sync compilers with Plan 9

remove 1[acl] 2[acl]

1 files changed, 0 insertions, 1057 deletions

diff --git a/utils/1c/peep.c b/utils/1c/peep.c
deleted file mode 100644
index 7583da5d..00000000
--- a/utils/1c/peep.c
+++ /dev/null
@@ -1,1057 +0,0 @@
-#include "gc.h"
-
-void
-peep(void)
-{
-	Reg *r, *r1, *r2;
-	Prog *p, *p1;
-	int t, s;
-/*
- * complete R structure
- */
-	t = 0;
-	for(r=firstr; r!=R; r=r1) {
-		r1 = r->link;
-		if(r1 == R)
-			break;
-		p = r->prog->link;
-		while(p != r1->prog)
-		switch(p->as) {
-		default:
-			r2 = rega();
-			r->link = r2;
-			r2->link = r1;
-
-			r2->prog = p;
-			r2->p1 = r;
-			r->s1 = r2;
-			r2->s1 = r1;
-			r1->p1 = r2;
-
-			r = r2;
-			t++;
-
-		case ADATA:
-		case AGLOBL:
-		case ANAME:
-		case ASIGNAME:
-			p = p->link;
-		}
-	}
-
-loop1:
-	/*
-	 * propigate move's by renaming
-	 */
-	t = 0;
-	for(r=firstr; r!=R; r=r->link) {
-		p = r->prog;
-		if(p->as == AMOVL || p->as == AFMOVEF || p->as == AFMOVED)
-		if(regtyp(p->from.type))
-		if(anyvar(&p->to)) {
-			if(copyprop(r)) {
-				excise(r);
-				t++;
-			} else
-			if(subprop(r) && copyprop(r)) {
-				excise(r);
-				t++;
-			}
-		}
-	}
-	if(t)
-		goto loop1;
-	for(r=firstr; r!=R; r=r->link) {
-		p = r->prog;
-		/*
-		 * convert (A) ... A++ into (A)++
-		 * and     A-- ... (A) into --(A)
-		 */
-		t = aregind(&p->from);
-		if(t == D_NONE)
-			goto out1;
-		s = asize(p->as);
-		if(s == 0)
-			goto out1;
-		r1 = findop(r, t, AADDL, s);
-		if(r1 != R) {
-			if(usedin(t, &p->to))
-				goto out1;
-			p->from.type += I_INDINC - I_INDIR;
-			excise(r1);
-			goto out1;
-		}
-		r1 = findop(r, t, ASUBL, s);
-		if(r1 != R) {
-			p->from.type += I_INDDEC - I_INDIR;
-			excise(r1);
-		}
-	out1:
-		t = aregind(&p->to);
-		if(t == D_NONE)
-			goto out2;
-		s = asize(p->as);
-		if(s == 0)
-			goto out2;
-		r1 = findop(r, t, AADDL, s);
-		if(r1 != R) {
-			p->to.type += I_INDINC - I_INDIR;
-			excise(r1);
-			goto out2;
-		}
-		r1 = findop(r, t, ASUBL, s);
-		if(r1 != R) {
-			if(usedin(t, &p->from))
-				goto out2;
-			p->to.type += I_INDDEC - I_INDIR;
-			excise(r1);
-		}
-	out2:
-		/*
-		 * get rid of unneeded save/restore CCR
-		 */
-		if(p->from.type == D_CCR) {
-			r1 = findccr(r);
-			if(r1 != R) {
-				excise(r);
-				excise(r1);
-			}
-		}
-		switch(p->as) {
-		case ATSTB:
-		case ATSTW:
-		case ATSTL:
-			if(findtst(r, r->prog, 0))
-				excise(r);
-		}
-		/*
-		 * turn TSTB (A); BLT; ORB $128,(A) into TAS (A); BLT; NOP
-		 */
-		if(p->as == ATSTB && (r1 = r->s1)) {
-			if((r1->prog->as == ABLT && (r2 = r1->s1)) ||
-			   (r1->prog->as == ABGE && (r2 = r1->s2))) {
-				p1 = r2->prog;
-				if(p1->as == AORB)
-				if(p1->from.type == D_CONST)
-				if(p1->from.offset == 128)
-				if(r1 == uniqp(r2))
-				if(tasas(&p->to, &p1->to)) {
-					p->as = ATAS;
-					excise(r2);
-				}
-			}
-		}
-	}
-}
-
-void
-excise(Reg *r)
-{
-
-	p = r->prog;
-	p->as = ANOP;
-	p->from = zprog.from;
-	p->to = zprog.to;
-}
-
-Reg*
-uniqp(Reg *r)
-{
-	Reg *r1;
-
-	r1 = r->p1;
-	if(r1 == R) {
-		r1 = r->p2;
-		if(r1 == R || r1->p2link != R)
-			return R;
-	} else
-		if(r->p2 != R)
-			return R;
-	return r1;
-}
-
-Reg*
-uniqs(Reg *r)
-{
-	Reg *r1;
-
-	r1 = r->s1;
-	if(r1 == R) {
-		r1 = r->s2;
-		if(r1 == R)
-			return R;
-	} else
-		if(r->s2 != R)
-			return R;
-	return r1;
-}
-
-/*
- * chase backward all cc setting.
