[3/4] IBM Z: gen-vect-11/32: Set min-vect-loop-bound param back to default

Message ID 20191105133454.8188-4-krebbel@linux.ibm.com
State New
Headers show
Series
  • IBM Z: Fix a few testsuite problems
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Commit Message

Andreas Krebbel Nov. 5, 2019, 1:34 p.m.
In the Z backend we still set min-vect-loop-bound to 2 to work around
corner cases where awkward epilogue code gets generated in the
vectorizer.  This has a particular bad impact when vectorizing loops
with a low iteration count.  Due to this we do not vectorize the loop
in gen-vect-11/32 - what actually is a pity.

The patch sets min-vect-loop-bound back to the default value of 0 in
order to enable vectorization.

2019-11-05  Andreas Krebbel  <krebbel@linux.ibm.com>

	* gcc.dg/tree-ssa/gen-vect-11.c: Add --param min-vect-loop-bound=0
	for IBM Z.
	* gcc.dg/tree-ssa/gen-vect-11.c: Likewise.
---
 gcc/testsuite/gcc.dg/tree-ssa/gen-vect-11.c | 6 +++++-
 gcc/testsuite/gcc.dg/tree-ssa/gen-vect-32.c | 4 ++++
 2 files changed, 9 insertions(+), 1 deletion(-)

-- 
2.23.0

Patch

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/gen-vect-11.c b/gcc/testsuite/gcc.dg/tree-ssa/gen-vect-11.c
index 650e73a5ee8..dd1c0ac3eba 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/gen-vect-11.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/gen-vect-11.c
@@ -1,6 +1,10 @@ 
 /* { dg-do run { target vect_cmdline_needed } } */
 /* { dg-options "-O2 -ftree-vectorize -fwrapv -fdump-tree-vect-details -fvect-cost-model=dynamic" } */
-/* { dg-options "-O2 -ftree-vectorize -fwrapv -fdump-tree-vect-details -fvect-cost-model=dynamic -mno-sse" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-additional-options "-mno-sse" { target { i?86-*-* x86_64-*-* } } } */
+/* The IBM Z backend sets the min-vect-loop-bound param to 2 to avoid
+   awkward epilogue code generation in some cases.  This line needs to
+   be removed after finding an alternate way to fix this.  */
+/* { dg-additional-options "--param min-vect-loop-bound=0" { target { s390*-*-* } } } */
 
 #include <stdlib.h>
 
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/gen-vect-32.c b/gcc/testsuite/gcc.dg/tree-ssa/gen-vect-32.c
index c4bee19b75a..378dd0b831c 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/gen-vect-32.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/gen-vect-32.c
@@ -1,6 +1,10 @@ 
 /* { dg-do run { target vect_cmdline_needed } } */
 /* { dg-options "-O2 -fno-tree-loop-distribute-patterns -ftree-vectorize -fdump-tree-vect-details -fno-vect-cost-model" } */
 /* { dg-additional-options "-mno-sse" { target { i?86-*-* x86_64-*-* } } } */
+/* The IBM Z backend sets the min-vect-loop-bound param to 2 to avoid
+   awkward epilogue code generation in some cases.  This line needs to
+   be removed after finding an alternate way to fix this.  */
+/* { dg-additional-options "--param min-vect-loop-bound=0" { target { s390*-*-* } } } */
 
 #include <stdlib.h>