testsuite: Fix gcc.target/powerpc/vsx-builtin-7.c test [PR119382]

The test vsx-builtin-7.c failed on powerpc64le-linux due to Identical
Code Folding (ICF) merging the functions insert_di_0_v2 and insert_di_0.
This behavior was introduced by commit r15-7961-gdc47161c1f32c3, which
enhanced alias analysis in ao_compare::compare_ao_refs, enabling the
compiler to identify and optimize structurally identical functions. As a
result, the compiler replaced insert_di_0_v2 with a tail call to
insert_di_0, altering the expected test behavior.

This patch adds -fno-ipa-icf to the test's dg-options to disable ICF,
avoiding function merging and ensuring the test executes correctly.

2025-06-24  Jeevitha Palanisamy  <jeevitha@linux.ibm.com>

gcc/testsuite/
	PR testsuite/119382
	* gcc.target/powerpc/vsx-builtin-7.c: Add '-fno-ipa-icf' to dg-options.

(cherry picked from commit a1fb757342058111fddcdc5ca2f866c61e87c9b8)

diff --git a/gcc/testsuite/gcc.target/powerpc/vsx-builtin-7.c b/gcc/testsuite/gcc.target/powerpc/vsx-builtin-7.c
index 5095d5030fdd017532dcf98fc514ba3586da180e..312043b2c7f5623a7ce7a6c63bed71b686d6668d 100644 (file)
--- a/gcc/testsuite/gcc.target/powerpc/vsx-builtin-7.c
+++ b/gcc/testsuite/gcc.target/powerpc/vsx-builtin-7.c
@@ -1,8 +1,16 @@
 /* { dg-do compile { target { powerpc*-*-* } } } */
 /* { dg-skip-if "" { powerpc*-*-darwin* } } */
-/* { dg-options "-O2 -mdejagnu-cpu=power7 -fno-inline-functions" } */
+/* { dg-options "-O2 -mdejagnu-cpu=power7 -fno-inline-functions -fno-ipa-icf" } */
 /* { dg-require-effective-target powerpc_vsx } */
 
+/* PR testsuite/119382
+   Note: Added -fno-ipa-icf to disable Interprocedural Identical Code
+   Folding (ICF). Without this, insert_di_0_v2 is merged with insert_di_0
+   due to improved alias analysis introduced in commit r15-7961-gdc47161c1f32c3.
+   This results in the compiler replacing insert_di_0_v2 with a tail call to
+   insert_di_0, altering expected test behavior. Disabling ICF ensures correct
+   execution of the test.  */
+
 /* Test simple extract/insert/slat operations.  Make sure all types are
    supported with various options.  */