- * returns 1 if all set same.
- */
-int
-findtst(Reg *r0, Prog *rp, int n)
-{
-	Reg *r;
-	int c;
-
-loop:
-	n++;
-	if(n >= 10)
-		return 0;
-	for(r=r0->p2; r!=R; r=r->p2link) {
-		c = setcc(r->prog, rp);
-		if(c > 0)
-			continue;
-		if(c == 0)
-			return 0;
-		if(findtst(r, rp, n) == 0)
-			return 0;
-	}
-	r = r0->p1;
-	if(r == R)
-		return 1;
-	c = setcc(r->prog, rp);
-	if(c > 0)
-		return 1;
-	if(c == 0)
-		return 0;
-	r0 = r;
-	goto loop;
-}
-
-/*
- * tests cc
- * returns -1 if no change
- * returns 1 if set the same
- * returns 0 if set different
- */
-int
-setcc(Prog *p, Prog *rp)
-{
-	int s;
-
-	s = asize(rp->as);
-	switch(p->as) {
-	default:
-		if(debug['P'])
-			print("unknown setcc %A\n", p->as);
-		break;
-
-	case ACMPB:
-	case ACMPW:
-	case ACMPL:
-	case ABSR:
-		return 0;
-
-	case ABRA:
-	case ABGE:
-	case ABNE:
-	case ABLE:
-	case ABEQ:
-	case ABHI:
-	case ABLS:
-	case ABMI:
-	case ABPL:
-	case ABGT:
-	case ABLT:
-	case ABCC:
-	case ABCS:
-	case APEA:
-	case ALEA:
-	case ANOP:
-
-	case AFADDD:
-	case AFMULD:
-	case AFDIVD:
-	case AFSUBD:
-	case AFADDF:
-	case AFMULF:
-	case AFDIVF:
-	case AFSUBF:
-	case AADJSP:
-		return -1;
-
-	case AADDW:
-	case AADDL:
-	case ASUBW:
-	case ASUBL:
-	case ACLRL:
-	case ACLRW:
-		if(p->to.type >= D_A0 && p->to.type < D_A0+8)
-			goto areg;
-
-	case AADDB:
-	case ASUBB:
-	case AANDB:
-	case AANDW:
-	case AANDL:
-	case AORB:
-	case AORW:
-	case AORL:
-	case AEORB:
-	case AEORW:
-	case AEORL:
-	case ALSLB:
-	case ALSLW:
-	case ALSLL:
-	case ALSRB:
-	case ALSRW:
-	case ALSRL:
-	case AASLB:
-	case AASLW:
-	case AASLL:
-	case AASRB:
-	case AASRW:
-	case AASRL:
-	case ATSTB:
-	case ATSTW:
-	case ATSTL:
-	case ANEGB:
-	case ANEGW:
-	case ANEGL:
-	case ACLRB:
-		if(asize(p->as) != s)
-			break;
-		if(compat(&rp->to, &p->to))
-			return 1;
-		break;
-
-	case AMOVW:
-	case AMOVL:
-		if(p->to.type >= D_A0 && p->to.type < D_A0+8)
-			goto areg;
-	case AMOVB:
-		if(asize(p->as) != s)
-			break;
-		if(compat(&rp->to, &p->to))
-			return 1;
-		if(compat(&rp->to, &p->from))
-			return 1;
-	}
-	return 0;
-
-areg:
-	if((rp->to.type&D_MASK) == p->to.type)
-		return 0;
-	return -1;
-}
-
-int
-compat(Adr *a, Adr *b)
-{
-	int o;
-
-	o = a->type;
-	if((o >= D_R0 && o < D_R0+NREG) ||
-	   (o >= D_A0 && o < D_A0+NREG))
-		return o == b->type;
-	o &= D_MASK;
-	if(o >= D_A0 && o < D_A0+NREG) {
-		if(o != (b->type&D_MASK))
-			return 0;
-		if(a->offset != b->offset)
-			return 0;
-		o = a->type & I_MASK;
-		if(o == I_INDIR) {
-			o = b->type & I_MASK;
-			if(o == I_INDIR || o == I_INDDEC)
-				return 1;
-			return 0;
-		}
-		if(o == I_INDINC) {
-			o = b->type & I_MASK;
-			if(o == I_INDIR) {
-				b->type += I_INDINC-I_INDIR;
-				return 1;
-			}
-			if(o == I_INDDEC) {
-				b->type += I_INDIR-I_INDDEC;
-				return 1;
-			}
