PR optimization/11210

[pf3gnuchains/gcc-fork.git] / gcc / testsuite / gcc.dg / 20030626-1.c

diff --git a/gcc/testsuite/gcc.dg/20030626-1.c b/gcc/testsuite/gcc.dg/20030626-1.c
new file mode 100644 (file)
index 0000000..7d356e0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/20030626-1.c
@@ -0,0 +1,18 @@
+/* PR optimization/11210 */
+/* Originator: Guido Classen <guido@clagi.de> */
+/* Reduced testcase by Falk Hueffner <falk@debian.org> */
+/* { dg-do compile } */
+/* { dg-options "-O" } */
+
+/* Verify that the constant expressions folder doesn't
+   throw away the cast operation in the comparison.  */
+
+struct str { 
+  int head; 
+  char data[8];
+};
+
+int foo(struct str t)
+{
+  return t.data[0] || (unsigned char) t.data[2] != 130; /* { dg-bogus "comparison is always 1" } */
+}