPERAND (op0, 0),
TREE_OPERAND (op0, 1));
- else
+ else if (!INTEGRAL_TYPE_P (type))
return build3_loc (loc, COND_EXPR, type, op0,
fold_convert (type, boolean_true_node),
fold_convert (type, boolean_false_node));
Index: gcc-head/gcc/gimplify.c
===================================================================
--- gcc-head.orig/gcc/gimplify.c
+++ gcc-head/gcc/gimplify.c
@@ -2860,18 +2860,23 @@ gimple_boolify (tree expr)
case TRUTH_NOT_EXPR:
TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
- /* FALLTHRU */
- case EQ_EXPR: case NE_EXPR:
- case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
/* These expressions always produce boolean results. */
- TREE_TYPE (expr) = boolean_type_node;
+ if (TREE_CODE (type) != BOOLEAN_TYPE)
+ TREE_TYPE (expr) = boolean_type_node;
return expr;
default:
+ if (COMPARISON_CLASS_P (expr))
+ {
+ /* There expressions always prduce boolean results. */
+ if (TREE_CODE (type) != BOOLEAN_TYPE)
+ TREE_TYPE (expr) = boolean_type_node;
+ return expr;
+ }
/* Other expressions that get here must have boolean values, but
might need to be converted to the appropriate mode. */
- if (type == boolean_type_node)
+ if (TREE_CODE (type) == BOOLEAN_TYPE)
return expr;
return fold_convert_loc (loc, boolean_type_node, expr);
}
@@ -6791,7 +6796,7 @@ gimplify_expr (tree *expr_p, gimple_seq
*expr_p = gimple_boolify (*expr_p);
if (!useless_type_conversion_p (orig_type, TREE_TYPE (*expr_p)))
{
- *expr_p = fold_convert_loc (saved_location, orig_type, *expr_p);
+ *expr_p = fold_convert_loc (input_location, orig_type, *expr_p);
ret = GS_OK;
break;
}
@@ -7309,7 +7314,19 @@ gimplify_expr (tree *expr_p, gimple_seq
tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
if (!AGGREGATE_TYPE_P (type))
- goto expr_2;
+ {
+ tree org_type = TREE_TYPE (*expr_p);
+ *expr_p = gimple_boolify (*expr_p);
+ if (!useless_type_conversion_p (org_type,
+ TREE_TYPE (*expr_p)))
+ {
+ *expr_p = fold_convert_loc (input_location,
+ org_type, *expr_p);
+ ret = GS_OK;
+ }
+ else
+ goto expr_2;
+ }
else if (TYPE_MODE (type) != BLKmode)
ret = gimplify_scalar_mode_aggregate_compare (expr_p);
else
Index: gcc-head/gcc/tree-cfg.c
===================================================================
--- gcc-head.orig/gcc/tree-cfg.c
+++ gcc-head/gcc/tree-cfg.c
@@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
&& (!POINTER_TYPE_P (op0_type)
|| !POINTER_TYPE_P (op1_type)
|| TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
- || !INTEGRAL_TYPE_P (type))
+ || !INTEGRAL_TYPE_P (type)
+ || (TREE_CODE (type) != BOOLEAN_TYPE
+ && TYPE_PRECISION (type) != 1))
{
error ("type mismatch in comparison expression");
debug_generic_expr (type);
Index: gcc-head/gcc/tree-ssa.c
===================================================================
--- gcc-head.orig/gcc/tree-ssa.c
+++ gcc-head/gcc/tree-ssa.c
@@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
|| TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
return false;
- /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
- one. */
- if (TREE_CODE (inner_type) != BOOLEAN_TYPE
- && TREE_CODE (outer_type) == BOOLEAN_TYPE
+ /* Preserve conversions to/from BOOLEAN_TYPE if types are not
+ of precision one. */
+ if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
+ != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
&& TYPE_PRECISION (outer_type) != 1)
return false;
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
@@ -11,5 +11,5 @@ f (int i, float j)
/* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
"forwprop1"} } */
-/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
"forwprop1"} } */
+/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
1\);\n[^\n]*if} "forwprop1"} } */
/* { dg-final { cleanup-tree-dump "forwprop?" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
@@ -16,5 +16,5 @@ foo (int a)
return 0;
}
-/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
+/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
/* { dg-final { cleanup-tree-dump "forwprop1" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
@@ -10,5 +10,5 @@ int foo(int a)
return e;
}
-/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
+/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
@@ -2,5 +2,5 @@
/* { dg-options "-O -fdump-tree-fre1-details" } */
int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
-/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
+/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
/* { dg-final { cleanup-tree-dump "fre1" } } */
Index: gcc-head/gcc/tree-ssa-forwprop.c
===================================================================
--- gcc-head.orig/gcc/tree-ssa-forwprop.c
+++ gcc-head/gcc/tree-ssa-forwprop.c
@@ -1122,30 +1174,22 @@ forward_propagate_comparison (gimple stm
if (!use_stmt)
return false;
- /* Conversion of the condition result to another integral type. */
+ /* Test of the condition result. */
if (is_gimple_assign (use_stmt)
- && (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (use_stmt))
- || TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
- == tcc_comparison
- || gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR)
- && INTEGRAL_TYPE_P (TREE_TYPE (gimple_assign_lhs (use_stmt))))
+ && ((TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
+ == tcc_comparison)
+ || gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR
+ || (gimple_assign_rhs_code (use_stmt) == BIT_NOT_EXPR
+ && TYPE_PRECISION (TREE_TYPE (gimple_assign_lhs (use_stmt))))))
{
tree lhs = gimple_assign_lhs (use_stmt);
- /* We can propagate the condition into a conversion. */
- if (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (use_stmt)))
- {
- /* Avoid using fold here as that may create a COND_EXPR with
- non-boolean condition as canonical form. */
- tmp = build2 (gimple_assign_rhs_code (stmt), TREE_TYPE (lhs),
- gimple_assign_rhs1 (stmt), gimple_assign_rhs2 (stmt));
- }
/* We can propagate the condition into X op CST where op
is EQ_EXPR or NE_EXPR and CST is either one or zero. */
- else if (TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
- == tcc_comparison
- && TREE_CODE (gimple_assign_rhs1 (use_stmt)) == SSA_NAME
- && TREE_CODE (gimple_assign_rhs2 (use_stmt)) == INTEGER_CST)
+ if (TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
+ == tcc_comparison
+ && TREE_CODE (gimple_assign_rhs1 (use_stmt)) == SSA_NAME
+ && TREE_CODE (gimple_assign_rhs2 (use_stmt)) == INTEGER_CST)
{
enum tree_code code = gimple_assign_rhs_code (use_stmt);
tree cst = gimple_assign_rhs2 (use_stmt);
@@ -1164,7 +1208,8 @@ forward_propagate_comparison (gimple stm
}
/* We can propagate the condition into a statement that
computes the logical negation of the comparison result. */
- else if (gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR)
+ else if (gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR
+ || gimple_assign_rhs_code (use_stmt) == BIT_NOT_EXPR)
{
tree type = TREE_TYPE (gimple_assign_rhs1 (stmt));
bool nans = HONOR_NANS (TYPE_MODE (type));
@@ -1810,6 +1855,7 @@ simplify_bitwise_binary (gimple_stmt_ite
arg2));
tem = make_ssa_name (tem, newop);
gimple_assign_set_lhs (newop, tem);
+ gimple_set_location (newop, gimple_location (stmt));
gsi_insert_before (gsi, newop, GSI_SAME_STMT);
gimple_assign_set_rhs_with_ops_1 (gsi, NOP_EXPR,
tem, NULL_TREE, NULL_TREE);
@@ -1839,6 +1885,7 @@ simplify_bitwise_binary (gimple_stmt_ite
newop = gimple_build_assign_with_ops (code, tem, def1_arg1, def2_arg1);
tem = make_ssa_name (tem, newop);
gimple_assign_set_lhs (newop, tem);
+ gimple_set_location (newop, gimple_location (stmt));
gsi_insert_before (gsi, newop, GSI_SAME_STMT);
gimple_assign_set_rhs_with_ops_1 (gsi, NOP_EXPR,
tem, NULL_TREE, NULL_TREE);
@@ -1867,6 +1914,7 @@ simplify_bitwise_binary (gimple_stmt_ite
tem, def1_arg1, arg2);
tem = make_ssa_name (tem, newop);
gimple_assign_set_lhs (newop, tem);
+ gimple_set_location (newop, gimple_location (stmt));
/* Make sure to re-process the new stmt as it's walking upwards. */
gsi_insert_before (gsi, newop, GSI_NEW_STMT);
gimple_assign_set_rhs1 (stmt, tem);
Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor1.c
+++ gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
@@ -7,8 +7,5 @@ foo (int a, int b, int c)
return ((a && !b && c) || (!a && b && c));
}
-/* We expect to see "<bb N>"; confirm that, so that we know to count
- it in the real test. */
-/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 5 "optimized" } } */
-/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
*-*-* } } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor3.c
+++ gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
@@ -7,8 +7,5 @@ foo (int a, int b)
return ((a && !b) || (!a && b));
}
-/* We expect to see "<bb N>"; confirm that, so that we know to count
- it in the real test. */
-/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 1 "optimized" } } */
-/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
*-*-* } } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/uninit-15.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/uninit-15.c
+++ gcc-head/gcc/testsuite/gcc.dg/uninit-15.c
@@ -18,9 +18,9 @@ foo (int i)
void baz (void);
void
-bar (void)
+bar (void) /* { dg-warning "'j' is used uninitialized" } */
{
int j; /* { dg-message "note: 'j' was declared here" "" { xfail *-*-* } } */
- for (; foo (j); ++j) /* { dg-warning "'j' is used uninitialized" } */
+ for (; foo (j); ++j)
baz ();
}
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-19 12:08 ` Kai Tietz
@ 2011-07-19 12:16 ` Richard Guenther
2011-07-19 22:24 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Richard Guenther @ 2011-07-19 12:16 UTC (permalink / raw)
To: Kai Tietz; +Cc: GCC Patches
On Tue, Jul 19, 2011 at 1:27 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
> Hello,
>
> So this is the updated patch for boolifying of comparisons. There are
> two different kind of regression caused by this. One is fixed by the
> VRP patch I've sent and it waits for review. The other one is about
> vectorization in gcc.dg/vect/vect-cond3.c
> testcase. This is caused by vectorization pass, which can't handle
> different types for vectorization, as now the conditions are always
> boolean-typed.
>
> ChangeLog
>
> 2011-07-19 Kai Tietz <ktietz@redhat.com>
>
> * fold-const.c (fold_unary_loc): Preserve
> non-boolean-typed casts.
> * gimplify.c (gimple_boolify): Handle boolification
> of comparisons.
> (gimplify_expr): Boolifiy non aggregate-typed
> comparisons.
> * tree-cfg.c (verify_gimple_comparison): Check result
> type of comparison expression.
> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
> casts from/to boolean,
> * tree-ssa-forwprop.c (forward_propagate_comparison):
> Adjust test of condition result and disallow type-cast
> sinking into comparison.
>
>
> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
> * gcc.dg/tree-ssa/pr21031.c: Likewise.
> * gcc.dg/tree-ssa/pr30978.c: Likewise.
> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
> * gcc.dg/binop-xor1.c: Mark it as expected fail.
> * gcc.dg/binop-xor3.c: Likewise.
> * gcc.dg/uninit-15.c: Adjust reported message.
>
> Bootstrapped and regression tested for x86_64-pc-linux-gnu. Ok for apply?
Please test and commit the fold-const.c and tree-ssa.c parts separately,
they are pre-approved if they pass separate testing.
I think
> * gcc.dg/uninit-15.c: Adjust reported message.
is a bogus change. Please figure out why you need it.
Likewise the builtin-expect-5.c change.
> Regards,
> Kai
>
> PS: Might be that due your recent patch to forwprop, that patch
> doesn't apply here cleanly.
You will need to re-test ontop of that patch anyway I guess.
And deal with the gcc.dg/vect/vect-cond3.c fail.
Richard.
> Index: gcc-head/gcc/fold-const.c
> ===================================================================
> --- gcc-head.orig/gcc/fold-const.c
> +++ gcc-head/gcc/fold-const.c
> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
> non-integral type.
> Do not fold the result as that would not simplify further, also
> folding again results in recursions. */
> - if (INTEGRAL_TYPE_P (type))
> + if (TREE_CODE (type) == BOOLEAN_TYPE)
> return build2_loc (loc, TREE_CODE (op0), type,
> TREE_OPERAND (op0, 0),
> TREE_OPERAND (op0, 1));
> - else
> + else if (!INTEGRAL_TYPE_P (type))
> return build3_loc (loc, COND_EXPR, type, op0,
> fold_convert (type, boolean_true_node),
> fold_convert (type, boolean_false_node));
> Index: gcc-head/gcc/gimplify.c
> ===================================================================
> --- gcc-head.orig/gcc/gimplify.c
> +++ gcc-head/gcc/gimplify.c
> @@ -2860,18 +2860,23 @@ gimple_boolify (tree expr)
>
> case TRUTH_NOT_EXPR:
> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
> - /* FALLTHRU */
>
> - case EQ_EXPR: case NE_EXPR:
> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
> /* These expressions always produce boolean results. */
> - TREE_TYPE (expr) = boolean_type_node;
> + if (TREE_CODE (type) != BOOLEAN_TYPE)
> + TREE_TYPE (expr) = boolean_type_node;
> return expr;
>
> default:
> + if (COMPARISON_CLASS_P (expr))
> + {
> + /* There expressions always prduce boolean results. */
> + if (TREE_CODE (type) != BOOLEAN_TYPE)
> + TREE_TYPE (expr) = boolean_type_node;
> + return expr;
> + }
> /* Other expressions that get here must have boolean values, but
> might need to be converted to the appropriate mode. */
> - if (type == boolean_type_node)
> + if (TREE_CODE (type) == BOOLEAN_TYPE)
> return expr;
> return fold_convert_loc (loc, boolean_type_node, expr);
> }
> @@ -6791,7 +6796,7 @@ gimplify_expr (tree *expr_p, gimple_seq
> *expr_p = gimple_boolify (*expr_p);
> if (!useless_type_conversion_p (orig_type, TREE_TYPE (*expr_p)))
> {
> - *expr_p = fold_convert_loc (saved_location, orig_type, *expr_p);
> + *expr_p = fold_convert_loc (input_location, orig_type, *expr_p);
> ret = GS_OK;
> break;
> }
> @@ -7309,7 +7314,19 @@ gimplify_expr (tree *expr_p, gimple_seq
> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>
> if (!AGGREGATE_TYPE_P (type))
> - goto expr_2;
> + {
> + tree org_type = TREE_TYPE (*expr_p);
> + *expr_p = gimple_boolify (*expr_p);
> + if (!useless_type_conversion_p (org_type,
> + TREE_TYPE (*expr_p)))
> + {
> + *expr_p = fold_convert_loc (input_location,
> + org_type, *expr_p);
> + ret = GS_OK;
> + }
> + else
> + goto expr_2;
> + }
> else if (TYPE_MODE (type) != BLKmode)
> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
> else
> Index: gcc-head/gcc/tree-cfg.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-cfg.c
> +++ gcc-head/gcc/tree-cfg.c
> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
> && (!POINTER_TYPE_P (op0_type)
> || !POINTER_TYPE_P (op1_type)
> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
> - || !INTEGRAL_TYPE_P (type))
> + || !INTEGRAL_TYPE_P (type)
> + || (TREE_CODE (type) != BOOLEAN_TYPE
> + && TYPE_PRECISION (type) != 1))
> {
> error ("type mismatch in comparison expression");
> debug_generic_expr (type);
> Index: gcc-head/gcc/tree-ssa.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-ssa.c
> +++ gcc-head/gcc/tree-ssa.c
> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
> return false;
>
> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
> - one. */
> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
> + of precision one. */
> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
> && TYPE_PRECISION (outer_type) != 1)
> return false;
>
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
> @@ -11,5 +11,5 @@ f (int i, float j)
>
> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
> "forwprop1"} } */
> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
> "forwprop1"} } */
> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
> 1\);\n[^\n]*if} "forwprop1"} } */
> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
> @@ -16,5 +16,5 @@ foo (int a)
> return 0;
> }
>
> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
> @@ -10,5 +10,5 @@ int foo(int a)
> return e;
> }
>
> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
> @@ -2,5 +2,5 @@
> /* { dg-options "-O -fdump-tree-fre1-details" } */
>
> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
> /* { dg-final { cleanup-tree-dump "fre1" } } */
> Index: gcc-head/gcc/tree-ssa-forwprop.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
> +++ gcc-head/gcc/tree-ssa-forwprop.c
> @@ -1122,30 +1174,22 @@ forward_propagate_comparison (gimple stm
> if (!use_stmt)
> return false;
>
> - /* Conversion of the condition result to another integral type. */
> + /* Test of the condition result. */
> if (is_gimple_assign (use_stmt)
> - && (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (use_stmt))
> - || TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
> - == tcc_comparison
> - || gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR)
> - && INTEGRAL_TYPE_P (TREE_TYPE (gimple_assign_lhs (use_stmt))))
> + && ((TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
> + == tcc_comparison)
> + || gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR
> + || (gimple_assign_rhs_code (use_stmt) == BIT_NOT_EXPR
> + && TYPE_PRECISION (TREE_TYPE (gimple_assign_lhs (use_stmt))))))
> {
> tree lhs = gimple_assign_lhs (use_stmt);
>
> - /* We can propagate the condition into a conversion. */
> - if (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (use_stmt)))
> - {
> - /* Avoid using fold here as that may create a COND_EXPR with
> - non-boolean condition as canonical form. */
> - tmp = build2 (gimple_assign_rhs_code (stmt), TREE_TYPE (lhs),
> - gimple_assign_rhs1 (stmt), gimple_assign_rhs2 (stmt));
> - }
> /* We can propagate the condition into X op CST where op
> is EQ_EXPR or NE_EXPR and CST is either one or zero. */
> - else if (TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
> - == tcc_comparison
> - && TREE_CODE (gimple_assign_rhs1 (use_stmt)) == SSA_NAME
> - && TREE_CODE (gimple_assign_rhs2 (use_stmt)) == INTEGER_CST)
> + if (TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
> + == tcc_comparison
> + && TREE_CODE (gimple_assign_rhs1 (use_stmt)) == SSA_NAME
> + && TREE_CODE (gimple_assign_rhs2 (use_stmt)) == INTEGER_CST)
> {
> enum tree_code code = gimple_assign_rhs_code (use_stmt);
> tree cst = gimple_assign_rhs2 (use_stmt);
> @@ -1164,7 +1208,8 @@ forward_propagate_comparison (gimple stm
> }
> /* We can propagate the condition into a statement that
> computes the logical negation of the comparison result. */
> - else if (gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR)
> + else if (gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR
> + || gimple_assign_rhs_code (use_stmt) == BIT_NOT_EXPR)
> {
> tree type = TREE_TYPE (gimple_assign_rhs1 (stmt));
> bool nans = HONOR_NANS (TYPE_MODE (type));
> @@ -1810,6 +1855,7 @@ simplify_bitwise_binary (gimple_stmt_ite
> arg2));
> tem = make_ssa_name (tem, newop);
> gimple_assign_set_lhs (newop, tem);
> + gimple_set_location (newop, gimple_location (stmt));
> gsi_insert_before (gsi, newop, GSI_SAME_STMT);
> gimple_assign_set_rhs_with_ops_1 (gsi, NOP_EXPR,
> tem, NULL_TREE, NULL_TREE);
> @@ -1839,6 +1885,7 @@ simplify_bitwise_binary (gimple_stmt_ite
> newop = gimple_build_assign_with_ops (code, tem, def1_arg1, def2_arg1);
> tem = make_ssa_name (tem, newop);
> gimple_assign_set_lhs (newop, tem);
> + gimple_set_location (newop, gimple_location (stmt));
> gsi_insert_before (gsi, newop, GSI_SAME_STMT);
> gimple_assign_set_rhs_with_ops_1 (gsi, NOP_EXPR,
> tem, NULL_TREE, NULL_TREE);
> @@ -1867,6 +1914,7 @@ simplify_bitwise_binary (gimple_stmt_ite
> tem, def1_arg1, arg2);
> tem = make_ssa_name (tem, newop);
> gimple_assign_set_lhs (newop, tem);
> + gimple_set_location (newop, gimple_location (stmt));
> /* Make sure to re-process the new stmt as it's walking upwards. */
> gsi_insert_before (gsi, newop, GSI_NEW_STMT);
> gimple_assign_set_rhs1 (stmt, tem);
> Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor1.c
> +++ gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
> @@ -7,8 +7,5 @@ foo (int a, int b, int c)
> return ((a && !b && c) || (!a && b && c));
> }
>
> -/* We expect to see "<bb N>"; confirm that, so that we know to count
> - it in the real test. */
> -/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 5 "optimized" } } */
> -/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
> +/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
> *-*-* } } } */
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor3.c
> +++ gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
> @@ -7,8 +7,5 @@ foo (int a, int b)
> return ((a && !b) || (!a && b));
> }
>
> -/* We expect to see "<bb N>"; confirm that, so that we know to count
> - it in the real test. */
> -/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 1 "optimized" } } */
> -/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
> +/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
> *-*-* } } } */
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/uninit-15.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/uninit-15.c
> +++ gcc-head/gcc/testsuite/gcc.dg/uninit-15.c
> @@ -18,9 +18,9 @@ foo (int i)
> void baz (void);
>
> void
> -bar (void)
> +bar (void) /* { dg-warning "'j' is used uninitialized" } */
> {
> int j; /* { dg-message "note: 'j' was declared here" "" { xfail *-*-* } } */
> - for (; foo (j); ++j) /* { dg-warning "'j' is used uninitialized" } */
> + for (; foo (j); ++j)
> baz ();
> }
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-19 12:16 ` Richard Guenther
@ 2011-07-19 22:24 ` Kai Tietz
2011-07-20 13:32 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-19 22:24 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
2011/7/19 Richard Guenther <richard.guenther@gmail.com>:
> On Tue, Jul 19, 2011 at 1:27 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>> Hello,
>>
>> So this is the updated patch for boolifying of comparisons. There are
>> two different kind of regression caused by this. One is fixed by the
>> VRP patch I've sent and it waits for review. The other one is about
>> vectorization in gcc.dg/vect/vect-cond3.c
>> testcase. This is caused by vectorization pass, which can't handle
>> different types for vectorization, as now the conditions are always
>> boolean-typed.