-			return 0;
-		}
-	}
-	return 0;
-}
-
-int
-aregind(Adr *a)
-{
-	int t;
-
-	t = a->type;
-	if(t >= (D_A0|I_INDIR) && t < ((D_A0+NREG)|I_INDIR))
-	while(a->offset == 0)
-		return t & D_MASK;
-	return D_NONE;
-}
-
-int
-asize(int a)
-{
-
-	switch(a) {
-	case AFTSTD:
-	case AFMOVED:
-	case AFADDD:
-	case AFSUBD:
-	case AFMULD:
-	case AFDIVD:
-	case AFCMPD:
-	case AFNEGD:
-		return 8;
-
-	case AFTSTF:
-	case AFMOVEF:
-	case AFADDF:
-	case AFSUBF:
-	case AFMULF:
-	case AFDIVF:
-	case AFCMPF:
-	case AFNEGF:
-
-	case ACLRL:
-	case ATSTL:
-	case AMOVL:
-	case AADDL:
-	case ASUBL:
-	case ACMPL:
-	case AANDL:
-	case AORL:
-	case AEORL:
-	case ALSLL:
-	case ALSRL:
-	case AASLL:
-	case AASRL:
-	case ANEGL:
-		return 4;
-
-	case ACLRW:
-	case ATSTW:
-	case AMOVW:
-	case AADDW:
-	case ASUBW:
-	case ACMPW:
-	case AANDW:
-	case AORW:
-	case AEORW:
-	case ALSLW:
-	case ALSRW:
-	case AASLW:
-	case AASRW:
-	case ANEGW:
-		return 2;
-
-	case ACLRB:
-	case ATSTB:
-	case AMOVB:
-	case AADDB:
-	case ASUBB:
-	case ACMPB:
-	case AANDB:
-	case AORB:
-	case AEORB:
-	case ALSLB:
-	case ALSRB:
-	case AASLB:
-	case AASRB:
-	case ANEGB:
-		return 1;
-	}
-	if(debug['P'])
-		print("unknown asize %A\n", p->as);
-	return 0;
-}
-
-int
-usedin(int t, Adr *a)
-{
-
-	if((a->type&D_MASK) == t)
-		return 1;
-	return 0;
-}
-
-Reg*
-findccr(Reg *r)
-{
-	Prog *p;
-
-	for(;;) {
-		r = uniqs(r);
-		if(r == R)
-			break;
-		p = r->prog;
-		if(p->to.type == D_CCR)
-			return r;
-		if(setccr(p))
-			break;
-	}
-	return R;
-}
-
-int
-setccr(Prog *p)
-{
-
-	switch(p->as) {
-	case ANOP:
-		return 0;
-
-	case AADDL:
-	case AMOVL:
-	case ACLRL:
-		if(p->to.type >= D_A0 && p->to.type < D_A0+8)
-			return 0;
-	}
-	return 1;
-}
-
-Reg*
-findop(Reg *r, int t, int o, int s)
-{
-	Prog *p;
-	Reg *r1;
-
-	for(;;) {
-		if(o == AADDL) {
-			r1 = uniqs(r);
-			if(r1 == R)
-				break;
-			if(uniqp(r1) != r)
-				break;
-		} else {
-			r1 = uniqp(r);
-			if(r1 == R)
-				break;
-			if(uniqs(r1) != r)
-				break;
-		}
-		r = r1;
-		p = r->prog;
-		if(usedin(t, &p->from))
-			break;
-		if(usedin(t, &p->to)) {
-			if(p->as == o)
-			if(p->to.type == t)
-			if(p->from.type == D_CONST)
-			if(p->from.offset == s)
-				return r;
-			break;
-		}
-	}
-	return R;
-}
-
-int
-regtyp(int t)
-{
-
-	if(t >= D_R0 && t < D_R0+8)
-		return 1;
-	if(t >= D_A0 && t < D_A0+8)
-		return 1;
-	if(t >= D_F0 && t < D_F0+8)
-		return 1;
-	return 0;
-}
-
-int
-anyvar(Adr *a)
-{
-
-	if(regtyp(a->type))
-		return 1;
-	return 0;
-}
-
-/*
- * the idea is to substitute
- * one register for another
- * from one MOV to another
- *	MOV	a, R0
- *	ADD	b, R0	/ no use of R1
- *	MOV	R0, R1
- * would be converted to
- *	MOV	a, R1
- *	ADD	b, R1
- *	MOV	R1, R0
- * hopefully, then the former or latter MOVL
- * will be eliminated by copy propagation.
