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constfold.c
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constfold.c
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// Compiler implementation of the D programming language
// Copyright (c) 1999-2011 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// http://www.digitalmars.com
// License for redistribution is by either the Artistic License
// in artistic.txt, or the GNU General Public License in gnu.txt.
// See the included readme.txt for details.
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <math.h>
#if __DMC__
#include <complex.h>
#endif
#include "rmem.h"
#include "root.h"
#include "port.h"
#include "mtype.h"
#include "expression.h"
#include "aggregate.h"
#include "declaration.h"
#include "utf.h"
#define LOG 0
int RealEquals(real_t x1, real_t x2);
Expression *expType(Type *type, Expression *e)
{
if (type != e->type)
{
e = e->copy();
e->type = type;
}
return e;
}
/* ================================== isConst() ============================== */
int Expression::isConst()
{
//printf("Expression::isConst(): %s\n", toChars());
return 0;
}
int IntegerExp::isConst()
{
return 1;
}
int RealExp::isConst()
{
return 1;
}
int ComplexExp::isConst()
{
return 1;
}
int NullExp::isConst()
{
return 0;
}
int SymOffExp::isConst()
{
return 2;
}
/* =============================== constFold() ============================== */
/* The constFold() functions were redundant with the optimize() ones,
* and so have been folded in with them.
*/
/* ========================================================================== */
Expression *Neg(Type *type, Expression *e1)
{ Expression *e;
Loc loc = e1->loc;
if (e1->type->isreal())
{
e = new RealExp(loc, -e1->toReal(), type);
}
else if (e1->type->isimaginary())
{
e = new RealExp(loc, -e1->toImaginary(), type);
}
else if (e1->type->iscomplex())
{
e = new ComplexExp(loc, -e1->toComplex(), type);
}
else
e = new IntegerExp(loc, -e1->toInteger(), type);
return e;
}
Expression *Com(Type *type, Expression *e1)
{ Expression *e;
Loc loc = e1->loc;
e = new IntegerExp(loc, ~e1->toInteger(), type);
return e;
}
Expression *Not(Type *type, Expression *e1)
{ Expression *e;
Loc loc = e1->loc;
e = new IntegerExp(loc, e1->isBool(0), type);
return e;
}
Expression *Bool(Type *type, Expression *e1)
{ Expression *e;
Loc loc = e1->loc;
e = new IntegerExp(loc, e1->isBool(1), type);
return e;
}
Expression *Add(Type *type, Expression *e1, Expression *e2)
{ Expression *e;
Loc loc = e1->loc;
#if LOG
printf("Add(e1 = %s, e2 = %s)\n", e1->toChars(), e2->toChars());
#endif
if (type->isreal())
{
e = new RealExp(loc, e1->toReal() + e2->toReal(), type);
}
else if (type->isimaginary())
{
e = new RealExp(loc, e1->toImaginary() + e2->toImaginary(), type);
}
else if (type->iscomplex())
{
// This rigamarole is necessary so that -0.0 doesn't get
// converted to +0.0 by doing an extraneous add with +0.0
complex_t c1;
real_t r1;
real_t i1;
complex_t c2;
real_t r2;
real_t i2;
complex_t v;
int x;
if (e1->type->isreal())
{ r1 = e1->toReal();
x = 0;
}
else if (e1->type->isimaginary())
{ i1 = e1->toImaginary();
x = 3;
}
else
{ c1 = e1->toComplex();
x = 6;
}
if (e2->type->isreal())
{ r2 = e2->toReal();
}
else if (e2->type->isimaginary())
{ i2 = e2->toImaginary();
x += 1;
}
else
{ c2 = e2->toComplex();
x += 2;
}
switch (x)
{
#if __DMC__
case 0+0: v = (complex_t) (r1 + r2); break;
case 0+1: v = r1 + i2 * I; break;
case 0+2: v = r1 + c2; break;
case 3+0: v = i1 * I + r2; break;
case 3+1: v = (complex_t) ((i1 + i2) * I); break;
case 3+2: v = i1 * I + c2; break;
case 6+0: v = c1 + r2; break;
case 6+1: v = c1 + i2 * I; break;
case 6+2: v = c1 + c2; break;
#else
case 0+0: v = complex_t(r1 + r2, 0); break;
