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fix subreg optimization bug introduced 2002-05-25

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fix subreg optimization bug introduced 2002-05-25
	* combine.c (simplify_set): When optimizing a subreg src with a
	cc0 dest, use GET_MODE (src) for mask instead of inner_mode.

From-SVN: r57323
This commit is contained in:
Jim Wilson 2002-09-19 23:39:34 +00:00 committed by Jim Wilson
parent 2ee2d707a7
commit ff0765200c
2 changed files with 6 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-09-19 Jim Wilson <wilson@redhat.com>
* combine.c (simplify_set): When optimizing a subreg src with a
cc0 dest, use GET_MODE (src) for mask instead of inner_mode.
2002-09-19 Dale Johannesen <dalej@apple.com>
* combine.c (make_extraction): Don't create
invalid subreg.

2
gcc/combine.c
View File

@ -5229,7 +5229,7 @@ simplify_set (x)
if (GET_MODE_BITSIZE (inner_mode) <= HOST_BITS_PER_WIDE_INT
&& (nonzero_bits (inner, inner_mode)
< ((unsigned HOST_WIDE_INT) 1
<< (GET_MODE_BITSIZE (inner_mode) - 1))))
<< (GET_MODE_BITSIZE (GET_MODE (src)) - 1))))
{
SUBST (SET_SRC (x), inner);
src = SET_SRC (x);