- */
-int
-subprop(Reg *r0)
-{
-	Prog *p;
-	Adr *v1, *v2;
-	Reg *r;
-	int t;
-
-	p = r0->prog;
-	v1 = &p->from;
-	if(!regtyp(v1->type))
-		return 0;
-	v2 = &p->to;
-	if(!regtyp(v2->type))
-		return 0;
-	for(r=uniqp(r0); r!=R; r=uniqp(r)) {
-		if(uniqs(r) == R)
-			break;
-		p = r->prog;
-		switch(p->as) {
-		case ADIVUW:	/* these set Rn and Rn+1 */
-		case ADIVUL:
-		case ADIVSW:
-		case ADIVSL:
-		case ABSR:
-			return 0;
-
-		case AFMOVED:
-		case AFMOVEF:
-		case AMOVL:
-			if(p->to.type == v1->type)
-				goto gotit;
-		}
-		if(copyau(&p->from, v2) || copyau(&p->to, v2))
-			break;
-		if(copysub(&p->from, v1, v2, p, 0) || copysub(&p->to, v1, v2, p, 0))
-			break;
-	}
-	return 0;
-
-gotit:
-	copysub(&p->to, v1, v2, p, 1);
-	if(debug['P']) {
-		print("gotit: %D->%D\n%P", v1, v2, r->prog);
-		if(p->from.type == v2->type)
-			print(" excise");
-		print("\n");
-	}
-	if(p->from.type == v2->type)
-		excise(r);
-	for(r=uniqs(r); r!=r0; r=uniqs(r)) {
-		p = r->prog;
-		copysub(&p->from, v1, v2, p, 1);
-		copysub(&p->to, v1, v2, p, 1);
-		if(debug['P'])
-			print("%P\n", r->prog);
-	}
-	t = v1->type;
-	v1->type = v2->type;
-	v2->type = t;
-	if(debug['P'])
-		print("%P last\n", r->prog);
-	return 1;
-}
-
-/*
- * The idea is to remove redundant copies.
- *	v1->v2	F=0
- *	(use v2	s/v2/v1/)*
- *	set v1	F=1
- *	use v2	return fail
- *	-----------------
- *	v1->v2	F=0
- *	(use v2	s/v2/v1/)*
- *	set v1	F=1
- *	set v2	return success
- */
-int
-copyprop(Reg *r0)
-{
-	Prog *p;
-	Adr *v1, *v2;
-	Reg *r;
-
-	p = r0->prog;
-	v1 = &p->from;
-	v2 = &p->to;
-	if(copyas(v1, v2))
-		return 1;
-	for(r=firstr; r!=R; r=r->link)
-		r->active = 0;
-	return copy1(v1, v2, r0->s1, 0);
-}
-
-int
-copy1(Adr *v1, Adr *v2, Reg *r, int f)
-{
-	int t;
-
-	if(r->active) {
-		if(debug['P'])
-			print("copyret 1\n");
-		return 1;
-	}
-	r->active = 1;
-	if(debug['P'])
-		print("copy %D->%D\n", v1, v2);
-	for(; r != R; r = r->s1) {
-		if(debug['P'])
-			print("%P", r->prog);
-		if(!f && uniqp(r) == R) {
-			f = 1;
-			if(debug['P'])
-				print("; merge; f=%d", f);
-		}
-		t = copyu(r->prog, v2, A);
-		switch(t) {
-		case 2:	/* rar, cant split */
-			if(debug['P'])
-				print("; rar return 0\n");
-			return 0;
-		case 3:	/* set */
-			if(debug['P'])
-				print("; set; return 1\n");
-			return 1;
-		case 1:	/* used, substitute */
-		case 4:	/* use and set */
-			if(f) {
-				if(debug['P'])
-					print("; used and f; return 0\n");
-				return 0;
-			}
-			if(copyu(r->prog, v2, v1)) {
-				if(debug['P'])
-					print("; sub fail; return 0\n");
-				return 0;
-			}
-			if(debug['P'])
-				print("; substitute");
-			if(t == 4) {
