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combine.c (combine_simplify_rtx): Update comment and remove erroneous test.

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* combine.c (combine_simplify_rtx): Update comment and
	remove erroneous test.

From-SVN: r44703
This commit is contained in:
Graham Stott 2001-08-08 06:15:20 +00:00 committed by Graham Stott
parent 33590f13b2
commit e61465ed1f
2 changed files with 7 additions and 3 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2001-08-08 Graham Stott <grahams@redhat.com>
* combine.c (combine_simplify_rtx): Update comment and
remove erroneous test.
2001-08-07 Neil Booth <neil@daikokuya.demon.co.uk>
* cppinit.c (cpp_finish): Pop the final buffer without comment.

5
gcc/combine.c
View File

@ -3856,13 +3856,12 @@ combine_simplify_rtx (x, op0_mode, last, in_dest)
XEXP (XEXP (x, 0), 1))))
return reversed;
/* (ashiftrt foo C) where C is the number of bits in FOO minus 1
is (lt foo (const_int 0)) if STORE_FLAG_VALUE is -1, so we can
/* (not (ashiftrt foo C)) where C is the number of bits in FOO minus 1
is (ge foo (const_int 0)) if STORE_FLAG_VALUE is -1, so we can
perform the above simplification. */
if (STORE_FLAG_VALUE == -1
&& GET_CODE (XEXP (x, 0)) == ASHIFTRT
&& XEXP (x, 1) == const1_rtx
&& GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
&& INTVAL (XEXP (XEXP (x, 0), 1)) == GET_MODE_BITSIZE (mode) - 1)
return gen_rtx_GE (mode, XEXP (XEXP (x, 0), 0), const0_rtx);