>>
>> ChangeLog
>>
>> 2011-07-19 Kai Tietz <ktietz@redhat.com>
>>
>> * fold-const.c (fold_unary_loc): Preserve
>> non-boolean-typed casts.
>> * gimplify.c (gimple_boolify): Handle boolification
>> of comparisons.
>> (gimplify_expr): Boolifiy non aggregate-typed
>> comparisons.
>> * tree-cfg.c (verify_gimple_comparison): Check result
>> type of comparison expression.
>> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
>> casts from/to boolean,
>> * tree-ssa-forwprop.c (forward_propagate_comparison):
>> Adjust test of condition result and disallow type-cast
>> sinking into comparison.
>>
>>
>> * gcc.dg/tree-ssa/builtin-expect-5.c: Adjusted.
>> * gcc.dg/tree-ssa/pr21031.c: Likewise.
>> * gcc.dg/tree-ssa/pr30978.c: Likewise.
>> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
>> * gcc.dg/binop-xor1.c: Mark it as expected fail.
>> * gcc.dg/binop-xor3.c: Likewise.
>> * gcc.dg/uninit-15.c: Adjust reported message.
>>
>> Bootstrapped and regression tested for x86_64-pc-linux-gnu. Ok for apply?
>
> Please test and commit the fold-const.c and tree-ssa.c parts separately,
> they are pre-approved if they pass separate testing.
>
> I think
>
>> * gcc.dg/uninit-15.c: Adjust reported message.
>
> is a bogus change. Please figure out why you need it.
Well, somewhere the location for statement gets lost. I was searching
for the cause already some time and figured out it must be related to
some folding, which occures just by this type-preserving and might be
caused by some code using build2/3 instead of the build2/3_loc
variant. This was the cause why I added here to some foldings the
location preserving.
I tested this with just the approved part and see that this regression
occures already here.
> Likewise the builtin-expect-5.c change.
This I will address in my next patch for the approved part. This is
caused by the folding for builtin_expect in builtins.c. It gets
confused about type-casts on arguments for ANDIF/ORIF AFAICS.
>> Regards,
>> Kai
>>
>> PS: Might be that due your recent patch to forwprop, that patch
>> doesn't apply here cleanly.
>
> You will need to re-test ontop of that patch anyway I guess.
>
> And deal with the gcc.dg/vect/vect-cond3.c fail.
Well, this regression is caused by vectorizer inability to fold things
with two different types. It finds here a pattern with types
'int,int,_Bool,_Bool'. As by this patch conditions have always just
boolean-type. So this regression shows more a missing feature in
vectorizer.
I tested here some approachs to solve this, but I didn't found an easy
way to solve this until now.
> Richard.
>
>> Index: gcc-head/gcc/fold-const.c
>> ===================================================================
>> --- gcc-head.orig/gcc/fold-const.c
>> +++ gcc-head/gcc/fold-const.c
>> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
>> non-integral type.
>> Do not fold the result as that would not simplify further, also
>> folding again results in recursions. */
>> - if (INTEGRAL_TYPE_P (type))
>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>> return build2_loc (loc, TREE_CODE (op0), type,
>> TREE_OPERAND (op0, 0),
>> TREE_OPERAND (op0, 1));
>> - else
>> + else if (!INTEGRAL_TYPE_P (type))
>> return build3_loc (loc, COND_EXPR, type, op0,
>> fold_convert (type, boolean_true_node),
>> fold_convert (type, boolean_false_node));
>> Index: gcc-head/gcc/gimplify.c
>> ===================================================================
>> --- gcc-head.orig/gcc/gimplify.c
>> +++ gcc-head/gcc/gimplify.c
>> @@ -2860,18 +2860,23 @@ gimple_boolify (tree expr)
>>
>> case TRUTH_NOT_EXPR:
>> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
>> - /* FALLTHRU */
>>
>> - case EQ_EXPR: case NE_EXPR:
>> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
>> /* These expressions always produce boolean results. */
>> - TREE_TYPE (expr) = boolean_type_node;
>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>> + TREE_TYPE (expr) = boolean_type_node;
>> return expr;
>>
>> default:
>> + if (COMPARISON_CLASS_P (expr))
>> + {
>> + /* There expressions always prduce boolean results. */
>> + if (TREE_CODE (type) != BOOLEAN_TYPE)
>> + TREE_TYPE (expr) = boolean_type_node;
>> + return expr;
>> + }
>> /* Other expressions that get here must have boolean values, but
>> might need to be converted to the appropriate mode. */
>> - if (type == boolean_type_node)
>> + if (TREE_CODE (type) == BOOLEAN_TYPE)
>> return expr;
>> return fold_convert_loc (loc, boolean_type_node, expr);
>> }
>> @@ -6791,7 +6796,7 @@ gimplify_expr (tree *expr_p, gimple_seq
>> *expr_p = gimple_boolify (*expr_p);
>> if (!useless_type_conversion_p (orig_type, TREE_TYPE (*expr_p)))
>> {
>> - *expr_p = fold_convert_loc (saved_location, orig_type, *expr_p);
>> + *expr_p = fold_convert_loc (input_location, orig_type, *expr_p);
>> ret = GS_OK;
>> break;
>> }
>> @@ -7309,7 +7314,19 @@ gimplify_expr (tree *expr_p, gimple_seq
>> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>>
>> if (!AGGREGATE_TYPE_P (type))
>> - goto expr_2;
>> + {
>> + tree org_type = TREE_TYPE (*expr_p);
>> + *expr_p = gimple_boolify (*expr_p);
>> + if (!useless_type_conversion_p (org_type,
>> + TREE_TYPE (*expr_p)))
>> + {
>> + *expr_p = fold_convert_loc (input_location,
>> + org_type, *expr_p);
>> + ret = GS_OK;
>> + }
>> + else
>> + goto expr_2;
>> + }
>> else if (TYPE_MODE (type) != BLKmode)
>> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
>> else
>> Index: gcc-head/gcc/tree-cfg.c
>> ===================================================================
>> --- gcc-head.orig/gcc/tree-cfg.c
>> +++ gcc-head/gcc/tree-cfg.c
>> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
>> && (!POINTER_TYPE_P (op0_type)
>> || !POINTER_TYPE_P (op1_type)
>> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
>> - || !INTEGRAL_TYPE_P (type))
>> + || !INTEGRAL_TYPE_P (type)
>> + || (TREE_CODE (type) != BOOLEAN_TYPE
>> + && TYPE_PRECISION (type) != 1))
>> {
>> error ("type mismatch in comparison expression");
>> debug_generic_expr (type);
>> Index: gcc-head/gcc/tree-ssa.c
>> ===================================================================
>> --- gcc-head.orig/gcc/tree-ssa.c
>> +++ gcc-head/gcc/tree-ssa.c
>> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
>> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
>> return false;
>>
>> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
>> - one. */
>> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
>> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
>> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
>> + of precision one. */
>> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
>> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
>> && TYPE_PRECISION (outer_type) != 1)
>> return false;
>>
>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/builtin-expect-5.c
>> @@ -11,5 +11,5 @@ f (int i, float j)
>>
>> /* { dg-final { scan-tree-dump-times { if } 2 "forwprop1"} } */
>> /* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 0\);\n[^\n]*if}
>> "forwprop1"} } */
>> -/* { dg-final { scan-tree-dump {builtin_expect[^\n]*, 1\);\n[^\n]*if}
>> "forwprop1"} } */
>> +/* { dg-final { scan-tree-dump-not {builtin_expect[^\n]*,
>> 1\);\n[^\n]*if} "forwprop1"} } */
>> /* { dg-final { cleanup-tree-dump "forwprop?" } } */
>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
>> @@ -16,5 +16,5 @@ foo (int a)
>> return 0;
>> }
>>
>> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
>> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
>> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
>> @@ -10,5 +10,5 @@ int foo(int a)
>> return e;
>> }
>>
>> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
>> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
>> @@ -2,5 +2,5 @@
>> /* { dg-options "-O -fdump-tree-fre1-details" } */
>>
>> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
>> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
>> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
>> /* { dg-final { cleanup-tree-dump "fre1" } } */
>> Index: gcc-head/gcc/tree-ssa-forwprop.c
>> ===================================================================
>> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
>> +++ gcc-head/gcc/tree-ssa-forwprop.c
>> @@ -1122,30 +1174,22 @@ forward_propagate_comparison (gimple stm
>> if (!use_stmt)
>> return false;
>>
>> - /* Conversion of the condition result to another integral type. */
>> + /* Test of the condition result. */
>> if (is_gimple_assign (use_stmt)
>> - && (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (use_stmt))
>> - || TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
>> - == tcc_comparison
>> - || gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR)
>> - && INTEGRAL_TYPE_P (TREE_TYPE (gimple_assign_lhs (use_stmt))))
>> + && ((TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
>> + == tcc_comparison)
>> + || gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR
>> + || (gimple_assign_rhs_code (use_stmt) == BIT_NOT_EXPR
>> + && TYPE_PRECISION (TREE_TYPE (gimple_assign_lhs (use_stmt))))))
>> {
>> tree lhs = gimple_assign_lhs (use_stmt);
>>
>> - /* We can propagate the condition into a conversion. */
>> - if (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (use_stmt)))
>> - {
>> - /* Avoid using fold here as that may create a COND_EXPR with
>> - non-boolean condition as canonical form. */
>> - tmp = build2 (gimple_assign_rhs_code (stmt), TREE_TYPE (lhs),
>> - gimple_assign_rhs1 (stmt), gimple_assign_rhs2 (stmt));
>> - }
>> /* We can propagate the condition into X op CST where op
>> is EQ_EXPR or NE_EXPR and CST is either one or zero. */
>> - else if (TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
>> - == tcc_comparison
>> - && TREE_CODE (gimple_assign_rhs1 (use_stmt)) == SSA_NAME
>> - && TREE_CODE (gimple_assign_rhs2 (use_stmt)) == INTEGER_CST)
>> + if (TREE_CODE_CLASS (gimple_assign_rhs_code (use_stmt))
>> + == tcc_comparison
>> + && TREE_CODE (gimple_assign_rhs1 (use_stmt)) == SSA_NAME
>> + && TREE_CODE (gimple_assign_rhs2 (use_stmt)) == INTEGER_CST)
>> {
>> enum tree_code code = gimple_assign_rhs_code (use_stmt);
>> tree cst = gimple_assign_rhs2 (use_stmt);
>> @@ -1164,7 +1208,8 @@ forward_propagate_comparison (gimple stm
>> }
>> /* We can propagate the condition into a statement that
>> computes the logical negation of the comparison result. */
>> - else if (gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR)
>> + else if (gimple_assign_rhs_code (use_stmt) == TRUTH_NOT_EXPR
>> + || gimple_assign_rhs_code (use_stmt) == BIT_NOT_EXPR)
>> {
>> tree type = TREE_TYPE (gimple_assign_rhs1 (stmt));
>> bool nans = HONOR_NANS (TYPE_MODE (type));
>> @@ -1810,6 +1855,7 @@ simplify_bitwise_binary (gimple_stmt_ite
>> arg2));
>> tem = make_ssa_name (tem, newop);
>> gimple_assign_set_lhs (newop, tem);
>> + gimple_set_location (newop, gimple_location (stmt));
>> gsi_insert_before (gsi, newop, GSI_SAME_STMT);
>> gimple_assign_set_rhs_with_ops_1 (gsi, NOP_EXPR,
