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combine.c (simplify_compare_const): Use GET_MODE_MASK to filter out unnecessary bits in the constant power of two case.

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2013-04-10  Chung-Ju Wu  <jasonwucj@gmail.com>

	* combine.c (simplify_compare_const): Use GET_MODE_MASK to filter out
	unnecessary bits in the constant power of two case.

From-SVN: r197666
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Chung-Ju Wu 2013-04-10 09:12:30 +00:00 committed by Chung-Ju Wu
parent abf9bfbc31
commit 34ab4a5b70
2 changed files with 8 additions and 2 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2013-04-10 Chung-Ju Wu <jasonwucj@gmail.com>
* combine.c (simplify_compare_const): Use GET_MODE_MASK to filter out
unnecessary bits in the constant power of two case.
2013-04-10 Richard Biener <rguenther@suse.de>
* tree-vect-slp.c (vect_get_and_check_slp_defs): Remove

5
gcc/combine.c
View File

@ -10759,8 +10759,9 @@ simplify_compare_const (enum rtx_code code, rtx op0, rtx *pop1)
&& (code == EQ || code == NE || code == GE || code == GEU
|| code == LT || code == LTU)
&& mode_width <= HOST_BITS_PER_WIDE_INT
&& exact_log2 (const_op) >= 0
&& nonzero_bits (op0, mode) == (unsigned HOST_WIDE_INT) const_op)
&& exact_log2 (const_op & GET_MODE_MASK (mode)) >= 0
&& (nonzero_bits (op0, mode)
== (unsigned HOST_WIDE_INT) (const_op & GET_MODE_MASK (mode))))
{
code = (code == EQ || code == GE || code == GEU ? NE : EQ);
const_op = 0;