1 files changed, 0 insertions, 46 deletions
diff --git a/ir/ssa.c b/ir/ssa.c
deleted file mode 100644
index 6598fba..0000000
--- a/ir/ssa.c
+++ /dev/null
@@ -1,46 +0,0 @@
-#include "ir.h"
-
-void
-copyopt(struct function *fn)
-{
-   struct block *blk = fn->entry;
-
-   FREQUIRE(FNUSE);
-   do {
-      for (int i = 0; i < blk->phi.n; ++i) {
-         /* simplify same-arg phi */
-         int phi = blk->phi.p[i];
-         union ref *arg = phitab.p[instrtab[phi].l.i];
-         for (int j = 1; j < blk->npred; ++j) {
-            if (arg[j].bits != arg->bits) goto Next;
-         }
-         /* being conservative here because phis could have circular dependencies? */
-         if (arg->t != RTMP || instrtab[arg->i].op != Ophi) {
-            replcuses(mkref(RTMP, phi), *arg);
-            delphi(blk, i--);
-         }
-      Next:;
-      }
-      for (int i = 0; i < blk->ins.n; ++i) {
-         union ref var = mkref(RTMP, blk->ins.p[i]);
-         struct instr *ins = &instrtab[var.i];
-         enum irclass k;
-
-         if (ins->op == Ocopy) {
-            union ref arg = ins->l;
-            if (arg.t == RTMP) k = insrescls(instrtab[arg.i]);
-            else if (arg.t == RICON) k = cls2siz[ins->cls] == 4 ? KI32 : KI64;
-            else if (arg.t == RXCON) k = isnumcon(arg) ? concls(arg) : KPTR;
-            else continue;
-            if (ins->cls != k) continue;
-
-            replcuses(var, arg);
-            *ins = mkinstr(Onop,0,);
-            deluses(var.i);
-         }
-      }
-      delnops(blk);
-   } while ((blk = blk->lnext) != fn->entry);
-}
-
-/* vim:set ts=3 sw=3 expandtab: */