>> tem, NULL_TREE, NULL_TREE);
>> @@ -1839,6 +1885,7 @@ simplify_bitwise_binary (gimple_stmt_ite
>> newop = gimple_build_assign_with_ops (code, tem, def1_arg1, def2_arg1);
>> tem = make_ssa_name (tem, newop);
>> gimple_assign_set_lhs (newop, tem);
>> + gimple_set_location (newop, gimple_location (stmt));
>> gsi_insert_before (gsi, newop, GSI_SAME_STMT);
>> gimple_assign_set_rhs_with_ops_1 (gsi, NOP_EXPR,
>> tem, NULL_TREE, NULL_TREE);
>> @@ -1867,6 +1914,7 @@ simplify_bitwise_binary (gimple_stmt_ite
>> tem, def1_arg1, arg2);
>> tem = make_ssa_name (tem, newop);
>> gimple_assign_set_lhs (newop, tem);
>> + gimple_set_location (newop, gimple_location (stmt));
>> /* Make sure to re-process the new stmt as it's walking upwards. */
>> gsi_insert_before (gsi, newop, GSI_NEW_STMT);
>> gimple_assign_set_rhs1 (stmt, tem);
>> Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor1.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
>> @@ -7,8 +7,5 @@ foo (int a, int b, int c)
>> return ((a && !b && c) || (!a && b && c));
>> }
>>
>> -/* We expect to see "<bb N>"; confirm that, so that we know to count
>> - it in the real test. */
>> -/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 5 "optimized" } } */
>> -/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
>> +/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
>> *-*-* } } } */
>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>> Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor3.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
>> @@ -7,8 +7,5 @@ foo (int a, int b)
>> return ((a && !b) || (!a && b));
>> }
>>
>> -/* We expect to see "<bb N>"; confirm that, so that we know to count
>> - it in the real test. */
>> -/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 1 "optimized" } } */
>> -/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
>> +/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
>> *-*-* } } } */
>> /* { dg-final { cleanup-tree-dump "optimized" } } */
>> Index: gcc-head/gcc/testsuite/gcc.dg/uninit-15.c
>> ===================================================================
>> --- gcc-head.orig/gcc/testsuite/gcc.dg/uninit-15.c
>> +++ gcc-head/gcc/testsuite/gcc.dg/uninit-15.c
>> @@ -18,9 +18,9 @@ foo (int i)
>> void baz (void);
>>
>> void
>> -bar (void)
>> +bar (void) /* { dg-warning "'j' is used uninitialized" } */
>> {
>> int j; /* { dg-message "note: 'j' was declared here" "" { xfail *-*-* } } */
>> - for (; foo (j); ++j) /* { dg-warning "'j' is used uninitialized" } */
>> + for (; foo (j); ++j)
>> baz ();
>> }
>>
>
--
| (\_/) This is Bunny. Copy and paste
| (='.'=) Bunny into your signature to help
| (")_(") him gain world domination
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-19 22:24 ` Kai Tietz
@ 2011-07-20 13:32 ` Kai Tietz
2011-07-20 13:41 ` Richard Guenther
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-20 13:32 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
Hello,
this is the revised version of the partial pre-approved patch for preserving
type-casts from/to boolean-types. It fixes additionally the regression in
tree-ssa/builtin-expect-5.c testcase, which was caused by fold_builtin_expect.
Additionally there was a regression in gcc.dg/pr28685-1.c, which is fixed by
the change in tree-ssa-forwprop.c's function simplify_bitwise_binary. This
is just temporary necessary. As soon as we are boolifying comparisons in
gimplifier, the pattern-matching in tree-ssa-reassoc will match for 2
branched cases
again and we can remove the hunk from forward-propagation again.
2011-07-20 Kai Tietz <ktietz@redhat.com>
* fold-const.c (fold_unary_loc): Preserve
non-boolean-typed casts.
* tree-ssa.c (useless_type_conversion_p): Preserve incompatible
casts from/to boolean,
* builtins.c (fold_builtin_expect): See through the cast
from truthvalue_type_node to long.
* tree-ssa-forwprop.c (simplify_bitwise_binary): Add
simplification for CMP bitwise-binary CMP.
Bootstrapped and regression tested for all standard languages plus Ada
and Obj-C++ on
host x86_64-pc-linux-gnu. Ok for apply?
2011-07-20 Kai Tietz <ktietz@redhat.com>
* gcc.dg/binop-xor1.c: Mark it as expected fail.
* gcc.dg/binop-xor3.c: Likewise.
Index: gcc-head/gcc/builtins.c
===================================================================
--- gcc-head.orig/gcc/builtins.c
+++ gcc-head/gcc/builtins.c
@@ -6264,13 +6264,22 @@ build_builtin_expect_predicate (location
static tree
fold_builtin_expect (location_t loc, tree arg0, tree arg1)
{
- tree inner, fndecl;
+ tree inner, fndecl, inner_arg0;
enum tree_code code;
+ /* Distribute the expected value over short-circuiting operators.
+ See through the cast from truthvalue_type_node to long. */
+ inner_arg0 = arg0;
+ while (TREE_CODE (inner_arg0) == NOP_EXPR
+ && INTEGRAL_TYPE_P (TREE_TYPE (inner_arg0))
+ && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (inner_arg0, 0))))
+ inner_arg0 = TREE_OPERAND (inner_arg0, 0);
+
/* If this is a builtin_expect within a builtin_expect keep the
inner one. See through a comparison against a constant. It
might have been added to create a thruthvalue. */
- inner = arg0;
+ inner = inner_arg0;
+
if (COMPARISON_CLASS_P (inner)
&& TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST)
inner = TREE_OPERAND (inner, 0);
@@ -6281,14 +6290,7 @@ fold_builtin_expect (location_t loc, tre
&& DECL_FUNCTION_CODE (fndecl) == BUILT_IN_EXPECT)
return arg0;
- /* Distribute the expected value over short-circuiting operators.
- See through the cast from truthvalue_type_node to long. */
- inner = arg0;
- while (TREE_CODE (inner) == NOP_EXPR
- && INTEGRAL_TYPE_P (TREE_TYPE (inner))
- && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (inner, 0))))
- inner = TREE_OPERAND (inner, 0);
-
+ inner = inner_arg0;
code = TREE_CODE (inner);
if (code == TRUTH_ANDIF_EXPR || code == TRUTH_ORIF_EXPR)
{
@@ -6303,13 +6305,13 @@ fold_builtin_expect (location_t loc, tre
}
/* If the argument isn't invariant then there's nothing else we can do. */
- if (!TREE_CONSTANT (arg0))
+ if (!TREE_CONSTANT (inner_arg0))
return NULL_TREE;
/* If we expect that a comparison against the argument will fold to
a constant return the constant. In practice, this means a true
constant or the address of a non-weak symbol. */
- inner = arg0;
+ inner = inner_arg0;
STRIP_NOPS (inner);
if (TREE_CODE (inner) == ADDR_EXPR)
{
Index: gcc-head/gcc/fold-const.c
===================================================================
--- gcc-head.orig/gcc/fold-const.c
+++ gcc-head/gcc/fold-const.c
@@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
non-integral type.
Do not fold the result as that would not simplify further, also
folding again results in recursions. */
- if (INTEGRAL_TYPE_P (type))
+ if (TREE_CODE (type) == BOOLEAN_TYPE)
return build2_loc (loc, TREE_CODE (op0), type,
TREE_OPERAND (op0, 0),
TREE_OPERAND (op0, 1));
- else
+ else if (!INTEGRAL_TYPE_P (type))
return build3_loc (loc, COND_EXPR, type, op0,
fold_convert (type, boolean_true_node),
fold_convert (type, boolean_false_node));
Index: gcc-head/gcc/tree-ssa.c
===================================================================
--- gcc-head.orig/gcc/tree-ssa.c
+++ gcc-head/gcc/tree-ssa.c
@@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
|| TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
return false;
- /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
- one. */
- if (TREE_CODE (inner_type) != BOOLEAN_TYPE
- && TREE_CODE (outer_type) == BOOLEAN_TYPE
+ /* Preserve conversions to/from BOOLEAN_TYPE if types are not
+ of precision one. */
+ if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
+ != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
&& TYPE_PRECISION (outer_type) != 1)
return false;
Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor1.c
+++ gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
@@ -7,8 +7,5 @@ foo (int a, int b, int c)
return ((a && !b && c) || (!a && b && c));
}
-/* We expect to see "<bb N>"; confirm that, so that we know to count
- it in the real test. */
-/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 5 "optimized" } } */
-/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
*-*-* } } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor3.c
+++ gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
@@ -7,8 +7,5 @@ foo (int a, int b)
return ((a && !b) || (!a && b));
}
-/* We expect to see "<bb N>"; confirm that, so that we know to count
- it in the real test. */
-/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 1 "optimized" } } */
-/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
*-*-* } } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/tree-ssa-forwprop.c
===================================================================
--- gcc-head.orig/gcc/tree-ssa-forwprop.c
+++ gcc-head/gcc/tree-ssa-forwprop.c
@@ -1874,6 +1874,50 @@ simplify_bitwise_binary (gimple_stmt_ite
return true;
}
+ /* See if we can combine comparisons for & or |. */
+ if (TREE_CODE_CLASS (def1_code) == tcc_comparison
+ && TREE_CODE_CLASS (def2_code) == tcc_comparison)
+ {
+ if (code == BIT_AND_EXPR)
+ res = maybe_fold_and_comparisons (def1_code, def1_arg1,
+ gimple_assign_rhs2 (def1),
+ def2_code, def2_arg1,
+ gimple_assign_rhs2 (def2));
+ else if (code == BIT_IOR_EXPR)
+ res = maybe_fold_or_comparisons (def1_code, def1_arg1,
+ gimple_assign_rhs2 (def1),
+ def2_code, def2_arg1,
+ gimple_assign_rhs2 (def2));
+
+ /* We handle here only constant results and
+ cases (X cmp-1 Y) | (X cmp-2 Y) -> X cmp-3 Y. */
+ if (res && TREE_CODE (res) != INTEGER_CST
+ && (TREE_CODE_CLASS (TREE_CODE (res)) != tcc_comparison
+ || TREE_OPERAND (res, 0) != def1_arg1
+ || TREE_OPERAND (res, 1) != gimple_assign_rhs2 (def1)))
+ res = NULL_TREE;
+ if (res)
+ {
+ /* maybe_fold_and_comparisons and maybe_fold_or_comparisons
+ always give us a boolean_type_node value back. If the original
+ BIT_AND_EXPR or BIT_IOR_EXPR was of a wider integer type,
+ we need to convert. */
+ if (TREE_CODE (res) == INTEGER_CST)
+ {
+ if (!useless_type_conversion_p (TREE_TYPE (arg1),
+ TREE_TYPE (res)))
+ res = fold_convert (TREE_TYPE (arg1), res);
+ gimple_assign_set_rhs_from_tree (gsi, res);
+ }
+ else
+ gimple_assign_set_rhs_with_ops (gsi, TREE_CODE (res),
+ TREE_OPERAND (res, 0),
+ TREE_OPERAND (res, 1));
+
+ update_stmt (gsi_stmt (*gsi));
+ return true;
+ }
+ }
return false;
}
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-20 13:32 ` Kai Tietz
@ 2011-07-20 13:41 ` Richard Guenther
2011-07-20 14:07 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Richard Guenther @ 2011-07-20 13:41 UTC (permalink / raw)
To: Kai Tietz; +Cc: GCC Patches
On Wed, Jul 20, 2011 at 3:05 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
> Hello,
>
> this is the revised version of the partial pre-approved patch for preserving
> type-casts from/to boolean-types. It fixes additionally the regression in
> tree-ssa/builtin-expect-5.c testcase, which was caused by fold_builtin_expect.
