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mn10300.md (cmpsi): Tell reload to disregard the first alternative.

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* config/mn10300/mn10300.md (cmpsi): Tell reload to disregard the
first alternative.

From-SVN: r41355
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Alexandre Oliva 2001-04-14 11:09:21 +00:00 committed by Alexandre Oliva
parent f2d43953d7
commit 81df85c483
2 changed files with 14 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2001-04-14 Alexandre Oliva <aoliva@redhat.com>
* config/mn10300/mn10300.md (cmpsi): Tell reload to disregard the
first alternative.
2001-04-14 Alan Modra <amodra@one.net.au> 2001-04-14 Alan Modra <amodra@one.net.au>
* pa.c (force_mode): New function. * pa.c (force_mode): New function.

10
gcc/config/mn10300/mn10300.md
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@ -718,9 +718,17 @@
;; but will have the proper effect on cc0. Using d0 is arbitrary; any ;; but will have the proper effect on cc0. Using d0 is arbitrary; any
;; data register would work.) ;; data register would work.)
;; Even though the first alternative would be preferrable if it can
;; possibly match, reload must not be given the opportunity to attempt
;; to use it. It assumes that such matches can only occur when one of
;; the operands is used for input and the other for output. Since
;; this is not the case, it abort()s. Indeed, such a reload cannot be
;; possibly satisfied, so just mark the alternative with a `!', so
;; that it is not considered by reload.
(define_insn "cmpsi" (define_insn "cmpsi"
[(set (cc0) [(set (cc0)
(compare (match_operand:SI 0 "register_operand" "*d*a*x,dax") (compare (match_operand:SI 0 "register_operand" "!*d*a*x,dax")
(match_operand:SI 1 "nonmemory_operand" "*0,daxi")))] (match_operand:SI 1 "nonmemory_operand" "*0,daxi")))]
"" ""
"@ "@