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* [gcc r12-5548] tree-object-size: Abstract object_sizes array
@ 2021-11-26 18:17 Siddhesh Poyarekar
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From: Siddhesh Poyarekar @ 2021-11-26 18:17 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:4a2007594cff78fba6a29a0ec07fad31a7af19ff
commit r12-5548-g4a2007594cff78fba6a29a0ec07fad31a7af19ff
Author: Siddhesh Poyarekar <siddhesh@gotplt.org>
Date: Fri Nov 26 08:44:58 2021 +0530
tree-object-size: Abstract object_sizes array
Put all accesses to object_sizes behind functions so that we can add
dynamic capability more easily.
gcc/ChangeLog:
* tree-object-size.c (object_sizes_grow, object_sizes_release,
object_sizes_unknown_p, object_sizes_get, object_size_set_force,
object_sizes_set): New functions.
(addr_object_size, compute_builtin_object_size,
expr_object_size, call_object_size, unknown_object_size,
merge_object_sizes, plus_stmt_object_size,
cond_expr_object_size, collect_object_sizes_for,
check_for_plus_in_loops_1, init_object_sizes,
fini_object_sizes): Adjust.
Signed-off-by: Siddhesh Poyarekar <siddhesh@gotplt.org>
Diff:
---
gcc/tree-object-size.c | 177 +++++++++++++++++++++++++++----------------------
1 file changed, 98 insertions(+), 79 deletions(-)
diff --git a/gcc/tree-object-size.c b/gcc/tree-object-size.c
index 5e93bb74f92..3780437ff91 100644
--- a/gcc/tree-object-size.c
+++ b/gcc/tree-object-size.c
@@ -88,6 +88,71 @@ unknown (int object_size_type)
return ((unsigned HOST_WIDE_INT) -((object_size_type >> 1) ^ 1));
}
+/* Grow object_sizes[OBJECT_SIZE_TYPE] to num_ssa_names. */
+
+static inline void
+object_sizes_grow (int object_size_type)
+{
+ if (num_ssa_names > object_sizes[object_size_type].length ())
+ object_sizes[object_size_type].safe_grow (num_ssa_names, true);
+}
+
+/* Release object_sizes[OBJECT_SIZE_TYPE]. */
+
+static inline void
+object_sizes_release (int object_size_type)
+{
+ object_sizes[object_size_type].release ();
+}
+
+/* Return true if object_sizes[OBJECT_SIZE_TYPE][VARNO] is unknown. */
+
+static inline bool
+object_sizes_unknown_p (int object_size_type, unsigned varno)
+{
+ return (object_sizes[object_size_type][varno]
+ == unknown (object_size_type));
+}
+
+/* Return size for VARNO corresponding to OSI. */
+
+static inline unsigned HOST_WIDE_INT
+object_sizes_get (struct object_size_info *osi, unsigned varno)
+{
+ return object_sizes[osi->object_size_type][varno];
+}
+
+/* Set size for VARNO corresponding to OSI to VAL. */
+
+static inline bool
+object_sizes_set_force (struct object_size_info *osi, unsigned varno,
+ unsigned HOST_WIDE_INT val)
+{
+ object_sizes[osi->object_size_type][varno] = val;
+ return true;
+}
+
+/* Set size for VARNO corresponding to OSI to VAL if it is the new minimum or
+ maximum. */
+
+static inline bool
+object_sizes_set (struct object_size_info *osi, unsigned varno,
+ unsigned HOST_WIDE_INT val)
+{
+ int object_size_type = osi->object_size_type;
+ if ((object_size_type & OST_MINIMUM) == 0)
+ {
+ if (object_sizes[object_size_type][varno] < val)
+ return object_sizes_set_force (osi, varno, val);
+ }
+ else
+ {
+ if (object_sizes[object_size_type][varno] > val)
