From: Stefan Schulze Frielinghaus <stefansf@linux.ibm.com>
Date: Fri, 12 Apr 2024 07:20:53 +0000 (+0200)
Subject: testsuite: Fix loop-interchange-16.c
X-Git-Tag: basepoints/gcc-15~208
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b6c8259076a336e8082853ed6dda083c25a465d0;p=thirdparty%2Fgcc.git

testsuite: Fix loop-interchange-16.c

Prevent loop unrolling of the innermost loop because otherwise we are
left with no loop interchange for targets like s390 which have a more
aggressive loop unrolling strategy.

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-ssa/loop-interchange-16.c: Prevent loop unrolling
	of the innermost loop.
---

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/loop-interchange-16.c b/gcc/testsuite/gcc.dg/tree-ssa/loop-interchange-16.c
index 781555e085d1..bbcb14f9c6c5 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/loop-interchange-16.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/loop-interchange-16.c
@@ -11,6 +11,7 @@ double s231(int iterations)
 //    loop with data dependency
     for (int nl = 0; nl < 100*(iterations/LEN_2D); nl++) {
         for (int i = 0; i < LEN_2D; ++i) {
+#pragma GCC unroll 0
             for (int j = 1; j < LEN_2D; j++) {
                 aa[j][i] = aa[j - 1][i] + bb[j][i];
             }