-				if(debug['P'])
-					print("; used and set; return 1\n");
-				return 1;
-			}
-			break;
-		}
-		if(!f) {
-			t = copyu(r->prog, v1, A);
-			if(!f && (t == 2 || t == 3 || t == 4)) {
-				if(debug['P'])
-					print("; f set used");
-				f = 1;
-			}
-		}
-		if(debug['P'])
-			print("\n");
-		if(r->s2)
-			if(!copy1(v1, v2, r->s2, f))
-				return 0;
-	}
-	return 1;
-}
-
-/*
- * return
- * 1 if v only used (and substitute),
- * 2 if read-alter-rewrite
- * 3 if set
- * 4 if set and used
- * 0 otherwise (not touched)
- */
-int
-copyu(Prog *p, Adr *v, Adr *s)
-{
-	int t;
-
-	switch(p->as) {
-
-	default:
-		if(debug['P'])
-			print("unknown op %A\n", p->as);
-		return 2;
-
-	case APEA:	/* rhs addr */
-		if(copyas(&p->to, v))
-			return 2;
-		goto caseread;
-
-	case ALEA:	/* lhs addr, rhs store */
-		if(copyas(&p->from, v))
-			return 2;
-
-	case AMOVL:	/* rhs store */
-	case ACLRL:
-	case AFMOVEF:
-	case AFMOVED:
-	case AFMOVEB:
-	case AFMOVEW:
-	case AFMOVEL:
-	case ANOP:
-		if(copyas(&p->to, v)) {
-			if(s != A)
-				return copysub(&p->from, v, s, p, 1);
-			if(copyau(&p->from, v))
-				return 4;
-			return 3;
-		}
-		goto caseread;
-			
-	case AADDL:	/* rhs rar */
-	case AADDW:
-	case AADDB:
-	case ASUBL:
-	case ASUBW:
-	case ASUBB:
-	case AANDL:
-	case AANDW:
-	case AANDB:
-	case AORL:
-	case AORW:
-	case AORB:
-	case AEORL:
-	case AEORW:
-	case AEORB:
-	case AASRL:
-	case AASRW:
-	case AASRB:
-	case AASLL:
-	case AASLW:
-	case AASLB:
-	case ALSRL:
-	case ALSRW:
-	case ALSRB:
-	case ANOTL:
-	case ANOTW:
-	case ANOTB:
-	case ANEGL:
-	case ANEGW:
-	case ANEGB:
-	case AEXTBL:
-	case AEXTWL:
-	case AEXTBW:
-
-	case AMULSL:
-	case AMULUL:
-
-	case AMOVW:	/* only sets part of register */
-	case AMOVB:
-	case ACLRW:
-	case ACLRB:
-
-	case AFADDD:
-	case AFMULD:
-	case AFDIVD:
-	case AFSUBD:
-	case AFNEGD:
-	case AFADDF:
-	case AFMULF:
-	case AFDIVF:
-	case AFSUBF:
-	case AFNEGF:
-		if(copyas(&p->to, v))
-			return 2;
-		goto caseread;
-
-	case ADBF:	/* lhs rar */
-		if(copyas(&p->from, v))
-			return 2;
-		goto caseread;
-
-	case ACMPL:	/* read only */
-	case ACMPW:
-	case ACMPB:
-	case AFCMPF:
-	case AFCMPD:
-	case ATSTL:
-	case ATSTW:
-	case ATSTB:
-	case AFTSTF:
-	case AFTSTD:
-	caseread:
-		if(s != A) {
-			if(copysub(&p->from, v, s, p, 1))
-				return 1;
-			return copysub(&p->to, v, s, p, 1);
-		}
-		if(copyau(&p->from, v))
-			return 1;
-		if(copyau(&p->to, v))
-			return 1;
-		break;
-
-	case ABRA:	/* no reference */
-	case ABGE:
-	case ABNE:
-	case ABLE:
-	case ABEQ:
-	case ABHI:
-	case ABLS:
-	case ABMI:
-	case ABPL:
-	case ABGT:
-	case ABLT:
-	case ABCC:
-	case ABCS:
-
-	case AFBEQ:
