obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 53 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/s390/20040305-1.c b/gcc/testsuite/gcc.target/s390/20040305-1.c
new file mode 100644
index 000000000..a241f041c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/s390/20040305-1.c
@@ -0,0 +1,53 @@
+
+/* The testcase failed due to corrupted alias information.
+   During the crossjump analyzing step the mem alias info of the
+   st instructions are merged and get copied during basic block
+   reordering which leads to an insn with wrong alias info.
+   The scheduler afterwards exchanges the mvc and st instructions 
+   not recognizing the anti dependence.  */
+/* { dg-do run } */
+/* { dg-options "-O3 -mtune=z990 -fno-inline" } */
+
+extern void exit (int);
+extern void abort (void);
+
+int f;
+int g;
+int h;
+
+int* x  = &f;
+int* p1 = &g;
+int* p2 = &h;
+
+int
+foo(void)
+{
+
+  if (*x == 0)
+    {
+      x = p1;         /* mvc - memory to memory */
+      p1 = (int*)0;   /* st  - register to memory */
+      return 1;
+    }
+  if (*x == 5)
+    {
+      f = 1;
+      g = 2;
+
+      p2 = (int*)0;   /* st */   
+      return 1;
+    }
+}
+
+int
+main (int argc, char** argv)
+{
+  foo ();
+
+  /* If the scheduler has exchanged the mvc and st instructions,
+     x is 0. The expected result is &g.  */
+  if (x == &g)
+    exit (0);
+  else
+    abort ();
+}