1 files changed, 27 insertions, 0 deletions
diff --git a/ir/ir.c b/ir/ir.c
index 553885d..8ae41a9 100644
--- a/ir/ir.c
+++ b/ir/ir.c
@@ -403,6 +403,33 @@ Shrink:
    return 1;
 }
 
+void
+filluses(struct function *fn)
+{
+   struct block *blk = fn->entry;
+
+   for (int i = 0; i < ninstr; ++i)
+      deluses(i);
+
+   do {
+      for (int i = 0; i < blk->phi.n; ++i) {
+         int ins = blk->phi.p[i];
+         union ref *phi = phitab.p[instrtab[ins].l.i];
+         for (int i = 0; i < blk->npred; ++i)
+            adduse(blk, ins, phi[i]);
+      }
+      for (int i = 0; i < blk->ins.n; ++i) {
+         int ins = blk->ins.p[i];
+         adduse(blk, ins, instrtab[ins].l);
+         adduse(blk, ins, instrtab[ins].r);
+      }
+      adduse(blk, USERJUMP, blk->jmp.arg[0]);
+      adduse(blk, USERJUMP, blk->jmp.arg[1]);
+   } while ((blk = blk->lnext) != fn->entry);
+
+   fn->prop |= FNUSE;
+}
+
 int
 newinstr(struct block *at, struct instr ins)
 {