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re PR middle-end/18908 (Missed folding opportunities with bools) 

2011-07-20  Richard Guenther  <rguenther@suse.de>

	PR middle-end/18908
	* tree.c (integer_all_onesp): Use TYPE_PRECISION, not mode precision.
	* tree-ssa-forwprop.c (simplify_bitwise_binary): Remove bogus
	ADDR_EXPR folding.  Canonicalize X ^ ~0 as ~X.

	* gcc.dg/tree-ssa/pr18908.c: New testcase.
	* gcc.dg/tree-ssa/bitwise-sink.c: Adjust.

From-SVN: r176510
This commit is contained in:
Richard Biener 2011-07-20 13:36:30 +00:00
parent dca412a1dd
commit c56db10056
1 changed files with 1 additions and 3 deletions
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4
gcc/tree.c
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@ -1759,9 +1759,7 @@ integer_all_onesp (const_tree expr)
if (!uns)
return 0;
/* Note that using TYPE_PRECISION here is wrong. We care about the
actual bits, not the (arbitrary) range of the type. */
prec = GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (expr)));
prec = TYPE_PRECISION (TREE_TYPE (expr));
if (prec >= HOST_BITS_PER_WIDE_INT)
{
HOST_WIDE_INT high_value;