1 files changed, 73 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/init/new19.C b/gcc/testsuite/g++.dg/init/new19.C
new file mode 100644
index 000000000..a25be7da7
--- /dev/null
+++ b/gcc/testsuite/g++.dg/init/new19.C
@@ -0,0 +1,73 @@
+// { dg-do compile }
+// { dg-options "-O2 -fstrict-aliasing -fdump-tree-pre-details" }
+
+// Make sure we hoist invariants out of the loop even in the presence
+// of placement new.  This is similar to code in tramp3d.
+
+typedef __SIZE_TYPE__ size_t;
+
+inline void* operator new(size_t, void* __p) throw() { return __p; }
+
+template <class T, int D>
+class Vector
+{
+public:
+   Vector()
+   {
+     for (int i = 0; i < D; ++i)
+        new (&x_m[i]) T();
+   }
+   T& operator[](int i) { return x_m[i]; }
+
+private:
+   T x_m[D];
+};
+
+struct sia
+{
+  int ai[3];
+};
+
+struct s
+{
+  struct si
+  {
+    sia* p;
+  } asi[3];
+  float* pd;
+};
+
+class c
+{
+  int foo(int, int, int);
+  s sm;
+};
+
+
+extern void bar(Vector<float, 3>*, int);
+int c::foo(int f1, int f2, int f3)
+{
+  float sum = 0;
+  for (int i = 0; i < 3; ++i)
+    {
+      for (int j = 0; j < 3; ++j)
+	{
+	  Vector<float, 3> v;
+	  v[0] = 1.0;
+	  v[1] = 2.0;
+	  v[2] = 3.0;
+	  for (int k = 0; k < 3; ++k)
+	    {
+	      float f = (f1 * this->sm.asi[0].p->ai[0]
+			 + f2 * this->sm.asi[1].p->ai[0]
+			 + f3 * this->sm.asi[2].p->ai[0]);
+	      sum += f * v[k];
+	    }
+	  *this->sm.pd = sum;
+	}
+    }
+  return sum;
+}
+
+// { dg-final { scan-tree-dump "Replaced.*->ai\\\[0\\\]" "pre" } }
+// { dg-final { cleanup-tree-dump "pre" } }