2005-11-28 Richard Guenther <rguenther@suse.de>

	* c-common.c (strict_aliasing_warning): Handle all
	component-ref like accesses.

	* gcc.dg/alias-9.c: New testcase.
	* g++.dg/warn/Wstrict-aliasing-7.C: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@107598 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 20 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/alias-9.c b/gcc/testsuite/gcc.dg/alias-9.c
new file mode 100644
index 00000000000..6e9d4a83e35
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/alias-9.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-Wstrict-aliasing -O2" } */
+
+int a[2];
+
+double *foo1(void)
+{
+  return (double *)a; /* { dg-warning "strict-aliasing" } */
+}
+
+double *foo2(void)
+{
+  return (double *)&a[0]; /* { dg-warning "strict-aliasing" } */
+}
+
+_Complex x;
+int *bar(void)
+{
+  return (int *)&__imag x; /* { dg-warning "strict-aliasing" } */
+}