case 0+1: v = complex_t(r1, i2); break;
case 0+2: v = complex_t(r1 + creall(c2), cimagl(c2)); break;
case 3+0: v = complex_t(r2, i1); break;
case 3+1: v = complex_t(0, i1 + i2); break;
case 3+2: v = complex_t(creall(c2), i1 + cimagl(c2)); break;
case 6+0: v = complex_t(creall(c1) + r2, cimagl(c2)); break;
case 6+1: v = complex_t(creall(c1), cimagl(c1) + i2); break;
case 6+2: v = c1 + c2; break;
#endif
default: assert(0);
}
e = new ComplexExp(loc, v, type);
}
else if (e1->op == TOKsymoff)
{
SymOffExp *soe = (SymOffExp *)e1;
e = new SymOffExp(loc, soe->var, soe->offset + e2->toInteger());
e->type = type;
}
else if (e2->op == TOKsymoff)
{
SymOffExp *soe = (SymOffExp *)e2;
e = new SymOffExp(loc, soe->var, soe->offset + e1->toInteger());
e->type = type;
}
else
e = new IntegerExp(loc, e1->toInteger() + e2->toInteger(), type);
return e;
}
Expression *Min(Type *type, Expression *e1, Expression *e2)
{ Expression *e;
Loc loc = e1->loc;
if (type->isreal())
{
e = new RealExp(loc, e1->toReal() - e2->toReal(), type);
}
else if (type->isimaginary())
{
e = new RealExp(loc, e1->toImaginary() - e2->toImaginary(), type);
}
else if (type->iscomplex())
{
// This rigamarole is necessary so that -0.0 doesn't get
// converted to +0.0 by doing an extraneous add with +0.0
complex_t c1;
real_t r1;
real_t i1;
complex_t c2;
real_t r2;
real_t i2;
complex_t v;
int x;
if (e1->type->isreal())
{ r1 = e1->toReal();
x = 0;
}
else if (e1->type->isimaginary())
{ i1 = e1->toImaginary();
x = 3;
}
else
{ c1 = e1->toComplex();
x = 6;
}
if (e2->type->isreal())
{ r2 = e2->toReal();
}
else if (e2->type->isimaginary())
{ i2 = e2->toImaginary();
x += 1;
}
else
{ c2 = e2->toComplex();
x += 2;
}
switch (x)
{
#if __DMC__
case 0+0: v = (complex_t) (r1 - r2); break;
case 0+1: v = r1 - i2 * I; break;
case 0+2: v = r1 - c2; break;
case 3+0: v = i1 * I - r2; break;
case 3+1: v = (complex_t) ((i1 - i2) * I); break;
case 3+2: v = i1 * I - c2; break;
case 6+0: v = c1 - r2; break;
case 6+1: v = c1 - i2 * I; break;
case 6+2: v = c1 - c2; break;
#else
case 0+0: v = complex_t(r1 - r2, 0); break;
case 0+1: v = complex_t(r1, -i2); break;
case 0+2: v = complex_t(r1 - creall(c2), -cimagl(c2)); break;
case 3+0: v = complex_t(-r2, i1); break;
case 3+1: v = complex_t(0, i1 - i2); break;
case 3+2: v = complex_t(-creall(c2), i1 - cimagl(c2)); break;
case 6+0: v = complex_t(creall(c1) - r2, cimagl(c1)); break;
case 6+1: v = complex_t(creall(c1), cimagl(c1) - i2); break;
case 6+2: v = c1 - c2; break;
#endif
default: assert(0);
}
e = new ComplexExp(loc, v, type);
}
else if (e1->op == TOKsymoff)
{
SymOffExp *soe = (SymOffExp *)e1;
e = new SymOffExp(loc, soe->var, soe->offset - e2->toInteger());
e->type = type;
}
else
{
e = new IntegerExp(loc, e1->toInteger() - e2->toInteger(), type);
}
return e;
}
Expression *Mul(Type *type, Expression *e1, Expression *e2)
{ Expression *e;
Loc loc = e1->loc;
if (type->isfloating())
{ complex_t c;
#ifdef IN_GCC
real_t r;
#else
d_float80 r;
#endif
if (e1->type->isreal())
{
#if __DMC__
c = e1->toReal() * e2->toComplex();
#else
r = e1->toReal();
c = e2->toComplex();
c = complex_t(r * creall(c), r * cimagl(c));
#endif
}
else if (e1->type->isimaginary())
{
#if __DMC__
c = e1->toImaginary() * I * e2->toComplex();
#else
r = e1->toImaginary();
c = e2->toComplex();
c = complex_t(-r * cimagl(c), r * creall(c));
#endif
}
else if (e2->type->isreal())
{
#if __DMC__
c = e2->toReal() * e1->toComplex();
#else
r = e2->toReal();
c = e1->toComplex();
c = complex_t(r * creall(c), r * cimagl(c));
#endif
}
else if (e2->type->isimaginary())
{
#if __DMC__
c = e1->toComplex() * e2->toImaginary() * I;
#else
r = e2->toImaginary();
c = e1->toComplex();
c = complex_t(-r * cimagl(c), r * creall(c));
#endif
}
else
