• 设为首页
  • 点击收藏
  • 手机版
    手机扫一扫访问
    迪恩网络手机版
  • 关注官方公众号
    微信扫一扫关注
    公众号
登陆 注册

C++ copyas函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中copyas函数的典型用法代码示例。如果您正苦于以下问题：C++ copyas函数的具体用法？C++ copyas怎么用？C++ copyas使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了copyas函数的17个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: copysub

/*
 * substitute s for v in a
 * return failure to substitute
 */
int
copysub(Adr *a, Adr *v, Adr *s, int f)
{
	int t;

	if(copyas(a, v)) {
		t = s->type;
		if(t >= D_AX && t <= D_DI) {
			if(f)
				a->type = t;
		}
		return 0;
	}
	if(regtyp(v)) {
		t = v->type;
		if(a->type == t+D_INDIR) {
			if(s->type == D_BP && a->index != D_NONE)
				return 1;	/* can't use BP-base with index */
			if(f)
				a->type = s->type+D_INDIR;
//			return 0;
		}
		if(a->index == t) {
			if(f)
				a->index = s->type;
			return 0;
		}
		return 0;
	}
	return 0;
}
开发者ID:carriercomm，项目名称:legacy，代码行数:35，代码来源:peep.c


示例2: constprop

/*
 * The idea is to remove redundant constants.
 *	$c1->v1
 *	($c1->v2 s/$c1/v1)*
 *	set v1  return
 * The v1->v2 should be eliminated by copy propagation.
 */
void
constprop(Adr *c1, Adr *v1, Reg *r)
{
	Prog *p;

	if(debug['C'])
		print("constprop %D->%D\n", c1, v1);
	for(; r != R; r = r->s1) {
		p = r->prog;
		if(debug['C'])
			print("%P", p);
		if(uniqp(r) == R) {
			if(debug['C'])
				print("; merge; return\n");
			return;
		}
		if(p->as == AMOVW && copyas(&p->from, c1)) {
				if(debug['C'])
					print("; sub%D/%D", &p->from, v1);
				p->from = *v1;
		} else if(copyu(p, v1, A) > 1) {
			if(debug['C'])
				print("; %Dset; return\n", v1);
			return;
		}
		if(debug['C'])
			print("\n");
		if(r->s2)
			constprop(c1, v1, r->s2);
	}
}
开发者ID:JamesLinus，项目名称:LiteBSD-Ports，代码行数:38，代码来源:peep.c


示例3: copyau

/*
 * either direct or indirect
 */
static int
copyau(Adr *a, Adr *v)
{

	if(copyas(a, v))
		return 1;
	if(v->type == D_REG) {
		if(a->type == D_CONST && a->reg != NREG) {
			if(a->reg == v->reg)
				return 1;
		} else
		if(a->type == D_OREG) {
			if(a->reg == v->reg)
				return 1;
		} else
		if(a->type == D_REGREG || a->type == D_REGREG2) {
			if(a->reg == v->reg)
				return 1;
			if(a->offset == v->reg)
				return 1;
		} else
		if(a->type == D_SHIFT) {
			if((a->offset&0xf) == v->reg)
				return 1;
			if((a->offset&(1<<4)) && (a->offset>>8) == v->reg)
				return 1;
		}
	}
	return 0;
}
开发者ID:cloudaice，项目名称:golang，代码行数:33，代码来源:peep.c


示例4: copyau

/*
 * either direct or indirect
 */
int
copyau(Adr *a, Adr *v)
{

	if(copyas(a, v))
		return 1;
	if(v->type == D_REG)
		if(a->type == D_OREG)
			if(v->reg == a->reg)
				return 1;
	return 0;
}
开发者ID:99years，项目名称:plan9，代码行数:15，代码来源:peep.c


示例5: copyau

/*
 * either direct or indirect
 */
int
copyau(Adr *a, Adr *v)
{

	if(copyas(a, v))
		return 1;
	if(regtyp(v)) {
		if(a->type-D_INDIR == v->type)
			return 1;
		if(a->index == v->type)
			return 1;
	}
	return 0;
}
开发者ID:Ahmah2009，项目名称:golang，代码行数:17，代码来源:peep.c


