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-rw-r--r--gcc/testsuite/gcc.dg/tree-ssa/20070302-1.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20070302-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20070302-1.c
new file mode 100644
index 000000000..4b148f23d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20070302-1.c
@@ -0,0 +1,45 @@
+/* { dg-do link } */
+/* { dg-options "-O2" } */
+
+struct A
+{
+ int x;
+ float y;
+};
+
+volatile float X, Y;
+
+int __attribute__ ((__noinline__))
+baz (struct A *z, struct A *y)
+{
+ z->x = (int) X;
+ z->y = Y;
+ y->x = (int) X;
+ y->y = Y;
+}
+
+
+struct A B;
+
+float foo (int i)
+{
+ struct A *p, x, y, z;
+
+ p = (i > 10) ? &x : &z;
+ x.y = 3.0;
+ p->x += baz (&z, &y);
+ X = z.y;
+ Y = p->y;
+
+ /* This predicate should always evaluate to false. The call to
+ baz() is not a clobbering site for x.y. The operand scanner was
+ considering it a clobbering site for x.y because x.y is in the
+ alias set of a call-clobbered memory tag. */
+ if (x.y != 3.0)
+ link_error ();
+}
+
+main(int argc, char **argv)
+{
+ foo (argc);
+}