> Additionally there was a regression in gcc.dg/pr28685-1.c, which is fixed by
> the change in tree-ssa-forwprop.c's function simplify_bitwise_binary. This
> is just temporary necessary. As soon as we are boolifying comparisons in
> gimplifier, the pattern-matching in tree-ssa-reassoc will match for 2
> branched cases
> again and we can remove the hunk from forward-propagation again.
Hm, if we can't apply this pieces without regressions we shouldn't. They
can then wait for the boolification patch.
Can you explain the fold_builtin_expect change? I'm lost in the maze
of inner/inner_arg0/arg0 renaming game. It looks as if the patch only
moves stuff - but that can't possibly be the case. So, what's going on
there?
Thanks,
Richard.
> 2011-07-20 Kai Tietz <ktietz@redhat.com>
>
> * fold-const.c (fold_unary_loc): Preserve
> non-boolean-typed casts.
> * tree-ssa.c (useless_type_conversion_p): Preserve incompatible
> casts from/to boolean,
> * builtins.c (fold_builtin_expect): See through the cast
> from truthvalue_type_node to long.
> * tree-ssa-forwprop.c (simplify_bitwise_binary): Add
> simplification for CMP bitwise-binary CMP.
>
>
> Bootstrapped and regression tested for all standard languages plus Ada
> and Obj-C++ on
> host x86_64-pc-linux-gnu. Ok for apply?
>
>
> 2011-07-20 Kai Tietz <ktietz@redhat.com>
>
> * gcc.dg/binop-xor1.c: Mark it as expected fail.
> * gcc.dg/binop-xor3.c: Likewise.
>
> Index: gcc-head/gcc/builtins.c
> ===================================================================
> --- gcc-head.orig/gcc/builtins.c
> +++ gcc-head/gcc/builtins.c
> @@ -6264,13 +6264,22 @@ build_builtin_expect_predicate (location
> static tree
> fold_builtin_expect (location_t loc, tree arg0, tree arg1)
> {
> - tree inner, fndecl;
> + tree inner, fndecl, inner_arg0;
> enum tree_code code;
>
> + /* Distribute the expected value over short-circuiting operators.
> + See through the cast from truthvalue_type_node to long. */
> + inner_arg0 = arg0;
> + while (TREE_CODE (inner_arg0) == NOP_EXPR
> + && INTEGRAL_TYPE_P (TREE_TYPE (inner_arg0))
> + && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (inner_arg0, 0))))
> + inner_arg0 = TREE_OPERAND (inner_arg0, 0);
> +
> /* If this is a builtin_expect within a builtin_expect keep the
> inner one. See through a comparison against a constant. It
> might have been added to create a thruthvalue. */
> - inner = arg0;
> + inner = inner_arg0;
> +
> if (COMPARISON_CLASS_P (inner)
> && TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST)
> inner = TREE_OPERAND (inner, 0);
> @@ -6281,14 +6290,7 @@ fold_builtin_expect (location_t loc, tre
> && DECL_FUNCTION_CODE (fndecl) == BUILT_IN_EXPECT)
> return arg0;
>
> - /* Distribute the expected value over short-circuiting operators.
> - See through the cast from truthvalue_type_node to long. */
> - inner = arg0;
> - while (TREE_CODE (inner) == NOP_EXPR
> - && INTEGRAL_TYPE_P (TREE_TYPE (inner))
> - && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (inner, 0))))
> - inner = TREE_OPERAND (inner, 0);
> -
> + inner = inner_arg0;
> code = TREE_CODE (inner);
> if (code == TRUTH_ANDIF_EXPR || code == TRUTH_ORIF_EXPR)
> {
> @@ -6303,13 +6305,13 @@ fold_builtin_expect (location_t loc, tre
> }
>
> /* If the argument isn't invariant then there's nothing else we can do. */
> - if (!TREE_CONSTANT (arg0))
> + if (!TREE_CONSTANT (inner_arg0))
> return NULL_TREE;
>
> /* If we expect that a comparison against the argument will fold to
> a constant return the constant. In practice, this means a true
> constant or the address of a non-weak symbol. */
> - inner = arg0;
> + inner = inner_arg0;
> STRIP_NOPS (inner);
> if (TREE_CODE (inner) == ADDR_EXPR)
> {
> Index: gcc-head/gcc/fold-const.c
> ===================================================================
> --- gcc-head.orig/gcc/fold-const.c
> +++ gcc-head/gcc/fold-const.c
> @@ -7665,11 +7665,11 @@ fold_unary_loc (location_t loc, enum tre
> non-integral type.
> Do not fold the result as that would not simplify further, also
> folding again results in recursions. */
> - if (INTEGRAL_TYPE_P (type))
> + if (TREE_CODE (type) == BOOLEAN_TYPE)
> return build2_loc (loc, TREE_CODE (op0), type,
> TREE_OPERAND (op0, 0),
> TREE_OPERAND (op0, 1));
> - else
> + else if (!INTEGRAL_TYPE_P (type))
> return build3_loc (loc, COND_EXPR, type, op0,
> fold_convert (type, boolean_true_node),
> fold_convert (type, boolean_false_node));
> Index: gcc-head/gcc/tree-ssa.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-ssa.c
> +++ gcc-head/gcc/tree-ssa.c
> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
> return false;
>
> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
> - one. */
> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
> + of precision one. */
> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
> && TYPE_PRECISION (outer_type) != 1)
> return false;
>
> Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor1.c
> +++ gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
> @@ -7,8 +7,5 @@ foo (int a, int b, int c)
> return ((a && !b && c) || (!a && b && c));
> }
>
> -/* We expect to see "<bb N>"; confirm that, so that we know to count
> - it in the real test. */
> -/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 5 "optimized" } } */
> -/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
> +/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
> *-*-* } } } */
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor3.c
> +++ gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
> @@ -7,8 +7,5 @@ foo (int a, int b)
> return ((a && !b) || (!a && b));
> }
>
> -/* We expect to see "<bb N>"; confirm that, so that we know to count
> - it in the real test. */
> -/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 1 "optimized" } } */
> -/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
> +/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
> *-*-* } } } */
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/tree-ssa-forwprop.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
> +++ gcc-head/gcc/tree-ssa-forwprop.c
> @@ -1874,6 +1874,50 @@ simplify_bitwise_binary (gimple_stmt_ite
> return true;
> }
>
> + /* See if we can combine comparisons for & or |. */
> + if (TREE_CODE_CLASS (def1_code) == tcc_comparison
> + && TREE_CODE_CLASS (def2_code) == tcc_comparison)
> + {
> + if (code == BIT_AND_EXPR)
> + res = maybe_fold_and_comparisons (def1_code, def1_arg1,
> + gimple_assign_rhs2 (def1),
> + def2_code, def2_arg1,
> + gimple_assign_rhs2 (def2));
> + else if (code == BIT_IOR_EXPR)
> + res = maybe_fold_or_comparisons (def1_code, def1_arg1,
> + gimple_assign_rhs2 (def1),
> + def2_code, def2_arg1,
> + gimple_assign_rhs2 (def2));
> +
> + /* We handle here only constant results and
> + cases (X cmp-1 Y) | (X cmp-2 Y) -> X cmp-3 Y. */
> + if (res && TREE_CODE (res) != INTEGER_CST
> + && (TREE_CODE_CLASS (TREE_CODE (res)) != tcc_comparison
> + || TREE_OPERAND (res, 0) != def1_arg1
> + || TREE_OPERAND (res, 1) != gimple_assign_rhs2 (def1)))
> + res = NULL_TREE;
> + if (res)
> + {
> + /* maybe_fold_and_comparisons and maybe_fold_or_comparisons
> + always give us a boolean_type_node value back. If the original
> + BIT_AND_EXPR or BIT_IOR_EXPR was of a wider integer type,
> + we need to convert. */
> + if (TREE_CODE (res) == INTEGER_CST)
> + {
> + if (!useless_type_conversion_p (TREE_TYPE (arg1),
> + TREE_TYPE (res)))
> + res = fold_convert (TREE_TYPE (arg1), res);
> + gimple_assign_set_rhs_from_tree (gsi, res);
> + }
> + else
> + gimple_assign_set_rhs_with_ops (gsi, TREE_CODE (res),
> + TREE_OPERAND (res, 0),
> + TREE_OPERAND (res, 1));
> +
> + update_stmt (gsi_stmt (*gsi));
> + return true;
> + }
> + }
> return false;
> }
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-20 13:41 ` Richard Guenther
@ 2011-07-20 14:07 ` Kai Tietz
2011-07-20 14:29 ` Richard Guenther
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-20 14:07 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
2011/7/20 Richard Guenther <richard.guenther@gmail.com>:
> On Wed, Jul 20, 2011 at 3:05 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>> Hello,
>>
>> this is the revised version of the partial pre-approved patch for preserving
>> type-casts from/to boolean-types. It fixes additionally the regression in
>> tree-ssa/builtin-expect-5.c testcase, which was caused by fold_builtin_expect.
>> Additionally there was a regression in gcc.dg/pr28685-1.c, which is fixed by
>> the change in tree-ssa-forwprop.c's function simplify_bitwise_binary. This
>> is just temporary necessary. As soon as we are boolifying comparisons in
>> gimplifier, the pattern-matching in tree-ssa-reassoc will match for 2
>> branched cases
>> again and we can remove the hunk from forward-propagation again.
>
> Hm, if we can't apply this pieces without regressions we shouldn't. They
> can then wait for the boolification patch.
>
> Can you explain the fold_builtin_expect change? I'm lost in the maze
> of inner/inner_arg0/arg0 renaming game. It looks as if the patch only
> moves stuff - but that can't possibly be the case. So, what's going on
> there?
Well, the issue is here that fold_builtin_expect checks here for a
comparison. If this comparison was created initially with a
boolean-type, the cast to 'long' will be in tree arg0 = (long)
CMP-with-boolean-type, as we are preserving here casts from
boolean-types (see the fold-const change). So we need to see through
this casts to match the compare and call cases. So I moved this "see
through" part before first pattern-match and introduced here a
helper-variable inner_arg0 to avoid double while-loop. The "inner"
variable might get invalid
...
if (COMPARISON_CLASS_P (inner)
&& TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST)
inner = TREE_OPERAND (inner, 0);
...
