From b75cb8388fb9b5f2393443d008bb46c522c5ec9b Mon Sep 17 00:00:00 2001
From: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date: Mon, 28 Mar 2016 12:53:53 -0400
Subject: new layout, put LICENSE in root

---
 src/copy.c | 159 -------------------------------------------------------------
 1 file changed, 159 deletions(-)
 delete mode 100644 src/copy.c

(limited to 'src/copy.c')

diff --git a/src/copy.c b/src/copy.c
deleted file mode 100644
index ef2d01d..0000000
--- a/src/copy.c
+++ /dev/null
@@ -1,159 +0,0 @@
-#include "all.h"
-
-typedef struct RList RList;
-struct RList {
-	int t;
-	RList *l;
-};
-
-static Ref
-copyof(Ref r, Ref *cp)
-{
-	if (rtype(r) == RTmp)
-		return cp[r.val];
-	else
-		return r;
-}
-
-static void
-update(Ref r, Ref rcp, Ref *cp, RList **w)
-{
-	RList *l;
-
-	if (!req(cp[r.val], rcp)) {
-		cp[r.val] = rcp;
-		l = emalloc(sizeof *l);
-		l->t = r.val;
-		l->l = *w;
-		*w = l;
-	}
-}
-
-static void
-visitphi(Phi *p, Ref *cp, RList **w)
-{
-	uint a;
-	Ref r, r1;
-
-	r = R;
-	for (a=0; a<p->narg; a++) {
-		r1 = copyof(p->arg[a], cp);
-		if (req(r1, R))
-			continue;
-		if (req(r, R) || req(r, r1))
-			r = r1;
-		else {
-			r = p->to;
-			break;
-		}
-	}
-	assert(!req(r, R));
-	update(p->to, r, cp, w);
-}
-
-static void
-visitins(Ins *i, Ref *cp, RList **w)
-{
-	Ref r;
-
-	if (i->op == OCopy) {
-		r = copyof(i->arg[0], cp);
-		update(i->to, r, cp, w);
-	} else if (!req(i->to, R)) {
-		assert(rtype(i->to) == RTmp);
-		update(i->to, i->to, cp, w);
-	}
-}
-
-void
-copy(Fn *fn)
-{
-	Blk *b;
-	Ref *cp, r;
-	RList *w, *w1;
-	Use *u, *u1;
-	Ins *i;
-	Phi *p, **pp;
-	uint a;
-	int t;
-
-	w = 0;
-	cp = emalloc(fn->ntmp * sizeof cp[0]);
-	for (b=fn->start; b; b=b->link) {
-		for (p=b->phi; p; p=p->link)
-			visitphi(p, cp, &w);
-		for (i=b->ins; i-b->ins < b->nins; i++)
-			visitins(i, cp, &w);
-	}
-	while ((w1=w)) {
-		t = w->t;
-		w = w->l;
-		free(w1);
-		u = fn->tmp[t].use;
-		u1 = u + fn->tmp[t].nuse;
-		for (; u<u1; u++)
-			switch (u->type) {
-			default:
-				diag("copy: invalid use");
-			case UPhi:
-				visitphi(u->u.phi, cp, &w);
-				break;
-			case UIns:
-				visitins(u->u.ins, cp, &w);
-				break;
-			case UJmp:
-				break;
-			}
-	}
-	for (b=fn->start; b; b=b->link) {
-		for (pp=&b->phi; (p=*pp);) {
-			r = cp[p->to.val];
-			if (!req(r, p->to)) {
-				*pp = p->link;
-				continue;
-			}
-			for (a=0; a<p->narg; a++)
-				if (rtype(p->arg[a]) == RTmp) {
-					r = cp[p->arg[a].val];
-					assert(!req(r, R));
-					p->arg[a] = r;
-				}
-			pp=&p->link;
-		}
-		for (i=b->ins; i-b->ins < b->nins; i++) {
-			r = cp[i->to.val];
-			if (!req(r, i->to)) {
-				*i = (Ins){.op = ONop};
-				continue;
-			}
-			for (a=0; a<2; a++)
-				if (rtype(i->arg[a]) == RTmp) {
-					r = cp[i->arg[a].val];
-					assert(!req(r, R));
-					i->arg[a] = r;
-				}
-		}
-		if (rtype(b->jmp.arg) == RTmp) {
-			r = cp[b->jmp.arg.val];
-			assert(!req(r, R));
-			b->jmp.arg = r;
-		}
-	}
-	if (debug['C']) {
-		fprintf(stderr, "\n> Copy information:");
-		for (t=Tmp0; t<fn->ntmp; t++) {
-			if (req(cp[t], R)) {
-				fprintf(stderr, "\n%10s not seen!",
-					fn->tmp[t].name);
-			}
-			else if (!req(cp[t], TMP(t))) {
-				fprintf(stderr, "\n%10s copy of ",
-					fn->tmp[t].name);
-				printref(cp[t], fn, stderr);
-			}
-		}
-		fprintf(stderr, "\n\n> After copy elimination:\n");
-		printfn(fn, stderr);
-	}
-	free(cp);
-}
-- 
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