示例6: copyprop

/*
 * 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
 */
static int
copyprop(Graph *g, Flow *r0)
{
	Prog *p;
	Adr *v1, *v2;

	USED(g);
	p = r0->prog;
	v1 = &p->from;
	v2 = &p->to;
	if(copyas(v1, v2))
		return 1;
	gactive++;
	return copy1(v1, v2, r0->s1, 0);
}
开发者ID:IsCoolEntertainment，项目名称:debpkg_golang，代码行数:27，代码来源:peep.c


示例7: copyprop

/*
 * 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);
}
开发者ID:99years，项目名称:plan9，代码行数:28，代码来源:peep.c


示例8: copyprop

/*
 * 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;

	if(debug['P'] && debug['v'])
		print("copyprop %P\n", r0->prog);
	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);
}
开发者ID:aigamo，项目名称:isucon3egg，代码行数:30，代码来源:peep.c


示例9: copyprop

/*
 * 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
 */
static int
copyprop(Graph *g, Flow *r0)
{
	Prog *p;
	Adr *v1, *v2;

	p = r0->prog;
	v1 = &p->from;
	v2 = &p->to;
	if(copyas(v1, v2))
		return 1;
	if(nactive < g->num) {
		nactive = g->num;
		active = realloc(active, g->num);
	}
 	memset(active, 0, g->num);
	return copy1(v1, v2, r0->s1, 0);
}
开发者ID:cloudaice，项目名称:golang，代码行数:30，代码来源:peep.c


示例10: copyau

/*
 * either direct or indirect
 */
int
copyau(Adr *a, Adr *v)
{

	if(copyas(a, v))
		return 1;
	if(v->type == D_REG) {
		if(a->type == D_OREG) {
			if(v->reg == a->reg)
				return 1;
		} else if(a->type == D_SHIFT) {
			if((a->offset&0xf) == v->reg)
				return 1;
			if((a->offset&(1<<4)) && (a->offset>>8) == v->reg)
				return 1;
		}
	}
	return 0;
}
开发者ID:BGCX261，项目名称:znos-git，代码行数:22，代码来源:peep.c


示例11: copyau

/*
 * either direct or indirect
 */
int
copyau(Adr *a, Adr *v)
{

	if(copyas(a, v)) {
		if(debug['P'] && debug['v'])
			print("\tcopyau: copyas returned 1\n");
		return 1;
	}
	if(regtyp(v)) {
		if(a->type-D_INDIR == v->type) {
			if(debug['P'] && debug['v'])
				print("\tcopyau: found indir use - return 1\n");
			return 1;
		}
		if(a->index == v->type) {
			if(debug['P'] && debug['v'])
				print("\tcopyau: found index use - return 1\n");
			return 1;
		}
	}
	return 0;
}
开发者ID:aigamo，项目名称:isucon3egg，代码行数:26，代码来源:peep.c


示例12: copyu

/*
 * 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)
{

	switch(p->as) {

	default:
		if(debug['P'])
			print("unknown op %A\n", p->as);
		/* SBBL; ADCL; FLD1; SAHF */
		return 2;


	case ANEGB:
	case ANEGW:
	case ANEGL:
	case ANEGQ:
	case ANOTB:
	case ANOTW:
	case ANOTL:
	case ANOTQ:
		if(copyas(&p->to, v))
			return 2;
		break;

	case ALEAL:	/* lhs addr, rhs store */
	case ALEAQ:
		if(copyas(&p->from, v))
			return 2;


	case ANOP:	/* rhs store */
	case AMOVL:
	case AMOVQ:
	case AMOVBLSX:
	case AMOVBLZX:
	case AMOVBQSX:
	case AMOVBQZX:
	case AMOVLQSX:
	case AMOVLQZX:
	case AMOVWLSX:
	case AMOVWLZX:
	case AMOVWQSX:
	case AMOVWQZX:
	case AMOVQL:

	case AMOVSS:
	case AMOVSD:
	case ACVTSD2SL:
	case ACVTSD2SQ:
	case ACVTSD2SS:
	case ACVTSL2SD:
	case ACVTSL2SS:
	case ACVTSQ2SD:
	case ACVTSQ2SS:
	case ACVTSS2SD:
	case ACVTSS2SL:
	case ACVTSS2SQ:
	case ACVTTSD2SL:
	case ACVTTSD2SQ:
	case ACVTTSS2SL:
	case ACVTTSS2SQ:
		if(copyas(&p->to, v)) {
			if(s != A)
				return copysub(&p->from, v, s, 1);
			if(copyau(&p->from, v))
				return 4;
			return 3;
		}
		goto caseread;

	case ARCLB:
	case ARCLL:
	case ARCLQ:
	case ARCLW:
	case ARCRB:
	case ARCRL:
	case ARCRQ:
	case ARCRW:
	case AROLB:
	case AROLL:
	case AROLQ:
	case AROLW:
	case ARORB:
	case ARORL:
	case ARORQ:
	case ARORW:
	case ASALB:
	case ASALL:
	case ASALQ:
	case ASALW:
	case ASARB:
//.........这里部分代码省略.........
开发者ID:aigamo，项目名称:isucon3egg，代码行数:101，代码来源:peep.c


示例13: copyu

/*
 * 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)
{
	ProgInfo info;

	switch(p->as) {
	case AJMP:
		if(s != A) {
			if(copysub(&p->to, v, s, 1))
				return 1;
			return 0;
		}
		if(copyau(&p->to, v))
			return 1;
		return 0;

	case ARET:
		if(s != A)
			return 1;
		return 3;

	case ACALL:
		if(REGEXT && v->type <= REGEXT && v->type > exregoffset)
			return 2;
		if(REGARG >= 0 && v->type == (uchar)REGARG)
			return 2;
		if(v->type == p->from.type)
			return 2;

		if(s != A) {
			if(copysub(&p->to, v, s, 1))
				return 1;
			return 0;
		}
		if(copyau(&p->to, v))
			return 4;
		return 3;

	case ATEXT:
		if(REGARG >= 0 && v->type == (uchar)REGARG)
			return 3;
		return 0;
	}

	proginfo(&info, p);

	if((info.reguse|info.regset) & RtoB(v->type))
		return 2;
		
	if(info.flags & LeftAddr)
		if(copyas(&p->from, v))
			return 2;

	if((info.flags & (RightRead|RightWrite)) == (RightRead|RightWrite))
		if(copyas(&p->to, v))
			return 2;
	
	if(info.flags & RightWrite) {
		if(copyas(&p->to, v)) {
			if(s != A)
				return copysub(&p->from, v, s, 1);
			if(copyau(&p->from, v))
				return 4;
			return 3;
		}
	}
	
	if(info.flags & (LeftAddr|LeftRead|LeftWrite|RightAddr|RightRead|RightWrite)) {
		if(s != A) {
			if(copysub(&p->from, v, s, 1))
				return 1;
			return copysub(&p->to, v, s, 1);
		}
		if(copyau(&p->from, v))
			return 1;
		if(copyau(&p->to, v))
			return 1;
	}

	return 0;
}
开发者ID:cloudaice，项目名称:golang，代码行数:89，代码来源:peep.c


示例14: copyu

/*
 * 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)
{

	switch(p->as) {

	default:
		if(debug['P'])
			print(" (???)");
		return 2;


	case ANOP:	/* read, write */
	case AMOVW:
	case AMOVH:
	case AMOVHU:
	case AMOVB:
	case AMOVBU:

	case AFMOVF:
	case AFMOVD:
	case AFMOVDW:
	case AFMOVWD:
	case AFMOVFW:
	case AFMOVWF:
	case AFMOVFD:
	case AFMOVDF:
		if(s != A) {
			if(copysub(&p->from, v, s, 1))
				return 1;
			if(!copyas(&p->to, v))
				if(copysub(&p->to, v, s, 1))
					return 1;
			return 0;
		}
		if(copyas(&p->to, v)) {
			if(copyau(&p->from, v))
				return 4;
			return 3;
		}
		if(copyau(&p->from, v))
			return 1;
		if(copyau(&p->to, v))
			return 1;
		return 0;

	case AADD:	/* read read write */
	case ASUB:
	case ASLL:
	case ASRL:
	case ASRA:
	case AOR:
	case AAND:
	case AXOR:
	case AMUL:
	case ADIV:
	case ADIVL:
	case AMOD:
	case AMODL:

	case AFADDF:
	case AFADDD:
	case AFSUBF:
	case AFSUBD:
	case AFMULF:
	case AFMULD:
	case AFDIVF:
	case AFDIVD:
		if(s != A) {
			if(copysub(&p->from, v, s, 1))
				return 1;
			if(copysub1(p, v, s, 1))
				return 1;
			if(!copyas(&p->to, v))
				if(copysub(&p->to, v, s, 1))
					return 1;
			return 0;
		}
		if(copyas(&p->to, v)) {
			if(p->reg == NREG)
				p->reg = p->to.reg;
			if(copyau(&p->from, v))
				return 4;
			if(copyau1(p, v))
				return 4;
			return 3;
		}
		if(copyau(&p->from, v))
			return 1;
		if(copyau1(p, v))
			return 1;
		if(copyau(&p->to, v))
//.........这里部分代码省略.........
开发者ID:99years，项目名称:plan9，代码行数:101，代码来源:peep.c


示例15: copyu

/*
 * 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)
{

	switch(p->as) {

	default:
		if(debug['P'])
			print(" (?)");
		return 2;

	case AMOVM:
		if(v->type != D_REG)
			return 0;
		if(p->from.type == D_CONST) {	/* read reglist, read/rar */
			if(s != A) {
				if(p->from.offset&(1<<v->reg))
					return 1;
				if(copysub(&p->to, v, s, 1))
					return 1;
				return 0;
			}
			if(copyau(&p->to, v)) {
				if(p->scond&C_WBIT)
					return 2;
				return 1;
			}
			if(p->from.offset&(1<<v->reg))
				return 1;
		} else {			/* read/rar, write reglist */
			if(s != A) {
				if(p->to.offset&(1<<v->reg))
					return 1;
				if(copysub(&p->from, v, s, 1))
					return 1;
				return 0;
			}
			if(copyau(&p->from, v)) {
				if(p->scond&C_WBIT)
					return 2;
				if(p->to.offset&(1<<v->reg))
					return 4;
				return 1;
			}
			if(p->to.offset&(1<<v->reg))
				return 3;
		}
		return 0;
		
	case ANOP:	/* read, write */
	case AMOVW:
	case AMOVF:
	case AMOVD:
	case AMOVH:
	case AMOVHU:
	case AMOVB:
	case AMOVBU:
	case AMOVDW:
	case AMOVWD:
	case AMOVFD:
	case AMOVDF:
		if(p->scond&(C_WBIT|C_PBIT))
		if(v->type == D_REG) {
			if(p->from.type == D_OREG || p->from.type == D_SHIFT) {
				if(p->from.reg == v->reg)
					return 2;
			} else {
		  		if(p->to.reg == v->reg)
				return 2;
			}
		}
		if(s != A) {
			if(copysub(&p->from, v, s, 1))
				return 1;
			if(!copyas(&p->to, v))
				if(copysub(&p->to, v, s, 1))
					return 1;
			return 0;
		}
		if(copyas(&p->to, v)) {
			if(copyau(&p->from, v))
				return 4;
			return 3;
		}
		if(copyau(&p->from, v))
			return 1;
		if(copyau(&p->to, v))
			return 1;
		return 0;


	case AADD:	/* read, read, write */
//.........这里部分代码省略.........
开发者ID:BGCX261，项目名称:znos-git，代码行数:101，代码来源:peep.c


示例16: copyu

/*
 * 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)
{

    switch(p->as) {

    default:
        if(debug['P'])
            print("unknown op %A\n", p->as);
        return 2;

    case ANEGB:
    case ANEGW:
    case ANEGL:
    case ANOTB:
    case ANOTW:
    case ANOTL:
        if(copyas(&p->to, v))
            return 2;
        break;

    case ALEAL:	/* lhs addr, rhs store */
        if(copyas(&p->from, v))
            return 2;


    case ANOP:	/* rhs store */
    case AMOVL:
    case AMOVBLSX:
    case AMOVBLZX:
    case AMOVWLSX:
    case AMOVWLZX:
        if(copyas(&p->to, v)) {
            if(s != A)
                return copysub(&p->from, v, s, 1);
            if(copyau(&p->from, v))
                return 4;
            return 3;
        }
        goto caseread;

