From: Jeff Law <jeffrey.law@oss.qualcomm.com>
Date: Tue, 6 Jan 2026 23:16:56 +0000 (-0700)
Subject: [PR target/123269] Adjust predcomm testcases to avoid vectorization
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8cd878a2f0a56059cac99c260771c283091d0601;p=thirdparty%2Fgcc.git

[PR target/123269] Adjust predcomm testcases to avoid vectorization

Thankfully this "bug" is just a case where after Robin's change we're
vectorizing cases we weren't before which in turn doesn't give predcom the
opportunity to optimize the code.

Like on existing predcom test we can restore the test's intent by using
-fno-tree-vectorize.

Tested x86_64 and the various crosses to ensure nothing regressed.  Pushing to
the trunk.

	PR target/123269

gcc/testsuite
	* gcc.dg/tree-ssa/predcom-dse-4.c: Disable vectorization.
	* gcc.dg/tree-ssa/predcom-dse-7.c: Likewise.
---

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/predcom-dse-4.c b/gcc/testsuite/gcc.dg/tree-ssa/predcom-dse-4.c
index 0d64bc72f82..5fdd39c3f79 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/predcom-dse-4.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/predcom-dse-4.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-O2 -fno-inline -fno-tree-loop-distribute-patterns -fpredictive-commoning -fdump-tree-pcom-details-blocks" } */
+/* { dg-options "-O2 -fno-tree-vectorize -fno-inline -fno-tree-loop-distribute-patterns -fpredictive-commoning -fdump-tree-pcom-details-blocks" } */
 
 int arr[105] = {2, 3, 5, 7, 11};
 int result0[10] = {2, 3, 5, 7, 11};
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/predcom-dse-7.c b/gcc/testsuite/gcc.dg/tree-ssa/predcom-dse-7.c
index cfe44a06ce4..24c06d59d18 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/predcom-dse-7.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/predcom-dse-7.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-O2 -fno-inline -fpredictive-commoning -fdump-tree-pcom-details-blocks" } */
+/* { dg-options "-O2 -fno-tree-vectorize -fno-inline -fpredictive-commoning -fdump-tree-pcom-details-blocks" } */
 
 int arr[105] = {2, 3, 5, 7, 11, 13, 17, 19};
 int result0[10] = {2, 3, 5, 7, 11, 13, 17, 19};