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* [gcc r11-10013] tree-optimization/105250 - adjust fold_convertible_p PR105140 fix
@ 2022-05-19 14:02 Richard Biener
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From: Richard Biener @ 2022-05-19 14:02 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:0be87cc23d0b0e07656e94137978971555bebbb3
commit r11-10013-g0be87cc23d0b0e07656e94137978971555bebbb3
Author: Richard Biener <rguenther@suse.de>
Date: Wed Apr 13 08:52:57 2022 +0200
tree-optimization/105250 - adjust fold_convertible_p PR105140 fix
The following reverts the original PR105140 fix and goes for instead
applying the additional fold_convert constraint for VECTOR_TYPE
conversions also to fold_convertible_p. I did not try sanitizing
all of this at this point.
2022-04-13 Richard Biener <rguenther@suse.de>
PR tree-optimization/105250
* fold-const.c (fold_convertible_p): Revert
r12-7979-geaaf77dd85c333, instead check for size equality
of the vector types involved.
* gcc.dg/pr105250.c: New testcase.
(cherry picked from commit 4e892de6774f86540d36385701aa7b0a2bba5155)
Diff:
---
gcc/fold-const.c | 7 +++----
gcc/testsuite/gcc.dg/pr105250.c | 29 +++++++++++++++++++++++++++++
2 files changed, 32 insertions(+), 4 deletions(-)
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 4657bf28f95..572d70b039d 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -2350,13 +2350,12 @@ build_zero_vector (tree type)
return build_vector_from_val (type, t);
}
-/* Returns true, if ARG, an operand or a type, is convertible to TYPE
- using a NOP_EXPR. */
+/* Returns true, if ARG is convertible to TYPE using a NOP_EXPR. */
bool
fold_convertible_p (const_tree type, const_tree arg)
{
- const_tree orig = TYPE_P (arg) ? arg : TREE_TYPE (arg);
+ const_tree orig = TREE_TYPE (arg);
if (type == orig)
return true;
@@ -2388,7 +2387,7 @@ fold_convertible_p (const_tree type, const_tree arg)
return (VECTOR_TYPE_P (orig)
&& known_eq (TYPE_VECTOR_SUBPARTS (type),
TYPE_VECTOR_SUBPARTS (orig))
- && fold_convertible_p (TREE_TYPE (type), TREE_TYPE (orig)));
+ && tree_int_cst_equal (TYPE_SIZE (type), TYPE_SIZE (orig)));
default:
return false;
diff --git a/gcc/testsuite/gcc.dg/pr105250.c b/gcc/testsuite/gcc.dg/pr105250.c
new file mode 100644
index 00000000000..665dd95d8cb
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr105250.c
@@ -0,0 +1,29 @@
+/* { dg-do compile } */
+/* { dg-options "-w -Wno-psabi -O2" } */
+
+typedef int __attribute__((__vector_size__(4))) T;
+typedef int __attribute__((__vector_size__(8))) U;
+typedef int __attribute__((__vector_size__(16))) V;
+typedef int __attribute__((__vector_size__(32))) W;
+typedef _Float32 __attribute__((__vector_size__(16))) F;
+typedef _Float64 __attribute__((__vector_size__(32))) G;
+void foo();
+
+foo(int, int, int, int, U, U, V, V, W, W, int,
+ T, int, U, U, V, V, W, W, T,
+ T, int, U, U, V, V, W, W, T,
+ T, int, W, W, T, T, int, int, int,
+ int, int, int, W, int, int, int, int, int, int,
+ V, W, T, int, int, U, F, int, int, int,
+ int, int, int, G)
+{
+ foo(0, 0, 0, 0, (U){}, (U){}, (V){}, (V){}, (W){},
+ (W){}, 2, (T){}, 0, 0, 0, 0, (U){}, (U){},
+ (V){}, (V){}, (W){}, (W){}, (T){},
+ (T){}, 0, 0, 0, 0, (U){}, (U){}, (V){},
+ (V){}, (W){}, (W){}, (T){}, (T){}, 0, 0, 0,
+ 0, 0, 0, (T){},
+ (T){}, (W){},
+ (W){}, (T){}, (T){}, 0, 0, 0, 0, 0, 0, (W){},
+ (V){}, (W){}, (T){}, 0, 0, (U){}, (F){});
+}
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