c = e1->toComplex() * e2->toComplex();
if (type->isreal())
e = new RealExp(loc, creall(c), type);
else if (type->isimaginary())
e = new RealExp(loc, cimagl(c), type);
else if (type->iscomplex())
e = new ComplexExp(loc, c, type);
else
assert(0);
}
else
{
e = new IntegerExp(loc, e1->toInteger() * e2->toInteger(), type);
}
return e;
}
Expression *Div(Type *type, Expression *e1, Expression *e2)
{ Expression *e;
Loc loc = e1->loc;
if (type->isfloating())
{ complex_t c;
#ifdef IN_GCC
real_t r;
#else
d_float80 r;
#endif
//e1->type->print();
//e2->type->print();
if (e2->type->isreal())
{
if (e1->type->isreal())
{
e = new RealExp(loc, e1->toReal() / e2->toReal(), type);
return e;
}
#if __DMC__
//r = e2->toReal();
//c = e1->toComplex();
//printf("(%Lg + %Lgi) / %Lg\n", creall(c), cimagl(c), r);
c = e1->toComplex() / e2->toReal();
#else
r = e2->toReal();
c = e1->toComplex();
c = complex_t(creall(c) / r, cimagl(c) / r);
#endif
}
else if (e2->type->isimaginary())
{
#if __DMC__
//r = e2->toImaginary();
//c = e1->toComplex();
//printf("(%Lg + %Lgi) / %Lgi\n", creall(c), cimagl(c), r);
c = e1->toComplex() / (e2->toImaginary() * I);
#else
r = e2->toImaginary();
c = e1->toComplex();
c = complex_t(cimagl(c) / r, -creall(c) / r);
#endif
}
else
{
c = e1->toComplex() / e2->toComplex();
}
if (type->isreal())
e = new RealExp(loc, creall(c), type);
else if (type->isimaginary())
e = new RealExp(loc, cimagl(c), type);
else if (type->iscomplex())
e = new ComplexExp(loc, c, type);
else
assert(0);
}
else
{ sinteger_t n1;
sinteger_t n2;
sinteger_t n;
n1 = e1->toInteger();
n2 = e2->toInteger();
if (n2 == 0)
{ e2->error("divide by 0");
e2 = new IntegerExp(loc, 1, e2->type);
n2 = 1;
}
if (e1->type->isunsigned() || e2->type->isunsigned())
n = ((d_uns64) n1) / ((d_uns64) n2);
else
n = n1 / n2;
e = new IntegerExp(loc, n, type);
}
return e;
}
Expression *Mod(Type *type, Expression *e1, Expression *e2)
{ Expression *e;
Loc loc = e1->loc;
if (type->isfloating())
{
complex_t c;
if (e2->type->isreal())
{ real_t r2 = e2->toReal();
#ifdef __DMC__
c = Port::fmodl(e1->toReal(), r2) + Port::fmodl(e1->toImaginary(), r2) * I;
#elif defined(IN_GCC)
c = complex_t(e1->toReal() % r2, e1->toImaginary() % r2);
#else
c = complex_t(Port::fmodl(e1->toReal(), r2), Port::fmodl(e1->toImaginary(), r2));
#endif
}
else if (e2->type->isimaginary())
{ real_t i2 = e2->toImaginary();
#ifdef __DMC__
c = Port::fmodl(e1->toReal(), i2) + Port::fmodl(e1->toImaginary(), i2) * I;
#elif defined(IN_GCC)
c = complex_t(e1->toReal() % i2, e1->toImaginary() % i2);
#else
c = complex_t(Port::fmodl(e1->toReal(), i2), Port::fmodl(e1->toImaginary(), i2));
#endif
}
else
assert(0);
if (type->isreal())
e = new RealExp(loc, creall(c), type);
else if (type->isimaginary())
e = new RealExp(loc, cimagl(c), type);
else if (type->iscomplex())
e = new ComplexExp(loc, c, type);
else
assert(0);
}
else
{ sinteger_t n1;
sinteger_t n2;
sinteger_t n;
n1 = e1->toInteger();
n2 = e2->toInteger();
if (n2 == 0)
{ e2->error("divide by 0");
e2 = new IntegerExp(loc, 1, e2->type);
n2 = 1;
}
if (n2 == -1 && !type->isunsigned())
{ // Check for int.min % -1
if (n1 == 0xFFFFFFFF80000000ULL && type->toBasetype()->ty != Tint64)
{
e2->error("integer overflow: int.min % -1");
e2 = new IntegerExp(loc, 1, e2->type);
n2 = 1;
}
else if (n1 == 0x8000000000000000LL) // long.min % -1
{
e2->error("integer overflow: long.min % -1");
e2 = new IntegerExp(loc, 1, e2->type);
n2 = 1;
}
}
if (e1->type->isunsigned() || e2->type->isunsigned())
n = ((d_uns64) n1) % ((d_uns64) n2);
else
n = n1 % n2;
e = new IntegerExp(loc, n, type);
}
return e;
}
Expression *Pow(Type *type, Expression *e1, Expression *e2)
{ Expression *e;
Loc loc = e1->loc;
// Handle integer power operations.
