testsuite: add testcase for recent alias fix

r15-7961-gdc47161c1f32c3 fixes a typo in ao_compare::compare_ao_refs
but there wasn't a testcase available at the time. Now there is.

Thanks to Andrew for the testcase.

gcc/testsuite/ChangeLog:
	PR testsuite/119382

	* gcc.dg/ipa/ipa-icf-40.c: New test.

Co-authored-by: Andrew Pinski <quic_apinski@quicinc.com>

diff --git a/gcc/testsuite/gcc.dg/ipa/ipa-icf-40.c b/gcc/testsuite/gcc.dg/ipa/ipa-icf-40.c
new file mode 100644 (file)
index 0000000..ab328ba
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/ipa/ipa-icf-40.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-ipa-icf-optimized" } */
+
+int c0 = 0;
+typedef int v4si __attribute__((vector_size(4*sizeof(int))));
+v4si a;
+int f()
+{
+        return a[c0];
+}
+int g()
+{
+        return a[c0];
+}
+
+/* { dg-final { scan-ipa-dump "optimized: Semantic equality hit:f/\[0-9+\]+->g/\[0-9+\]+" "icf" } } */