[4.9] Switch gcc-4.9 to use google/gcc-4_9 branch.

This source drop uses svn version r212828 of google/gcc-4.9 branch.
We also cherry-picked r213062, r213063 and r213064 to fix windows
build issues.
All gcc-4.9 patches before July 3rd are ported to google/gcc-4.9.
The following prior commits has not been merged to google branch yet.
(They are included in this commit).
e7af147f979e657fe2df00808e5b4319b0e088c6,
baf87df3cb2683649ba7e9872362a7e721117c23, and
c231900e5dcc14d8296bd9f62b45997a49d4d5e7.

Change-Id: I4bea3ea470387ff751c2be4cb0d4a12059b9299b

1 files changed, 26 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/gcc.target/i386/patch-functions-sibling-call.c b/gcc-4.9/gcc/testsuite/gcc.target/i386/patch-functions-sibling-call.c
new file mode 100644
index 000000000..847a95ce6
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.target/i386/patch-functions-sibling-call.c
@@ -0,0 +1,26 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target lp64 } */
+/* -O2 forces a sibling call.  */
+/* { dg-options "-O2 -mpatch-functions-for-instrumentation" } */
+
+/* { dg-final { scan-assembler ".byte\t0xeb,0x09(.*).byte\t0x90" } } */
+
+/* Checks correct nop-bytes are generated just before a sibling call.  */
+/* { dg-final { scan-assembler ".byte\t0xeb,0x09(.*).byte\t0x90(.*)jmp" } } */
+
+/* Not instrumented as function has no loop and is small.  */
+__attribute__ ((noinline))
+int foo(int n)
+{
+  int x = 0;
+  return n + 10;
+}
+
+__attribute__ ((noinline))
+int bar(int n)
+{
+  /* Dummy loop.  */
+  while (--n)
+    n = n * 2;
+  return foo(n);
+}