1 files changed, 3 insertions, 6 deletions
diff --git a/ir/stack.c b/ir/stack.c
index 2420fdb..45023d1 100644
--- a/ir/stack.c
+++ b/ir/stack.c
@@ -10,20 +10,17 @@ lowerstack(struct function *fn)
    struct block *blk = fn->entry;
    do {
       for (int i = 0; i < blk->ins.n; ++i) {
-         uint alignlog2, siz;
          int t = blk->ins.p[i];
          struct instr *ins = &instrtab[t];
-         switch (ins->op) {
-         case Oalloca1: case Oalloca2: case Oalloca4: case Oalloca8: case Oalloca16:
-            alignlog2 = ins->op - Oalloca1;
+         if (oisalloca(ins->op)) {
+            uint alignlog2 = ins->op - Oalloca1;
             assert(ins->l.i > 0);
-            siz = ins->l.i << alignlog2;
+            uint siz = ins->l.i << alignlog2;
             fn->stksiz += siz;
             fn->stksiz = alignup(fn->stksiz, 1 << alignlog2);
             if (fn->stksiz > (1<<16)-1) error(NULL, "'%s' stack frame too big", fn->name);
             *ins = mkinstr(Onop,0,);
             replcuses(mkref(RTMP, t), mkref(RSTACK, fn->stksiz));
-            continue;
          }
       }
    } while ((blk = blk->lnext) != fn->entry);