re PR c/49644 (post-increment of promoted operand is incorrect.)

	PR c/49644
	* typeck.c (cp_build_binary_op): For MULT_EXPR and TRUNC_DIV_EXPR with
	one non-complex and one complex argument, call save_expr on both
	operands.

	* g++.dg/torture/pr49644.C: New test.

From-SVN: r176006

gcc/cp/ChangeLog

+2011-07-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/49644
+	* typeck.c (cp_build_binary_op): For MULT_EXPR and TRUNC_DIV_EXPR with
+	one non-complex and one complex argument, call save_expr on both
+	operands.
+
 2011-07-06  Jason Merrill  <jason@redhat.com>
 
 	PR c++/49353

gcc/cp/typeck.c

@@ -4338,6 +4338,7 @@ cp_build_binary_op (location_t location,
 		{
 		case MULT_EXPR:
 		case TRUNC_DIV_EXPR:
+		  op1 = save_expr (op1);
 		  imag = build2 (resultcode, real_type, imag, op1);
 		  /* Fall through.  */
 		case PLUS_EXPR:
@@ -4356,6 +4357,7 @@ cp_build_binary_op (location_t location,
 	      switch (code)
 		{
 		case MULT_EXPR:
+		  op0 = save_expr (op0);
 		  imag = build2 (resultcode, real_type, op0, imag);
 		  /* Fall through.  */
 		case PLUS_EXPR:

gcc/testsuite/ChangeLog

 2011-07-07  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/49644
+	* g++.dg/torture/pr49644.C: New test.
+
+	PR c/49644
 	* gcc.c-torture/execute/pr49644.c: New test.
 
 2011-07-07  H.J. Lu  <hongjiu.lu@intel.com>

gcc/testsuite/g++.dg/torture/pr49644.C

+// PR c/49644
+// { dg-do run }
+
+extern "C" void abort ();
+
+int
+main ()
+{
+  _Complex double a[12], *c = a, s = 3.0 + 1.0i;
+  double b[12] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 }, *d = b;
+  int i;
+  for (i = 0; i < 6; i++)
+    *c++ = *d++ * s;
+  if (c != a + 6 || d != b + 6)
+    abort ();
+  return 0;
+}