Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 38 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/g++.dg/init/new16.C b/gcc-4.9/gcc/testsuite/g++.dg/init/new16.C
new file mode 100644
index 000000000..c49f13f83
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/g++.dg/init/new16.C
@@ -0,0 +1,38 @@
+// { dg-do run }
+// { dg-options "-O2 -fstrict-aliasing" }
+
+// Test that we don't let TBAA reorder an assignment across a
+// placement new.
+// See PR 29286.
+
+typedef __SIZE_TYPE__ size_t;
+
+inline void* operator new(size_t, void* __p) throw() { return __p; }
+
+void __attribute__((noinline)) bar() {}
+
+long __attribute__((noinline)) foo(double *p, int n)
+{
+  long *f;
+  for (int i=0; i<n; ++i)
+  {
+    int *l = (int *)p;
+    *l = 0;
+    f = new (p) long;
+    *f = -1;
+  }
+  bar ();
+  return *f;
+}
+
+extern "C" void abort(void);
+int main()
+{
+  union {
+    int i;
+    long l;
+  } u;
+  if (foo((double *)&u, 1) != -1)
+    abort ();
+  return 0;
+}