+ return object_sizes_set_force (osi, varno, val);
+ }
+ return false;
+}
+
/* Initialize OFFSET_LIMIT variable. */
static void
init_offset_limit (void)
@@ -247,7 +312,7 @@ addr_object_size (struct object_size_info *osi, const_tree ptr,
collect_object_sizes_for (osi, var);
if (bitmap_bit_p (computed[object_size_type],
SSA_NAME_VERSION (var)))
- sz = object_sizes[object_size_type][SSA_NAME_VERSION (var)];
+ sz = object_sizes_get (osi, SSA_NAME_VERSION (var));
else
sz = unknown (object_size_type);
}
@@ -582,14 +647,14 @@ compute_builtin_object_size (tree ptr, int object_size_type,
return false;
}
+ struct object_size_info osi;
+ osi.object_size_type = object_size_type;
if (!bitmap_bit_p (computed[object_size_type], SSA_NAME_VERSION (ptr)))
{
- struct object_size_info osi;
bitmap_iterator bi;
unsigned int i;
- if (num_ssa_names > object_sizes[object_size_type].length ())
- object_sizes[object_size_type].safe_grow (num_ssa_names, true);
+ object_sizes_grow (object_size_type);
if (dump_file)
{
fprintf (dump_file, "Computing %s %sobject size for ",
@@ -601,7 +666,6 @@ compute_builtin_object_size (tree ptr, int object_size_type,
osi.visited = BITMAP_ALLOC (NULL);
osi.reexamine = BITMAP_ALLOC (NULL);
- osi.object_size_type = object_size_type;
osi.depths = NULL;
osi.stack = NULL;
osi.tos = NULL;
@@ -678,8 +742,7 @@ compute_builtin_object_size (tree ptr, int object_size_type,
if (dump_file)
{
EXECUTE_IF_SET_IN_BITMAP (osi.visited, 0, i, bi)
- if (object_sizes[object_size_type][i]
- != unknown (object_size_type))
+ if (!object_sizes_unknown_p (object_size_type, i))
{
print_generic_expr (dump_file, ssa_name (i),
dump_flags);
@@ -689,7 +752,7 @@ compute_builtin_object_size (tree ptr, int object_size_type,
((object_size_type & OST_MINIMUM) ? "minimum"
: "maximum"),
(object_size_type & OST_SUBOBJECT) ? "sub" : "",
- object_sizes[object_size_type][i]);
+ object_sizes_get (&osi, i));
}
}
@@ -697,7 +760,7 @@ compute_builtin_object_size (tree ptr, int object_size_type,
BITMAP_FREE (osi.visited);
}
- *psize = object_sizes[object_size_type][SSA_NAME_VERSION (ptr)];
+ *psize = object_sizes_get (&osi, SSA_NAME_VERSION (ptr));
return *psize != unknown (object_size_type);
}
@@ -710,8 +773,7 @@ expr_object_size (struct object_size_info *osi, tree ptr, tree value)
unsigned int varno = SSA_NAME_VERSION (ptr);
unsigned HOST_WIDE_INT bytes;
- gcc_assert (object_sizes[object_size_type][varno]
- != unknown (object_size_type));
+ gcc_assert (!object_sizes_unknown_p (object_size_type, varno));
gcc_assert (osi->pass == 0);
if (TREE_CODE (value) == WITH_SIZE_EXPR)
@@ -726,16 +788,7 @@ expr_object_size (struct object_size_info *osi, tree ptr, tree value)
else
bytes = unknown (object_size_type);
- if ((object_size_type & OST_MINIMUM) == 0)
- {
- if (object_sizes[object_size_type][varno] < bytes)
- object_sizes[object_size_type][varno] = bytes;
- }
- else
- {
- if (object_sizes[object_size_type][varno] > bytes)
- object_sizes[object_size_type][varno] = bytes;
- }
+ object_sizes_set (osi, varno, bytes);
}
@@ -750,22 +803,12 @@ call_object_size (struct object_size_info *osi, tree ptr, gcall *call)
gcc_assert (is_gimple_call (call));
- gcc_assert (object_sizes[object_size_type][varno]
