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, 23 insertions, 0 deletions

diff --git a/gcc/testsuite/c-c++-common/torture/pr42834.c b/gcc/testsuite/c-c++-common/torture/pr42834.c
new file mode 100644
index 000000000..a1ba49e46
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/torture/pr42834.c
@@ -0,0 +1,23 @@
+/* { dg-do run } */
+
+void __attribute__((noinline,noclone))
+foo(int *p, float *q) { __asm__ volatile ("" : : : "memory"); }
+
+int main()
+{
+  if (sizeof (int) == sizeof (float))
+    {
+      int i;
+      float f;
+      int *p;
+      /* Prevent i and f from being rewritten into SSA form.  */
+      foo (&i, &f);
+      i = 0;
+      f = 1.0;
+      p = (int *)&f;
+      __builtin_memcpy (&i, p, 4);
+      if (*(float *)&i != 1.0)
+	__builtin_abort ();
+    }
+  return 0;
+}