The fix for PR106019 regressed slsr-39.c for -m32 -march=cascadelake
because we are now able to vectorise the code. (Whether the code model
should be allowing that is a different question -- the vectorised code
looked worse to me.)
The test runs at -O2 and predates vectorisation being enabled at -O2,
so this patch just adds -fno-tree-vectorize.
Tested on x86_64-linux-gnu. Perhaps bordering on the obvious,
but just in case: OK to install?
(We do still share the multiplication, it's just that with
vectorisation we share it fewer times.)
Richard
gcc/testsuite/
* gcc.dg/tree-ssa/slsr-39.c: Force vectorization off.
---
gcc/testsuite/gcc.dg/tree-ssa/slsr-39.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/slsr-39.c
b/gcc/testsuite/gcc.dg/tree-ssa/slsr-39.c
index 4a27ede1541..33e34fab7ca 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/slsr-39.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/slsr-39.c
@@ -6,7 +6,7 @@
*PINDEX: C1 + (C2 * C3) + C4 */
/* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-slsr-details" } */
+/* { dg-options "-O2 -fno-tree-vectorize -fdump-tree-slsr-details" } */
typedef int arr_2[50][50];
--
2.25.1
