gcc/gcc41-pr32912.patch

2007-08-20  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/32912
	* fold-const.c (fold_binary): Only optimize X | ~X and X ^ ~X for
	integral types.

	* gcc.dg/pr32912-1.c: New test.
	* gcc.dg/pr32912-2.c: New test.

--- gcc/fold-const.c.jj	2007-08-13 15:11:18.000000000 +0200
+++ gcc/fold-const.c	2007-08-20 15:49:05.000000000 +0200
@@ -8079,6 +8079,7 @@ fold_binary (enum tree_code code, tree t
 
       /* ~X | X is -1.  */
       if (TREE_CODE (arg0) == BIT_NOT_EXPR
+	  && INTEGRAL_TYPE_P (TREE_TYPE (arg1))
 	  && operand_equal_p (TREE_OPERAND (arg0, 0), arg1, 0))
 	{
 	  t1 = build_int_cst (type, -1);
@@ -8088,6 +8089,7 @@ fold_binary (enum tree_code code, tree t
 
       /* X | ~X is -1.  */
       if (TREE_CODE (arg1) == BIT_NOT_EXPR
+	  && INTEGRAL_TYPE_P (TREE_TYPE (arg0))
 	  && operand_equal_p (arg0, TREE_OPERAND (arg1, 0), 0))
 	{
 	  t1 = build_int_cst (type, -1);
@@ -8175,6 +8177,7 @@ fold_binary (enum tree_code code, tree t
 
       /* ~X ^ X is -1.  */
       if (TREE_CODE (arg0) == BIT_NOT_EXPR
+	  && INTEGRAL_TYPE_P (TREE_TYPE (arg1))
 	  && operand_equal_p (TREE_OPERAND (arg0, 0), arg1, 0))
 	{
 	  t1 = build_int_cst (type, -1);
@@ -8184,6 +8187,7 @@ fold_binary (enum tree_code code, tree t
 
       /* X ^ ~X is -1.  */
       if (TREE_CODE (arg1) == BIT_NOT_EXPR
+	  && INTEGRAL_TYPE_P (TREE_TYPE (arg0))
 	  && operand_equal_p (arg0, TREE_OPERAND (arg1, 0), 0))
 	{
 	  t1 = build_int_cst (type, -1);
--- gcc/testsuite/gcc.dg/pr32912-1.c.jj	2007-08-20 14:43:05.000000000 +0200
+++ gcc/testsuite/gcc.dg/pr32912-1.c	2007-08-20 14:43:23.000000000 +0200
@@ -0,0 +1,44 @@
+/* PR middle-end/32912 */
+/* { dg-do run } */
+/* { dg-options "-O2 -w" } */
+
+extern void abort (void);
+
+typedef int __m128i __attribute__ ((__vector_size__ (16)));
+
+__m128i a, b, c, d, e, f;
+
+void
+foo (__m128i x)
+{
+  a = x ^ ~x;
+  b = ~x ^ x;
+  c = x | ~x;
+  d = ~x | x;
+  e = x & ~x;
+  f = ~x & x;
+}
+
+int
+main (void)
+{
+  union { __m128i v; int i[sizeof (__m128i) / sizeof (int)]; } u;
+  int i;
+
+  for (i = 0; i < sizeof (u.i) / sizeof (u.i[0]); i++)
+    u.i[i] = i * 49 - 36;
+  foo (u.v);
+#define check(x, val) \
+  u.v = (x); \
+  for (i = 0; i < sizeof (u.i) / sizeof (u.i[0]); i++) \
+    if (u.i[i] != (val)) \
+      abort ()
+
+  check (a, ~0);
+  check (b, ~0);
+  check (c, ~0);
+  check (d, ~0);
+  check (e, 0);
+  check (f, 0);
+  return 0;
+}
--- gcc/testsuite/gcc.dg/pr32912-2.c.jj	2007-08-20 15:58:47.000000000 +0200
+++ gcc/testsuite/gcc.dg/pr32912-2.c	2007-08-20 15:55:32.000000000 +0200
@@ -0,0 +1,45 @@
+/* { dg-do run } */
+/* { dg-options "-O2 -w" } */
+
+extern void abort (void);
+
+typedef int __m128i __attribute__ ((__vector_size__ (16)));
+
+__m128i a, b, c, d, e, f;
+
+__m128i
+foo (void)
+{
+  __m128i x = { 0x11111111, 0x22222222, 0x44444444 };
+  return x;
+}
+
+__m128i
+bar (void)
+{
+  __m128i x = { 0x11111111, 0x22222222, 0x44444444 };
+  return ~x;
+}
+
+int
+main (void)
+{
+  union { __m128i v; int i[sizeof (__m128i) / sizeof (int)]; } u, v;
+  int i;
+
+  u.v = foo ();
+  v.v = bar ();
+  for (i = 0; i < sizeof (u.i) / sizeof (u.i[0]); i++)
+    {
+      if (u.i[i] != ~v.i[i])
+	abort ();
+      if (i < 3)
+	{
+	  if (u.i[i] != (0x11111111 << i))
+	    abort ();
+	}
+      else if (u.i[i])
+	abort ();
+    }
+  return 0;
+}