isel: fix flipped sub not being inplace

1 files changed, 1 insertions, 0 deletions

diff --git a/amd64/isel.c b/amd64/isel.c
index 23ce3d2..64cda27 100644
--- a/amd64/isel.c
+++ b/amd64/isel.c
@@ -459,6 +459,7 @@ sel(struct function *fn, struct instr *ins, struct block *blk, int *curi)
        if (isintcon(ins->l)) {
          /* sub imm, x -> sub x, imm; neg x */
          fixarg(&ins->l, ins, blk, curi);
+         ins->inplace = 1;
          struct instr sub = *ins;
          rswap(sub.l, sub.r);
          ins->op = Oneg;