These are those "prefixed casts" you were asking in the other patch about.
Regards,
Kai
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-20 14:07 ` Kai Tietz
@ 2011-07-20 14:29 ` Richard Guenther
2011-07-20 17:43 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Richard Guenther @ 2011-07-20 14:29 UTC (permalink / raw)
To: Kai Tietz; +Cc: GCC Patches
On Wed, Jul 20, 2011 at 3:31 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
> 2011/7/20 Richard Guenther <richard.guenther@gmail.com>:
>> On Wed, Jul 20, 2011 at 3:05 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>> Hello,
>>>
>>> this is the revised version of the partial pre-approved patch for preserving
>>> type-casts from/to boolean-types. It fixes additionally the regression in
>>> tree-ssa/builtin-expect-5.c testcase, which was caused by fold_builtin_expect.
>>> Additionally there was a regression in gcc.dg/pr28685-1.c, which is fixed by
>>> the change in tree-ssa-forwprop.c's function simplify_bitwise_binary. This
>>> is just temporary necessary. As soon as we are boolifying comparisons in
>>> gimplifier, the pattern-matching in tree-ssa-reassoc will match for 2
>>> branched cases
>>> again and we can remove the hunk from forward-propagation again.
>>
>> Hm, if we can't apply this pieces without regressions we shouldn't. They
>> can then wait for the boolification patch.
>>
>> Can you explain the fold_builtin_expect change? I'm lost in the maze
>> of inner/inner_arg0/arg0 renaming game. It looks as if the patch only
>> moves stuff - but that can't possibly be the case. So, what's going on
>> there?
>
> Well, the issue is here that fold_builtin_expect checks here for a
> comparison. If this comparison was created initially with a
> boolean-type, the cast to 'long' will be in tree arg0 = (long)
> CMP-with-boolean-type, as we are preserving here casts from
> boolean-types (see the fold-const change). So we need to see through
> this casts to match the compare and call cases. So I moved this "see
> through" part before first pattern-match and introduced here a
> helper-variable inner_arg0 to avoid double while-loop. The "inner"
> variable might get invalid
> ...
> if (COMPARISON_CLASS_P (inner)
> && TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST)
> inner = TREE_OPERAND (inner, 0);
> ...
>
> These are those "prefixed casts" you were asking in the other patch about.
I see. So, if the builtin.c parts bootstrap & test ok then they are ok
to commit separately.
Thanks,
Richard.
> Regards,
> Kai
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-20 14:29 ` Richard Guenther
@ 2011-07-20 17:43 ` Kai Tietz
2011-07-21 11:34 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-20 17:43 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
2011/7/20 Richard Guenther <richard.guenther@gmail.com>:
> On Wed, Jul 20, 2011 at 3:31 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>> 2011/7/20 Richard Guenther <richard.guenther@gmail.com>:
>>> On Wed, Jul 20, 2011 at 3:05 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
>>>> Hello,
>>>>
>>>> this is the revised version of the partial pre-approved patch for preserving
>>>> type-casts from/to boolean-types. It fixes additionally the regression in
>>>> tree-ssa/builtin-expect-5.c testcase, which was caused by fold_builtin_expect.
>>>> Additionally there was a regression in gcc.dg/pr28685-1.c, which is fixed by
>>>> the change in tree-ssa-forwprop.c's function simplify_bitwise_binary. This
>>>> is just temporary necessary. As soon as we are boolifying comparisons in
>>>> gimplifier, the pattern-matching in tree-ssa-reassoc will match for 2
>>>> branched cases
>>>> again and we can remove the hunk from forward-propagation again.
>>>
>>> Hm, if we can't apply this pieces without regressions we shouldn't. They
>>> can then wait for the boolification patch.
>>>
>>> Can you explain the fold_builtin_expect change? I'm lost in the maze
>>> of inner/inner_arg0/arg0 renaming game. It looks as if the patch only
>>> moves stuff - but that can't possibly be the case. So, what's going on
>>> there?
>>
>> Well, the issue is here that fold_builtin_expect checks here for a
>> comparison. If this comparison was created initially with a
>> boolean-type, the cast to 'long' will be in tree arg0 = (long)
>> CMP-with-boolean-type, as we are preserving here casts from
>> boolean-types (see the fold-const change). So we need to see through
>> this casts to match the compare and call cases. So I moved this "see
>> through" part before first pattern-match and introduced here a
>> helper-variable inner_arg0 to avoid double while-loop. The "inner"
>> variable might get invalid
>> ...
>> if (COMPARISON_CLASS_P (inner)
>> && TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST)
>> inner = TREE_OPERAND (inner, 0);
>> ...
>>
>> These are those "prefixed casts" you were asking in the other patch about.
>
> I see. So, if the builtin.c parts bootstrap & test ok then they are ok
> to commit separately.
>
> Thanks,
> Richard.
>
>> Regards,
>> Kai
>>
Hello,
2011-07-20 Kai Tietz <ktietz@redhat.com>
* builtins.c (fold_builtin_expect): See through the cast
from truthvalue_type_node to long.
Bootstrapped and regression tested for all languages (including Ada
and Obj-C++) on host x86_64-pc-linux-gnu.
Applied as pre-approved.
Regards,
Kai
Index: gcc-head/gcc/builtins.c
===================================================================
--- gcc-head.orig/gcc/builtins.c
+++ gcc-head/gcc/builtins.c
@@ -6264,13 +6264,22 @@ build_builtin_expect_predicate (location
static tree
fold_builtin_expect (location_t loc, tree arg0, tree arg1)
{
- tree inner, fndecl;
+ tree inner, fndecl, inner_arg0;
enum tree_code code;
+ /* Distribute the expected value over short-circuiting operators.
+ See through the cast from truthvalue_type_node to long. */
+ inner_arg0 = arg0;
+ while (TREE_CODE (inner_arg0) == NOP_EXPR
+ && INTEGRAL_TYPE_P (TREE_TYPE (inner_arg0))
+ && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (inner_arg0, 0))))
+ inner_arg0 = TREE_OPERAND (inner_arg0, 0);
+
/* If this is a builtin_expect within a builtin_expect keep the
inner one. See through a comparison against a constant. It
might have been added to create a thruthvalue. */
- inner = arg0;
+ inner = inner_arg0;
+
if (COMPARISON_CLASS_P (inner)
&& TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST)
inner = TREE_OPERAND (inner, 0);
@@ -6281,14 +6290,7 @@ fold_builtin_expect (location_t loc, tre
&& DECL_FUNCTION_CODE (fndecl) == BUILT_IN_EXPECT)
return arg0;
- /* Distribute the expected value over short-circuiting operators.
- See through the cast from truthvalue_type_node to long. */
- inner = arg0;
- while (TREE_CODE (inner) == NOP_EXPR
- && INTEGRAL_TYPE_P (TREE_TYPE (inner))
- && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (inner, 0))))
- inner = TREE_OPERAND (inner, 0);
-
+ inner = inner_arg0;
code = TREE_CODE (inner);
if (code == TRUTH_ANDIF_EXPR || code == TRUTH_ORIF_EXPR)
{
@@ -6303,13 +6305,13 @@ fold_builtin_expect (location_t loc, tre
}
/* If the argument isn't invariant then there's nothing else we can do. */
- if (!TREE_CONSTANT (arg0))
+ if (!TREE_CONSTANT (inner_arg0))
return NULL_TREE;
/* If we expect that a comparison against the argument will fold to
a constant return the constant. In practice, this means a true
constant or the address of a non-weak symbol. */
- inner = arg0;
+ inner = inner_arg0;
STRIP_NOPS (inner);
if (TREE_CODE (inner) == ADDR_EXPR)
{
2011-07-20 Kai Tietz <ktietz@redhat.com>
* fold-const.c (fold_unary_loc): Preserve
non-boolean-typed casts.
* tree-ssa.c (useless_type_conversion_p): Preserve incompatible
casts from/to boolean,
* builtins.c (fold_builtin_expect): See through the cast
from truthvalue_type_node to long.
* tree-ssa-forwprop.c (simplify_bitwise_binary): Add
simplification for CMP bitwise-binary CMP.
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-20 17:43 ` Kai Tietz
@ 2011-07-21 11:34 ` Kai Tietz
2011-07-21 12:13 ` Richard Guenther
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-21 11:34 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
Hello,
Updated and again merged variant of this patch.
We have now just two vrp related regressions by this patch,
and it is addressed already by a posted one.
2011-07-21 Kai Tietz <ktietz@redhat.com>
* fold-const.c (fold_unary_loc): Preserve indirect
comparison cast to none-boolean type.
* tree-ssa.c (useless_type_conversion_p): Preserve cast
from/to boolean-type.
* gimplify.c (gimple_boolify): Handle boolification
of comparisons.
(gimplify_expr): Boolifiy non aggregate-typed
comparisons.
* tree-cfg.c (verify_gimple_comparison): Check result
type of comparison expression.
* tree-ssa-forwprop.c (forward_propagate_comparison):
Adjust test of condition result and disallow type-cast
sinking into comparison.
* gcc.dg/tree-ssa/pr21031.c: Adjusted.
* gcc.dg/tree-ssa/pr30978.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
Bootstrapped and regression tested for x86_64-pc-linux-gnu. Ok for apply?
Regards,
Kai
Index: gcc-head/gcc/fold-const.c
===================================================================
--- gcc-head.orig/gcc/fold-const.c
+++ gcc-head/gcc/fold-const.c
@@ -7664,11 +7664,11 @@ fold_unary_loc (location_t loc, enum tre
non-integral type.
