Hi!
On vectors, even when they satisfy
integer_zerop/integer_onep/integer_all_onesp, the routine doesn't
handle vector types and it is questionable if it would be a good
optimization for them anyway. We don't handle complex there either,
so this patch limits it to integral/pointer types.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2012-06-25 Jakub Jelinek <ja...@redhat.com>
PR tree-optimization/53748
* tree-ssa-phiopt.c (conditional_replacement): Only optimize
if arg0/arg1 have integral or pointer types.
* gcc.c-torture/compile/pr53748.c: New test.
--- gcc/tree-ssa-phiopt.c.jj 2012-06-25 08:38:26.000000000 +0200
+++ gcc/tree-ssa-phiopt.c 2012-06-25 12:10:23.473357828 +0200
@@ -615,8 +615,12 @@ conditional_replacement (basic_block con
bool neg;
/* FIXME: Gimplification of complex type is too hard for now. */
- if (TREE_CODE (TREE_TYPE (arg0)) == COMPLEX_TYPE
- || TREE_CODE (TREE_TYPE (arg1)) == COMPLEX_TYPE)
+ /* We aren't prepared to handle vectors either (and it is a question
+ if it would be worthwhile anyway). */
+ if (!(INTEGRAL_TYPE_P (TREE_TYPE (arg0))
+ || POINTER_TYPE_P (TREE_TYPE (arg0)))
+ || !(INTEGRAL_TYPE_P (TREE_TYPE (arg1))
+ || POINTER_TYPE_P (TREE_TYPE (arg1))))
return false;
/* The PHI arguments have the constants 0 and 1, or 0 and -1, then
--- gcc/testsuite/gcc.c-torture/compile/pr53748.c.jj 2012-06-25
11:54:15.959820372 +0200
+++ gcc/testsuite/gcc.c-torture/compile/pr53748.c 2012-06-25
11:43:35.000000000 +0200
@@ -0,0 +1,9 @@
+/* PR tree-optimization/53748 */
+
+typedef unsigned int V __attribute__ ((__vector_size__ (sizeof (int) * 4)));
+
+void
+foo (int x, V *y)
+{
+ *y = x ? ((V) { ~0U, ~0U, ~0U, ~0U }) : ((V) { 0, 0, 0, 0 });
+}
Jakub
