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re PR rtl-optimization/27538 (execute/20030128-1.c FAILs)

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PR rtl-optimization/27538
	* combine.c (expand_compound_operation): Call gen_lowpart
	before calling simplify_shift_const.

From-SVN: r113763
This commit is contained in:
Roger Sayle 2006-05-14 16:07:12 +00:00 committed by Kazu Hirata
parent c505fc0613
commit 56106c2ed0
2 changed files with 16 additions and 8 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2006-05-14 Roger Sayle <roger@eyesopen.com>
PR rtl-optimization/27538
* combine.c (expand_compound_operation): Call gen_lowpart
before calling simplify_shift_const.
2006-05-14 Roger Sayle <roger@eyesopen.com>
PR rtl-optimization/22563

18
gcc/combine.c
View File

@ -5736,14 +5736,16 @@ expand_compound_operation (rtx x)
modewidth = GET_MODE_BITSIZE (GET_MODE (x));
if (modewidth + len >= pos)
tem = simplify_shift_const (NULL_RTX, unsignedp ? LSHIFTRT : ASHIFTRT,
GET_MODE (x),
simplify_shift_const (NULL_RTX, ASHIFT,
GET_MODE (x),
XEXP (x, 0),
modewidth - pos - len),
modewidth - len);
{
enum machine_mode mode = GET_MODE (x);
tem = gen_lowpart (mode, XEXP (x, 0));
if (!tem || GET_CODE (tem) == CLOBBER)
return x;
tem = simplify_shift_const (NULL_RTX, ASHIFT, mode,
tem, modewidth - pos - len);
tem = simplify_shift_const (NULL_RTX, unsignedp ? LSHIFTRT : ASHIFTRT,
mode, tem, modewidth - len);
}
else if (unsignedp && len < HOST_BITS_PER_WIDE_INT)
tem = simplify_and_const_int (NULL_RTX, GET_MODE (x),
simplify_shift_const (NULL_RTX, LSHIFTRT,