Do not fold the result as that would not simplify further, also
folding again results in recursions. */
- if (INTEGRAL_TYPE_P (type))
+ if (TREE_CODE (type) == BOOLEAN_TYPE)
return build2_loc (loc, TREE_CODE (op0), type,
TREE_OPERAND (op0, 0),
TREE_OPERAND (op0, 1));
- else
+ else if (!INTEGRAL_TYPE_P (type))
return build3_loc (loc, COND_EXPR, type, op0,
fold_convert (type, boolean_true_node),
fold_convert (type, boolean_false_node));
Index: gcc-head/gcc/tree-ssa.c
===================================================================
--- gcc-head.orig/gcc/tree-ssa.c
+++ gcc-head/gcc/tree-ssa.c
@@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
|| TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
return false;
- /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
- one. */
- if (TREE_CODE (inner_type) != BOOLEAN_TYPE
- && TREE_CODE (outer_type) == BOOLEAN_TYPE
+ /* Preserve conversions to/from BOOLEAN_TYPE if types are not
+ of precision one. */
+ if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
+ != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
&& TYPE_PRECISION (outer_type) != 1)
return false;
Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor1.c
+++ gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
@@ -7,8 +7,5 @@ foo (int a, int b, int c)
return ((a && !b && c) || (!a && b && c));
}
-/* We expect to see "<bb N>"; confirm that, so that we know to count
- it in the real test. */
-/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 5 "optimized" } } */
-/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
*-*-* } } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor3.c
+++ gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
@@ -7,8 +7,5 @@ foo (int a, int b)
return ((a && !b) || (!a && b));
}
-/* We expect to see "<bb N>"; confirm that, so that we know to count
- it in the real test. */
-/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 1 "optimized" } } */
-/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
*-*-* } } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/tree-ssa-forwprop.c
===================================================================
--- gcc-head.orig/gcc/tree-ssa-forwprop.c
+++ gcc-head/gcc/tree-ssa-forwprop.c
@@ -1132,20 +1132,12 @@ forward_propagate_comparison (gimple stm
if (!INTEGRAL_TYPE_P (TREE_TYPE (lhs)))
return false;
- /* We can propagate the condition into a conversion. */
- if (CONVERT_EXPR_CODE_P (code))
- {
- /* Avoid using fold here as that may create a COND_EXPR with
- non-boolean condition as canonical form. */
- tmp = build2 (gimple_assign_rhs_code (stmt), TREE_TYPE (lhs),
- gimple_assign_rhs1 (stmt), gimple_assign_rhs2 (stmt));
- }
/* We can propagate the condition into a statement that
computes the logical negation of the comparison result. */
- else if ((code == BIT_NOT_EXPR
- && TYPE_PRECISION (TREE_TYPE (lhs)) == 1)
- || (code == BIT_XOR_EXPR
- && integer_onep (gimple_assign_rhs2 (use_stmt))))
+ if ((code == BIT_NOT_EXPR
+ && TYPE_PRECISION (TREE_TYPE (lhs)) == 1)
+ || (code == BIT_XOR_EXPR
+ && integer_onep (gimple_assign_rhs2 (use_stmt))))
{
tree type = TREE_TYPE (gimple_assign_rhs1 (stmt));
bool nans = HONOR_NANS (TYPE_MODE (type));
@@ -1750,6 +1742,7 @@ simplify_bitwise_binary (gimple_stmt_ite
arg2));
tem = make_ssa_name (tem, newop);
gimple_assign_set_lhs (newop, tem);
+ gimple_set_location (newop, gimple_location (stmt));
gsi_insert_before (gsi, newop, GSI_SAME_STMT);
gimple_assign_set_rhs_with_ops_1 (gsi, NOP_EXPR,
tem, NULL_TREE, NULL_TREE);
@@ -1779,6 +1772,7 @@ simplify_bitwise_binary (gimple_stmt_ite
newop = gimple_build_assign_with_ops (code, tem, def1_arg1, def2_arg1);
tem = make_ssa_name (tem, newop);
gimple_assign_set_lhs (newop, tem);
+ gimple_set_location (newop, gimple_location (stmt));
gsi_insert_before (gsi, newop, GSI_SAME_STMT);
gimple_assign_set_rhs_with_ops_1 (gsi, NOP_EXPR,
tem, NULL_TREE, NULL_TREE);
@@ -1807,6 +1801,7 @@ simplify_bitwise_binary (gimple_stmt_ite
tem, def1_arg1, arg2);
tem = make_ssa_name (tem, newop);
gimple_assign_set_lhs (newop, tem);
+ gimple_set_location (newop, gimple_location (stmt));
/* Make sure to re-process the new stmt as it's walking upwards. */
gsi_insert_before (gsi, newop, GSI_NEW_STMT);
gimple_assign_set_rhs1 (stmt, tem);
Index: gcc-head/gcc/gimplify.c
===================================================================
--- gcc-head.orig/gcc/gimplify.c
+++ gcc-head/gcc/gimplify.c
@@ -2860,18 +2860,23 @@ gimple_boolify (tree expr)
case TRUTH_NOT_EXPR:
TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
- /* FALLTHRU */
- case EQ_EXPR: case NE_EXPR:
- case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
/* These expressions always produce boolean results. */
- TREE_TYPE (expr) = boolean_type_node;
+ if (TREE_CODE (type) != BOOLEAN_TYPE)
+ TREE_TYPE (expr) = boolean_type_node;
return expr;
default:
+ if (COMPARISON_CLASS_P (expr))
+ {
+ /* There expressions always prduce boolean results. */
+ if (TREE_CODE (type) != BOOLEAN_TYPE)
+ TREE_TYPE (expr) = boolean_type_node;
+ return expr;
+ }
/* Other expressions that get here must have boolean values, but
might need to be converted to the appropriate mode. */
- if (type == boolean_type_node)
+ if (TREE_CODE (type) == BOOLEAN_TYPE)
return expr;
return fold_convert_loc (loc, boolean_type_node, expr);
}
@@ -7316,7 +7321,19 @@ gimplify_expr (tree *expr_p, gimple_seq
tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
if (!AGGREGATE_TYPE_P (type))
- goto expr_2;
+ {
+ tree org_type = TREE_TYPE (*expr_p);
+ *expr_p = gimple_boolify (*expr_p);
+ if (!useless_type_conversion_p (org_type,
+ TREE_TYPE (*expr_p)))
+ {
+ *expr_p = fold_convert_loc (input_location,
+ org_type, *expr_p);
+ ret = GS_OK;
+ }
+ else
+ goto expr_2;
+ }
else if (TYPE_MODE (type) != BLKmode)
ret = gimplify_scalar_mode_aggregate_compare (expr_p);
else
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
@@ -16,5 +16,5 @@ foo (int a)
return 0;
}
-/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
+/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
/* { dg-final { cleanup-tree-dump "forwprop1" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
@@ -10,5 +10,5 @@ int foo(int a)
return e;
}
-/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
+/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
===================================================================
--- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
+++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
@@ -2,5 +2,5 @@
/* { dg-options "-O -fdump-tree-fre1-details" } */
int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
-/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
+/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
/* { dg-final { cleanup-tree-dump "fre1" } } */
Index: gcc-head/gcc/tree-cfg.c
===================================================================
--- gcc-head.orig/gcc/tree-cfg.c
+++ gcc-head/gcc/tree-cfg.c
@@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
&& (!POINTER_TYPE_P (op0_type)
|| !POINTER_TYPE_P (op1_type)
|| TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
- || !INTEGRAL_TYPE_P (type))
+ || !INTEGRAL_TYPE_P (type)
+ || (TREE_CODE (type) != BOOLEAN_TYPE
+ && TYPE_PRECISION (type) != 1))
{
error ("type mismatch in comparison expression");
debug_generic_expr (type);
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-21 11:34 ` Kai Tietz
@ 2011-07-21 12:13 ` Richard Guenther
2011-07-21 12:48 ` Kai Tietz
0 siblings, 1 reply; 23+ messages in thread
From: Richard Guenther @ 2011-07-21 12:13 UTC (permalink / raw)
To: Kai Tietz; +Cc: GCC Patches
On Thu, Jul 21, 2011 at 1:12 PM, Kai Tietz <ktietz70@googlemail.com> wrote:
> Hello,
>
> Updated and again merged variant of this patch.
> We have now just two vrp related regressions by this patch,
> and it is addressed already by a posted one.
>
> 2011-07-21 Kai Tietz <ktietz@redhat.com>
>
> * fold-const.c (fold_unary_loc): Preserve indirect
> comparison cast to none-boolean type.
> * tree-ssa.c (useless_type_conversion_p): Preserve cast
> from/to boolean-type.
> * gimplify.c (gimple_boolify): Handle boolification
> of comparisons.
> (gimplify_expr): Boolifiy non aggregate-typed
> comparisons.
> * tree-cfg.c (verify_gimple_comparison): Check result
> type of comparison expression.
> * tree-ssa-forwprop.c (forward_propagate_comparison):
> Adjust test of condition result and disallow type-cast
> sinking into comparison.
>
>
> * gcc.dg/tree-ssa/pr21031.c: Adjusted.
> * gcc.dg/tree-ssa/pr30978.c: Likewise.
> * gcc.dg/tree-ssa/ssa-fre-6.c: Likewise.
>
> Bootstrapped and regression tested for x86_64-pc-linux-gnu. Ok for apply?
Comments below (well, just two minor testsuite ones).
> Regards,
> Kai
>
> Index: gcc-head/gcc/fold-const.c
> ===================================================================
> --- gcc-head.orig/gcc/fold-const.c
> +++ gcc-head/gcc/fold-const.c
> @@ -7664,11 +7664,11 @@ fold_unary_loc (location_t loc, enum tre
> non-integral type.