    case AROLB:
    case AROLL:
    case AROLW:
    case ARORB:
    case ARORL:
    case ARORW:
    case ASALB:
    case ASALL:
    case ASALW:
    case ASARB:
    case ASARL:
    case ASARW:
    case ASHLB:
    case ASHLL:
    case ASHLW:
    case ASHRB:
    case ASHRL:
    case ASHRW:
        if(copyas(&p->to, v))
            return 2;
        if(copyas(&p->from, v))
            if(p->from.type == D_CX)
                return 2;
        goto caseread;

    case AADDB:	/* rhs rar */
    case AADDL:
    case AADDW:
    case AANDB:
    case AANDL:
    case AANDW:
    case ADECL:
    case ADECW:
    case AINCL:
    case AINCW:
    case ASUBB:
    case ASUBL:
    case ASUBW:
    case AORB:
    case AORL:
    case AORW:
    case AXORB:
    case AXORL:
    case AXORW:
    case AMOVB:
    case AMOVW:

    case AFMOVB:
    case AFMOVBP:
    case AFMOVD:
    case AFMOVDP:
//.........这里部分代码省略.........
开发者ID:gnanderson，项目名称:go，代码行数:101，代码来源:peep.c


示例17: copyu

/*
 * 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)
{

	switch(p->as) {

	default:
		if(debug['P'])
			print(" (?)");
		return 2;


	case ANOP:	/* read, write */
	case AMOVW:
	case AMOVF:
	case AMOVD:
	case AMOVH:
	case AMOVHU:
	case AMOVB:
	case AMOVBU:
	case AMOVDW:
	case AMOVWD:
	case AMOVFD:
	case AMOVDF:
		if(s != A) {
			if(copysub(&p->from, v, s, 1))
				return 1;
			if(!copyas(&p->to, v))
				if(copysub(&p->to, v, s, 1))
					return 1;
			return 0;
		}
		if(copyas(&p->to, v)) {
			if(copyau(&p->from, v))
				return 4;
			return 3;
		}
		if(copyau(&p->from, v))
			return 1;
		if(copyau(&p->to, v))
			return 1;
		return 0;

	case ASGT:	/* read, read, write */
	case ASGTU:

	case AADD:
	case AADDU:
	case ASUB:
	case ASUBU:
	case ASLL:
	case ASRL:
	case ASRA:
	case AOR:
	case ANOR:
	case AAND:
	case AXOR:
	case AMUL:
	case AMULU:
	case ADIV:
	case ADIVU:

	case AADDF:
	case AADDD:
	case ASUBF:
	case ASUBD:
	case AMULF:
	case AMULD:
	case ADIVF:
	case ADIVD:
		if(s != A) {
			if(copysub(&p->from, v, s, 1))
				return 1;
			if(copysub1(p, v, s, 1))
				return 1;
			if(!copyas(&p->to, v))
				if(copysub(&p->to, v, s, 1))
					return 1;
			return 0;
		}
		if(copyas(&p->to, v)) {
			if(p->reg == NREG)
				p->reg = p->to.reg;
			if(copyau(&p->from, v))
				return 4;
			if(copyau1(p, v))
				return 4;
			return 3;
		}
		if(copyau(&p->from, v))
			return 1;
		if(copyau1(p, v))
//.........这里部分代码省略.........
开发者ID:JamesLinus，项目名称:LiteBSD-Ports，代码行数:101，代码来源:peep.c



注：本文中的copyas函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

鲜花
握手
雷人
路过
鸡蛋
该文章已有0人参与评论

请发表评论

全部评论

专题导读
More+
上一篇：
C++ copyfile函数代码示例发布时间：2022-05-30
下一篇：
C++ copy_v3_v3函数代码示例发布时间：2022-05-30
热门推荐
More+
热门话题
More+
阅读排行榜

扫描微信二维码

查看手机版网站

随时了解更新最新资讯

139-2527-9053

在线客服（服务时间 9:00～18:00）

在线QQ客服
地址：深圳市南山区西丽大学城创智工业园
电邮：jeky_zhao#qq.com
移动电话：139-2527-9053

Powered by 互联科技 X3.4© 2001-2213 极客世界.|Sitemap