- != unknown (object_size_type));
+ gcc_assert (!object_sizes_unknown_p (object_size_type, varno));
gcc_assert (osi->pass == 0);
bytes = alloc_object_size (call, object_size_type);
- if ((object_size_type & OST_MINIMUM) == 0)
- {
- if (object_sizes[object_size_type][varno] < bytes)
- object_sizes[object_size_type][varno] = bytes;
- }
- else
- {
- if (object_sizes[object_size_type][varno] > bytes)
- object_sizes[object_size_type][varno] = bytes;
- }
+ object_sizes_set (osi, varno, bytes);
}
@@ -776,12 +819,11 @@ unknown_object_size (struct object_size_info *osi, tree ptr)
{
int object_size_type = osi->object_size_type;
unsigned int varno = SSA_NAME_VERSION (ptr);
- unsigned HOST_WIDE_INT bytes = unknown (object_size_type);
- gcc_checking_assert (object_sizes[object_size_type][varno] != bytes);
+ gcc_checking_assert (!object_sizes_unknown_p (object_size_type, varno));
gcc_checking_assert (osi->pass == 0);
- object_sizes[object_size_type][varno] = bytes;
+ object_sizes_set (osi, varno, unknown (object_size_type));
}
@@ -796,38 +838,24 @@ merge_object_sizes (struct object_size_info *osi, tree dest, tree orig,
unsigned int varno = SSA_NAME_VERSION (dest);
unsigned HOST_WIDE_INT orig_bytes;
- if (object_sizes[object_size_type][varno] == unknown (object_size_type))
+ if (object_sizes_unknown_p (object_size_type, varno))
return false;
if (offset >= offset_limit)
{
- object_sizes[object_size_type][varno] = unknown (object_size_type);
+ object_sizes_set (osi, varno, unknown (object_size_type));
return false;
}
if (osi->pass == 0)
collect_object_sizes_for (osi, orig);
- orig_bytes = object_sizes[object_size_type][SSA_NAME_VERSION (orig)];
+ orig_bytes = object_sizes_get (osi, SSA_NAME_VERSION (orig));
if (orig_bytes != unknown (object_size_type))
orig_bytes = (offset > orig_bytes)
? HOST_WIDE_INT_0U : orig_bytes - offset;
- if ((object_size_type & OST_MINIMUM) == 0)
- {
- if (object_sizes[object_size_type][varno] < orig_bytes)
- {
- object_sizes[object_size_type][varno] = orig_bytes;
- osi->changed = true;
- }
- }
- else
- {
- if (object_sizes[object_size_type][varno] > orig_bytes)
- {
- object_sizes[object_size_type][varno] = orig_bytes;
- osi->changed = true;
- }
- }
+ osi->changed = object_sizes_set (osi, varno, orig_bytes);
+
return bitmap_bit_p (osi->reexamine, SSA_NAME_VERSION (orig));
}
@@ -859,7 +887,7 @@ plus_stmt_object_size (struct object_size_info *osi, tree var, gimple *stmt)
else
gcc_unreachable ();
- if (object_sizes[object_size_type][varno] == unknown (object_size_type))
+ if (object_sizes_unknown_p (object_size_type, varno))
return false;
/* Handle PTR + OFFSET here. */
@@ -890,16 +918,7 @@ plus_stmt_object_size (struct object_size_info *osi, tree var, gimple *stmt)
else
bytes = unknown (object_size_type);
- if ((object_size_type & OST_MINIMUM) == 0)
- {
- if (object_sizes[object_size_type][varno] < bytes)
- object_sizes[object_size_type][varno] = bytes;
- }
- else
- {
- if (object_sizes[object_size_type][varno] > bytes)
- object_sizes[object_size_type][varno] = bytes;
- }
+ object_sizes_set (osi, varno, bytes);
return false;
}
@@ -918,7 +937,7 @@ cond_expr_object_size (struct object_size_info *osi, tree var, gimple *stmt)