> Do not fold the result as that would not simplify further, also
> folding again results in recursions. */
> - if (INTEGRAL_TYPE_P (type))
> + if (TREE_CODE (type) == BOOLEAN_TYPE)
> return build2_loc (loc, TREE_CODE (op0), type,
> TREE_OPERAND (op0, 0),
> TREE_OPERAND (op0, 1));
> - else
> + else if (!INTEGRAL_TYPE_P (type))
> return build3_loc (loc, COND_EXPR, type, op0,
> fold_convert (type, boolean_true_node),
> fold_convert (type, boolean_false_node));
> Index: gcc-head/gcc/tree-ssa.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-ssa.c
> +++ gcc-head/gcc/tree-ssa.c
> @@ -1306,10 +1306,10 @@ useless_type_conversion_p (tree outer_ty
> || TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type))
> return false;
>
> - /* Preserve conversions to BOOLEAN_TYPE if it is not of precision
> - one. */
> - if (TREE_CODE (inner_type) != BOOLEAN_TYPE
> - && TREE_CODE (outer_type) == BOOLEAN_TYPE
> + /* Preserve conversions to/from BOOLEAN_TYPE if types are not
> + of precision one. */
> + if (((TREE_CODE (inner_type) == BOOLEAN_TYPE)
> + != (TREE_CODE (outer_type) == BOOLEAN_TYPE))
> && TYPE_PRECISION (outer_type) != 1)
> return false;
>
> Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor1.c
> +++ gcc-head/gcc/testsuite/gcc.dg/binop-xor1.c
> @@ -7,8 +7,5 @@ foo (int a, int b, int c)
> return ((a && !b && c) || (!a && b && c));
> }
>
> -/* We expect to see "<bb N>"; confirm that, so that we know to count
> - it in the real test. */
> -/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 5 "optimized" } } */
> -/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
> +/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
> *-*-* } } } */
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/binop-xor3.c
> +++ gcc-head/gcc/testsuite/gcc.dg/binop-xor3.c
> @@ -7,8 +7,5 @@ foo (int a, int b)
> return ((a && !b) || (!a && b));
> }
>
> -/* We expect to see "<bb N>"; confirm that, so that we know to count
> - it in the real test. */
> -/* { dg-final { scan-tree-dump-times "<bb\[^>\]*>" 1 "optimized" } } */
> -/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" } } */
> +/* { dg-final { scan-tree-dump-times "\\\^" 1 "optimized" { xfail
> *-*-* } } } */
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/tree-ssa-forwprop.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-ssa-forwprop.c
> +++ gcc-head/gcc/tree-ssa-forwprop.c
> @@ -1132,20 +1132,12 @@ forward_propagate_comparison (gimple stm
> if (!INTEGRAL_TYPE_P (TREE_TYPE (lhs)))
> return false;
>
> - /* We can propagate the condition into a conversion. */
> - if (CONVERT_EXPR_CODE_P (code))
> - {
> - /* Avoid using fold here as that may create a COND_EXPR with
> - non-boolean condition as canonical form. */
> - tmp = build2 (gimple_assign_rhs_code (stmt), TREE_TYPE (lhs),
> - gimple_assign_rhs1 (stmt), gimple_assign_rhs2 (stmt));
> - }
> /* We can propagate the condition into a statement that
> computes the logical negation of the comparison result. */
> - else if ((code == BIT_NOT_EXPR
> - && TYPE_PRECISION (TREE_TYPE (lhs)) == 1)
> - || (code == BIT_XOR_EXPR
> - && integer_onep (gimple_assign_rhs2 (use_stmt))))
> + if ((code == BIT_NOT_EXPR
> + && TYPE_PRECISION (TREE_TYPE (lhs)) == 1)
> + || (code == BIT_XOR_EXPR
> + && integer_onep (gimple_assign_rhs2 (use_stmt))))
> {
> tree type = TREE_TYPE (gimple_assign_rhs1 (stmt));
> bool nans = HONOR_NANS (TYPE_MODE (type));
> @@ -1750,6 +1742,7 @@ simplify_bitwise_binary (gimple_stmt_ite
> arg2));
> tem = make_ssa_name (tem, newop);
> gimple_assign_set_lhs (newop, tem);
> + gimple_set_location (newop, gimple_location (stmt));
> gsi_insert_before (gsi, newop, GSI_SAME_STMT);
> gimple_assign_set_rhs_with_ops_1 (gsi, NOP_EXPR,
> tem, NULL_TREE, NULL_TREE);
> @@ -1779,6 +1772,7 @@ simplify_bitwise_binary (gimple_stmt_ite
> newop = gimple_build_assign_with_ops (code, tem, def1_arg1, def2_arg1);
> tem = make_ssa_name (tem, newop);
> gimple_assign_set_lhs (newop, tem);
> + gimple_set_location (newop, gimple_location (stmt));
> gsi_insert_before (gsi, newop, GSI_SAME_STMT);
> gimple_assign_set_rhs_with_ops_1 (gsi, NOP_EXPR,
> tem, NULL_TREE, NULL_TREE);
> @@ -1807,6 +1801,7 @@ simplify_bitwise_binary (gimple_stmt_ite
> tem, def1_arg1, arg2);
> tem = make_ssa_name (tem, newop);
> gimple_assign_set_lhs (newop, tem);
> + gimple_set_location (newop, gimple_location (stmt));
> /* Make sure to re-process the new stmt as it's walking upwards. */
> gsi_insert_before (gsi, newop, GSI_NEW_STMT);
> gimple_assign_set_rhs1 (stmt, tem);
> Index: gcc-head/gcc/gimplify.c
> ===================================================================
> --- gcc-head.orig/gcc/gimplify.c
> +++ gcc-head/gcc/gimplify.c
> @@ -2860,18 +2860,23 @@ gimple_boolify (tree expr)
>
> case TRUTH_NOT_EXPR:
> TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
> - /* FALLTHRU */
>
> - case EQ_EXPR: case NE_EXPR:
> - case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
> /* These expressions always produce boolean results. */
> - TREE_TYPE (expr) = boolean_type_node;
> + if (TREE_CODE (type) != BOOLEAN_TYPE)
> + TREE_TYPE (expr) = boolean_type_node;
> return expr;
>
> default:
> + if (COMPARISON_CLASS_P (expr))
> + {
> + /* There expressions always prduce boolean results. */
> + if (TREE_CODE (type) != BOOLEAN_TYPE)
> + TREE_TYPE (expr) = boolean_type_node;
> + return expr;
> + }
> /* Other expressions that get here must have boolean values, but
> might need to be converted to the appropriate mode. */
> - if (type == boolean_type_node)
> + if (TREE_CODE (type) == BOOLEAN_TYPE)
> return expr;
> return fold_convert_loc (loc, boolean_type_node, expr);
> }
> @@ -7316,7 +7321,19 @@ gimplify_expr (tree *expr_p, gimple_seq
> tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
>
> if (!AGGREGATE_TYPE_P (type))
> - goto expr_2;
> + {
> + tree org_type = TREE_TYPE (*expr_p);
> + *expr_p = gimple_boolify (*expr_p);
> + if (!useless_type_conversion_p (org_type,
> + TREE_TYPE (*expr_p)))
> + {
> + *expr_p = fold_convert_loc (input_location,
> + org_type, *expr_p);
> + ret = GS_OK;
> + }
> + else
> + goto expr_2;
> + }
> else if (TYPE_MODE (type) != BLKmode)
> ret = gimplify_scalar_mode_aggregate_compare (expr_p);
> else
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr21031.c
> @@ -16,5 +16,5 @@ foo (int a)
> return 0;
> }
>
> -/* { dg-final { scan-tree-dump-times "Replaced" 2 "forwprop1"} } */
> +/* { dg-final { scan-tree-dump-times "Replaced" 1 "forwprop1"} } */
I have looked at this change and it shows a regression for which I am
currently testing a patch, so this change will not be necessary.
> /* { dg-final { cleanup-tree-dump "forwprop1" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/pr30978.c
> @@ -10,5 +10,5 @@ int foo(int a)
> return e;
> }
>
> -/* { dg-final { scan-tree-dump "e_. = a_..D. > 0;" "optimized" } } */
> +/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
That no longer tests what the test was trying to do - we were testing
that the comparison is fully propagated to the return value. Now we
get (an expected) widening to the return type. So we should test for
something that still makes sure we did the required optimization,
which would for example be
/* We expect exactly two assignments. */
/* { dg-final { scan-tree-dump-times " = " 2 "optimized" } } */
/* One comparison and one extension to int. */
/* { dg-final { scan-tree-dump " = a_..D. > 0;" "optimized" } } */
/* { dg-final { scan-tree-dump "e_. = \\\(int\\\)" "optimized" } } */
please change the testcase this way (verifying that my suggestion
indeed works).
With these two changes the patch is ok to commit (it will also
regress gcc.target/i386/andor-2.c but that is an exact duplicate
of the already regressed gcc.dg/tree-ssa/vrp47.c).
Thanks,
Richard.
> /* { dg-final { cleanup-tree-dump "optimized" } } */
> Index: gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
> ===================================================================
> --- gcc-head.orig/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
> +++ gcc-head/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-6.c
> @@ -2,5 +2,5 @@
> /* { dg-options "-O -fdump-tree-fre1-details" } */
>
> int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
> -/* { dg-final { scan-tree-dump-times "Replaced " 5 "fre1" } } */
> +/* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */
> /* { dg-final { cleanup-tree-dump "fre1" } } */
> Index: gcc-head/gcc/tree-cfg.c
> ===================================================================
> --- gcc-head.orig/gcc/tree-cfg.c
> +++ gcc-head/gcc/tree-cfg.c
> @@ -3203,7 +3203,9 @@ verify_gimple_comparison (tree type, tre
> && (!POINTER_TYPE_P (op0_type)
> || !POINTER_TYPE_P (op1_type)
> || TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
> - || !INTEGRAL_TYPE_P (type))
> + || !INTEGRAL_TYPE_P (type)
> + || (TREE_CODE (type) != BOOLEAN_TYPE
> + && TYPE_PRECISION (type) != 1))
> {
> error ("type mismatch in comparison expression");
> debug_generic_expr (type);
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-21 12:13 ` Richard Guenther
@ 2011-07-21 12:48 ` Kai Tietz
2011-07-21 15:49 ` H.J. Lu
0 siblings, 1 reply; 23+ messages in thread
From: Kai Tietz @ 2011-07-21 12:48 UTC (permalink / raw)
To: Richard Guenther; +Cc: GCC Patches
2011/7/21 Richard Guenther <richard.guenther@gmail.com>:
> With these two changes the patch is ok to commit (it will also
> regress gcc.target/i386/andor-2.c but that is an exact duplicate
> of the already regressed gcc.dg/tree-ssa/vrp47.c).
>
> Thanks,
> Richard.
>
Ok, retested with your comments and applied at rev 176563.
Regards,
Kai
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-21 12:48 ` Kai Tietz
@ 2011-07-21 15:49 ` H.J. Lu
2011-07-21 15:52 ` H.J. Lu
0 siblings, 1 reply; 23+ messages in thread
From: H.J. Lu @ 2011-07-21 15:49 UTC (permalink / raw)
To: Kai Tietz; +Cc: Richard Guenther, GCC Patches
On Thu, Jul 21, 2011 at 5:12 AM, Kai Tietz <ktietz70@googlemail.com> wrote:
> 2011/7/21 Richard Guenther <richard.guenther@gmail.com>:
>> With these two changes the patch is ok to commit (it will also
>> regress gcc.target/i386/andor-2.c but that is an exact duplicate
>> of the already regressed gcc.dg/tree-ssa/vrp47.c).
>>
>> Thanks,
>> Richard.
>>
>
> Ok, retested with your comments and applied at rev 176563.
>
This caused:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49805
--
H.J.
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [patch tree-optimization]: [2 of 3]: Boolify compares & more
2011-07-21 15:49 ` H.J. Lu
@ 2011-07-21 15:52 ` H.J. Lu
0 siblings, 0 replies; 23+ messages in thread
From: H.J. Lu @ 2011-07-21 15:52 UTC (permalink / raw)
To: Kai Tietz; +Cc: Richard Guenther, GCC Patches
On Thu, Jul 21, 2011 at 8:40 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Thu, Jul 21, 2011 at 5:12 AM, Kai Tietz <ktietz70@googlemail.com> wrote:
>> 2011/7/21 Richard Guenther <richard.guenther@gmail.com>:
>>> With these two changes the patch is ok to commit (it will also
>>> regress gcc.target/i386/andor-2.c but that is an exact duplicate
>>> of the already regressed gcc.dg/tree-ssa/vrp47.c).
>>>
>>> Thanks,
>>> Richard.
>>>
>>
>> Ok, retested with your comments and applied at rev 176563.
>>
>
> This caused:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49805
>
This also caused:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49806
--
H.J.
^ permalink raw reply [flat|nested] 23+ messages in thread
end of thread, other threads:[~2011-07-21 15:42 UTC | newest]
Thread overview: 23+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-07-07 16:08 [patch tree-optimization]: [2 of 3]: Boolify compares & more Kai Tietz
2011-07-08 9:28 ` Richard Guenther
2011-07-08 11:35 ` Kai Tietz
2011-07-08 12:03 ` Richard Guenther
2011-07-11 15:57 ` Kai Tietz
2011-07-12 9:29 ` Richard Guenther
2011-07-12 10:00 ` Kai Tietz
2011-07-12 10:34 ` Richard Guenther
2011-07-12 12:25 ` Kai Tietz
2011-07-12 14:38 ` Richard Guenther
2011-07-19 12:08 ` Kai Tietz
2011-07-19 12:16 ` Richard Guenther
2011-07-19 22:24 ` Kai Tietz
2011-07-20 13:32 ` Kai Tietz
2011-07-20 13:41 ` Richard Guenther
2011-07-20 14:07 ` Kai Tietz
2011-07-20 14:29 ` Richard Guenther
2011-07-20 17:43 ` Kai Tietz
2011-07-21 11:34 ` Kai Tietz
2011-07-21 12:13 ` Richard Guenther
2011-07-21 12:48 ` Kai Tietz
2011-07-21 15:49 ` H.J. Lu
2011-07-21 15:52 ` H.J. Lu
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