https://gcc.gnu.org/g:106f3cf414881d14a285a18919bfec14d2d1ca23
commit 106f3cf414881d14a285a18919bfec14d2d1ca23
Author: Alexandre Oliva <ol...@adacore.com>
Date: Sun Apr 21 17:24:18 2024 -0300
adjust vectorization expectations for ppc costmodel 76b
This test expects vectorization at power8+ because strict alignment is
not required for vectors. For power7, vectorization is not to take
place because it's not deemed profitable: 12 iterations would be
required to make it so.
But for power6 and below, the test's 10 iterations are enough to make
vectorization profitable, but the test doesn't expect this. Assuming
the decision is indeed appropriate, I'm adjusting the expectations.
for gcc/testsuite/ChangeLog
* gcc.dg/vect/costmodel/ppc/costmodel-vect-76b.c: Adjust
expectations for cpus below power7.
Diff:
---
gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-vect-76b.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-vect-76b.c
b/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-vect-76b.c
index cbbfbb24658..0dab2c08acd 100644
--- a/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-vect-76b.c
+++ b/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-vect-76b.c
@@ -46,9 +46,10 @@ int main (void)
return 0;
}
-/* Peeling to align the store is used. Overhead of peeling is too high. */
-/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target {
vector_alignment_reachable && {! vect_no_align} } } } } */
-/* { dg-final { scan-tree-dump-times "vectorization not profitable" 1 "vect" {
target { vector_alignment_reachable && {! vect_hw_misalign} } } } } */
+/* Peeling to align the store is used. Overhead of peeling is too high
+ for power7, but acceptable for earlier architectures. */
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target {
has_arch_pwr7 && { vector_alignment_reachable && {! vect_no_align} } } } } } */
+/* { dg-final { scan-tree-dump-times "vectorization not profitable" 1 "vect" {
target { has_arch_pwr7 && { vector_alignment_reachable && {! vect_hw_misalign}
} } } } } */
/* Versioning to align the store is used. Overhead of versioning is not too
high. */
-/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target {
vect_no_align || {! vector_alignment_reachable} } } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target {
vect_no_align || { {! vector_alignment_reachable} || {! has_arch_pwr7 } } } } }
} */
