1 files changed, 0 insertions, 81 deletions
diff --git a/src/mem.c b/src/mem.c
deleted file mode 100644
index bda43d7..0000000
--- a/src/mem.c
+++ /dev/null
@@ -1,81 +0,0 @@
-#include "all.h"
-
-/* Memory optimization:
- *
- * - replace alloced slots used only in
- *   load/store operations
- *   Assumption: all the accesses have the
- *   same size (this could be wrong...)
- */
-
-/* require use, maintains use counts */
-void
-memopt(Fn *fn)
-{
-	Blk *b;
-	Ins *i, *l;
-	Tmp *t;
-	Use *u, *ue;
-	int a;
-
-	b = fn->start;
-	for (i=b->ins; i-b->ins < b->nins; i++) {
-		if (OAlloc > i->op || i->op > OAlloc1)
-			continue;
-		assert(NAlign == 3);
-		assert(rtype(i->to) == RTmp);
-		t = &fn->tmp[i->to.val];
-		for (u=t->use; u != &t->use[t->nuse]; u++) {
-			if (u->type != UIns)
-				goto NextIns;
-			l = u->u.ins;
-			if (!isload(l->op)
-			&& (!isstore(l->op) || req(i->to, l->arg[0])))
-				goto NextIns;
-		}
-		/* get rid of the alloc and replace uses */
-		*i = (Ins){.op = ONop};
-		t->ndef--;
-		ue = &t->use[t->nuse];
-		for (u=t->use; u!=ue; u++) {
-			l = u->u.ins;
-			if (isstore(l->op)) {
-				if (l->op == OStores)
-					l->cls = Kd;
-				else if (l->op == OStored)
-					l->cls = Kd;
-				else if (l->op == OStorel)
-					l->cls = Kl;
-				else
-					l->cls = Kw;
-				l->op = OCopy;
-				l->to = l->arg[1];
-				l->arg[1] = R;
-				t->nuse--;
-				t->ndef++;
-			} else
-				/* try to turn loads into copies so we
-				 * can eliminate them later */
-				switch(l->op) {
-				case OLoad:
-					l->op = OCopy;
-					break;
-				case OLoadsw:
-				case OLoaduw:
-					l->cls = Kw;
-					l->op = OCopy;
-					break;
-				default:
-					/* keep l->cls */
-					a = l->op - OLoadsw;
-					l->op = OExtsw + a;
-					break;
-				}
-		}
-	NextIns:;
-	}
-	if (debug['M']) {
-		fprintf(stderr, "\n> After memory optimization:\n");
-		printfn(fn, stderr);
-	}
-}