1 files changed, 50 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/opt/temp1.C b/gcc/testsuite/g++.dg/opt/temp1.C
new file mode 100644
index 000000000..dc13f5162
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/temp1.C
@@ -0,0 +1,50 @@
+// PR c++/16405
+// { dg-options "-O2" } 
+// { dg-do run }
+
+// There should be exactly one temporary generated for the code in "f"
+// below when optimizing -- for the result of "b + c".  We have no
+// easy way of checking that directly, so we count the number of calls
+// to "memcpy", which is used on (some?) targets to copy temporaries.
+// If there is more than two calls (one for coping "*this" to "t", and
+// one for copying the temporary to "a"), then there are too many
+// temporaries. 
+
+int i;
+
+extern "C"
+void *memcpy (void *dest, const void *src, __SIZE_TYPE__ n)
+{
+  char *d = (char *) dest;
+  const char *s = (const char *) src;
+  while (n--)
+    d[n] = s[n];
+  ++i;
+  return dest;
+}
+ 
+struct T {
+#ifdef __SPU__
+  /* SPU returns aggregates up to 1172 bytes in registers.  */
+  int a[300];
+#else
+  int a[128];
+#endif
+  T &operator+=(T const &v) __attribute__((noinline));
+  T operator+(T const &v) const { T t = *this; t += v; return t; }
+};
+
+T &T::operator+=(T const &v) {
+  return *this;
+}
+
+T a, b, c;
+
+void f() { a = b + c; }
+
+int main () {
+  i = 0;
+  f();
+  if (i > 2)
+    return 1;
+}