Synchronize with google/gcc-4_9 to r224707 (from r214835)

Change-Id: I3d6f06fc613c8f8b6a82143dc44b7338483aac5d

1 files changed, 35 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/g++.dg/tree-ssa/pr63841.C b/gcc-4.9/gcc/testsuite/g++.dg/tree-ssa/pr63841.C
new file mode 100644
index 000000000..2a2c78f9f
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/g++.dg/tree-ssa/pr63841.C
@@ -0,0 +1,35 @@
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+#include <string>
+
+std::string __attribute__ ((noinline)) comp_test_write() {
+  std::string data;
+
+  for (int i = 0; i < 2; ++i) {
+    char b = 1 >> (i * 8);
+    data.append(&b, 1);
+  }
+
+  return data;
+}
+
+std::string __attribute__ ((noinline)) comp_test_write_good() {
+  std::string data;
+
+  char b;
+  for (int i = 0; i < 2; ++i) {
+    b = 1 >> (i * 8);
+    data.append(&b, 1);
+  }
+
+  return data;
+}
+
+int main() {
+  std::string good = comp_test_write_good();
+  std::string bad = comp_test_write();
+
+  if (good != bad)
+    __builtin_abort ();
+}