gcc_assert (gimple_assign_rhs_code (stmt) == COND_EXPR);
- if (object_sizes[object_size_type][varno] == unknown (object_size_type))
+ if (object_sizes_unknown_p (object_size_type, varno))
return false;
then_ = gimple_assign_rhs2 (stmt);
@@ -929,7 +948,7 @@ cond_expr_object_size (struct object_size_info *osi, tree var, gimple *stmt)
else
expr_object_size (osi, var, then_);
- if (object_sizes[object_size_type][varno] == unknown (object_size_type))
+ if (object_sizes_unknown_p (object_size_type, varno))
return reexamine;
if (TREE_CODE (else_) == SSA_NAME)
@@ -975,8 +994,10 @@ collect_object_sizes_for (struct object_size_info *osi, tree var)
{
if (bitmap_set_bit (osi->visited, varno))
{
- object_sizes[object_size_type][varno]
- = (object_size_type & OST_MINIMUM) ? -1 : 0;
+ /* Initialize to 0 for maximum size and M1U for minimum size so that
+ it gets immediately overridden. */
+ object_sizes_set_force (osi, varno,
+ unknown (object_size_type ^ OST_MINIMUM));
}
else
{
@@ -1047,7 +1068,7 @@ collect_object_sizes_for (struct object_size_info *osi, tree var)
case GIMPLE_ASM:
/* Pointers defined by __asm__ statements can point anywhere. */
- object_sizes[object_size_type][varno] = unknown (object_size_type);
+ object_sizes_set (osi, varno, unknown (object_size_type));
break;
case GIMPLE_NOP:
@@ -1056,7 +1077,7 @@ collect_object_sizes_for (struct object_size_info *osi, tree var)
expr_object_size (osi, var, SSA_NAME_VAR (var));
else
/* Uninitialized SSA names point nowhere. */
- object_sizes[object_size_type][varno] = unknown (object_size_type);
+ object_sizes_set (osi, varno, unknown (object_size_type));
break;
case GIMPLE_PHI:
@@ -1067,8 +1088,7 @@ collect_object_sizes_for (struct object_size_info *osi, tree var)
{
tree rhs = gimple_phi_arg (stmt, i)->def;
- if (object_sizes[object_size_type][varno]
- == unknown (object_size_type))
+ if (object_sizes_unknown_p (object_size_type, varno))
break;
if (TREE_CODE (rhs) == SSA_NAME)
@@ -1083,8 +1103,7 @@ collect_object_sizes_for (struct object_size_info *osi, tree var)
gcc_unreachable ();
}
- if (! reexamine
- || object_sizes[object_size_type][varno] == unknown (object_size_type))
+ if (! reexamine || object_sizes_unknown_p (object_size_type, varno))
{
bitmap_set_bit (computed[object_size_type], varno);
bitmap_clear_bit (osi->reexamine, varno);
@@ -1124,7 +1143,7 @@ check_for_plus_in_loops_1 (struct object_size_info *osi, tree var,
--sp;
bitmap_clear_bit (osi->reexamine, *sp);
bitmap_set_bit (computed[osi->object_size_type], *sp);
- object_sizes[osi->object_size_type][*sp] = 0;
+ object_sizes_set_force (osi, *sp, 0);
if (*sp == varno)
break;
}
@@ -1248,7 +1267,7 @@ init_object_sizes (void)
for (object_size_type = 0; object_size_type < OST_END; object_size_type++)
{
- object_sizes[object_size_type].safe_grow (num_ssa_names, true);
+ object_sizes_grow (object_size_type);
computed[object_size_type] = BITMAP_ALLOC (NULL);
}
@@ -1265,7 +1284,7 @@ fini_object_sizes (void)
for (object_size_type = 0; object_size_type < OST_END; object_size_type++)
{
- object_sizes[object_size_type].release ();
+ object_sizes_release (object_size_type);
BITMAP_FREE (computed[object_size_type]);
}
}
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