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| author | Alexandre Oliva <aoliva@redhat.com> | 2001-04-14 11:09:21 +0000 |
|---|---|---|
| committer | Alexandre Oliva <aoliva@gcc.gnu.org> | 2001-04-14 11:09:21 +0000 |
| commit | 81df85c483545d4dc79fb375379ed8a98bb452bc (patch) | |
| tree | bb83f8f04206a12295f1bbc8ae54cdfae8e375c1 | |
| parent | f2d43953d7355b3570e7b833a03d7fe0c0310b9a (diff) | |
| download | gcc-81df85c483545d4dc79fb375379ed8a98bb452bc.zip gcc-81df85c483545d4dc79fb375379ed8a98bb452bc.tar.gz gcc-81df85c483545d4dc79fb375379ed8a98bb452bc.tar.bz2 | |
mn10300.md (cmpsi): Tell reload to disregard the first alternative.
* config/mn10300/mn10300.md (cmpsi): Tell reload to disregard the
first alternative.
From-SVN: r41355
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/mn10300/mn10300.md | 10 |
2 files changed, 14 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6990564..17451ef 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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> * pa.c (force_mode): New function. diff --git a/gcc/config/mn10300/mn10300.md b/gcc/config/mn10300/mn10300.md index 4f32cd4..7050f7a 100644 --- a/gcc/config/mn10300/mn10300.md +++ b/gcc/config/mn10300/mn10300.md @@ -718,9 +718,17 @@ ;; but will have the proper effect on cc0. Using d0 is arbitrary; any ;; 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" [(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")))] "" "@ |