-	case AFBNE:
-	case AFBGT:
-	case AFBGE:
-	case AFBLE:
-	case AFBLT:
-
-	case AADJSP:
-	case ACASEW:
-		break;
-
-	case ADIVUW:	/* these set Rn and Rn+1 */
-	case ADIVUL:
-	case ADIVSW:
-	case ADIVSL:
-		t = v->type;
-		if(t == p->to.type || t == p->to.type+1)
-			return 2;
-		goto caseread;
-
-	case ARTS:	/* funny */
-		t = v->type;
-		if(t == D_R0 || t == D_F0)
-			return 2;
-		if(t >= D_R0 && t < D_R0+NREG)
-		if(t-D_R0 > exregoffset)
-			return 2;
-		if(t >= D_A0 && t < D_A0+NREG)
-		if(t-D_A0 > exaregoffset)
-			return 2;
-		if(t >= D_F0 && t < D_F0+NREG)
-		if(t-D_F0 > exfregoffset)
-			return 2;
-		return 3;
-
-	case ABSR:	/* funny */
-		t = v->type;
-		if(t >= D_R0 && t < D_R0+NREG)
-		if(t-D_R0 > exregoffset)
-			return 2;
-		if(t >= D_A0 && t < D_A0+NREG)
-		if(t-D_A0 > exaregoffset)
-			return 2;
-		if(t >= D_F0 && t < D_F0+NREG)
-		if(t-D_F0 > exfregoffset)
-			return 2;
-		if(copyau(&p->to, v))
-			return 2;
-		return 3;
-	}
-	return 0;
-}
-
-/*
- * direct reference,
- * could be set/use depending on
- * semantics
- */
-int
-copyas(Adr *a, Adr *v)
-{
-
-	if(a->type != v->type)
-		return 0;
-	if(regtyp(v->type))
-		return 1;
-	if(v->type == D_AUTO || v->type == D_PARAM) {
-		if(v->offset == a->offset)
-			return 1;
-		return 0;
-	}
-	return 0;
-}
-
-/*
- * indirect
- */
-int
-tasas(Adr *a, Adr *v)
-{
-	int t;
-
-	t = a->type;
-	if(t < I_INDIR+D_A0 && t >= I_INDIR+D_A0+8)
-		return 0;
-	if(v->type != t)
-		return 0;
-	if(a->displace != v->displace)
-		return 0;
-	return 1;
-}
-
-/*
- * either direct or indirect
- */
-int
-copyau(Adr *a, Adr *v)
-{
-	int t;
-
-	if(copyas(a, v))
-		return 1;
-	t = v->type;
-	if(regtyp(t)) {
-		if((a->type & D_MASK) == t)
-			return 1;
-	}
-	return 0;
-}
-
-/*
- * substitute s for v in a
- * return failure to substitute
- */
-int
-copysub(Adr *a, Adr *v, Adr *s, Prog *p, int f)
-{
-	int t;
-
-	if(copyas(a, v)) {
-		t = s->type;
-		if(t >= D_F0 && t < D_F0+8) {
-			if(f)
-				a->type = t;
-			return 0;
-		}
-		if(t >= D_R0 && t < D_R0+8) {
-			if(f)
-				a->type = t;
-			return 0;
-		}
-		if(!(t >= D_A0 && t < D_A0+8))
-			return 1;
-		switch(p->as) {
-		default:
-			return 1;
-
-		case AMOVL:
-		case AMOVW:
-		case ACMPL:
-		case ACMPW:
-			break;
-
-		case AADDL:
-		case AADDW:
-		case ASUBL:
-		case ASUBW:
-			if(a == &p->from && !regtyp(p->to.type))
-				return 1;
-			break;
-		}
-		if(f)
-			a->type = t;
-		return 0;
-	}
-	t = v->type;
-	if(regtyp(t)) {
-		if((a->type & D_MASK) == t) {
-			if((s->type ^ t) & ~(NREG-1))
-				return 1;
-			if(f)
-				a->type = (a->type & ~D_MASK) | s->type;
-			return 0;
-		}
-		return 0;
-	}
-	return 0;
-}