gcc/gcc41-pr32912.patch

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2007-08-21 19:33:58 +00:00
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 } */
2007-08-31 21:09:32 +00:00
+/* { dg-options "-O2 -w" } */
2007-08-21 19:33:58 +00:00
+
+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 } */
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+/* { dg-options "-O2 -w" } */
2007-08-21 19:33:58 +00:00
+
+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;
+}