diff options
| -rw-r--r-- | amd64/emit.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/amd64/emit.c b/amd64/emit.c index 29b6bbb..09b90d5 100644 --- a/amd64/emit.c +++ b/amd64/emit.c @@ -408,7 +408,7 @@ emitins(Ins i, Fn *fn, FILE *f) case Osub: /* we have to use the negation trick to handle * some 3-address subtractions */ - if (req(i.to, i.arg[1])) { + if (req(i.to, i.arg[1]) && !req(i.arg[0], i.to)) { if (KBASE(i.cls) == 0) emitf("neg%k %=", &i, fn, f); else |