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/i386/pr9771-1.c b/gcc/testsuite/gcc.target/i386/pr9771-1.c
new file mode 100644
index 000000000..37ec49022
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr9771-1.c
@@ -0,0 +1,53 @@
+/* PR rtl-optimization/9771 */
+/* { dg-do run } */
+/* { dg-require-effective-target ilp32 } */
+/* { dg-options "-O2 -fomit-frame-pointer -ffixed-ebp" } */
+
+extern void abort(void);
+extern void exit(int);
+
+register long *B asm ("ebp");
+
+long x = 10;
+long y = 20;
+
+void bar(void)
+{
+  B = &y;
+}
+
+void foo()
+{
+  long *adr = B;
+  long save = *adr;
+
+  *adr = 123;
+
+  bar();
+
+  *adr = save;
+}
+
+/* This must not be inlined becuase main() requires the frame pointer
+   for stack alignment.  */
+void test(void) __attribute__((noinline));
+void test(void)
+{
+  B = &x;
+
+  foo();
+
+  if (x != 10 || y != 20)
+    abort();
+
+  /* We can't return, as our caller may assume %ebp is preserved!  */
+  /* We could save/restore it (like foo), but its easier to exit.  */
+  exit(0);
+}
+
+int main()
+{
+  test();
+  return 0;
+
+}