if (e2->type->isintegral())
{
Expression * r;
Expression * v;
dinteger_t n = e2->toInteger();
bool neg;
if (!e2->type->isunsigned() && (sinteger_t)n < 0)
{
if (e1->type->isintegral())
return EXP_CANT_INTERPRET;
// Don't worry about overflow, from now on n is unsigned.
neg = true;
n = -n;
}
else
neg = false;
if (e1->type->isfloating())
{
r = new RealExp(loc, e1->toReal(), e1->type);
v = new RealExp(loc, 1.0, e1->type);
}
else
{
r = new RealExp(loc, e1->toReal(), Type::tfloat64);
v = new RealExp(loc, 1.0, Type::tfloat64);
}
while (n != 0)
{
if (n & 1)
v = Mul(v->type, v, r);
n >>= 1;
r = Mul(r->type, r, r);
}
if (neg)
v = Div(v->type, new RealExp(loc, 1.0, v->type), v);
if (type->isintegral())
e = new IntegerExp(loc, v->toInteger(), type);
else
e = new RealExp(loc, v->toReal(), type);
}
else if (e2->type->isfloating())
{
// x ^^ y for x < 0 and y not an integer is not defined
if (e1->toReal() < 0.0)
{
e = new RealExp(loc, Port::nan, type);
}
else if (e2->toReal() == 0.5)
{
// Special case: call sqrt directly.
Expressions args;
args.setDim(1);
args.tdata()[0] = e1;
e = eval_builtin(loc, BUILTINsqrt, &args);
if (!e)
e = EXP_CANT_INTERPRET;
}
else
e = EXP_CANT_INTERPRET;
}
else
e = EXP_CANT_INTERPRET;
return e;
}
Expression *Shl(Type *type, Expression *e1, Expression *e2)
{ Expression *e;
Loc loc = e1->loc;
e = new IntegerExp(loc, e1->toInteger() << e2->toInteger(), type);
return e;
}
Expression *Shr(Type *type, Expression *e1, Expression *e2)
{
Loc loc = e1->loc;
dinteger_t value = e1->toInteger();
dinteger_t dcount = e2->toInteger();
assert(dcount <= 0xFFFFFFFF);
unsigned count = (unsigned)dcount;
switch (e1->type->toBasetype()->ty)
{
case Tint8:
value = (d_int8)(value) >> count;
break;
case Tuns8:
case Tchar:
value = (d_uns8)(value) >> count;
break;
case Tint16:
value = (d_int16)(value) >> count;
break;
case Tuns16:
case Twchar:
value = (d_uns16)(value) >> count;
break;
case Tint32:
value = (d_int32)(value) >> count;
break;
case Tuns32:
case Tdchar:
value = (d_uns32)(value) >> count;
break;
case Tint64:
value = (d_int64)(value) >> count;
break;
case Tuns64:
value = (d_uns64)(value) >> count;
break;
case Terror:
return e1;
default:
assert(0);
}
Expression *e = new IntegerExp(loc, value, type);
return e;
}
Expression *Ushr(Type *type, Expression *e1, Expression *e2)
{
Loc loc = e1->loc;
dinteger_t value = e1->toInteger();
dinteger_t dcount = e2->toInteger();
assert(dcount <= 0xFFFFFFFF);
unsigned count = (unsigned)dcount;
switch (e1->type->toBasetype()->ty)
{
case Tint8:
case Tuns8:
case Tchar:
// Possible only with >>>=. >>> always gets promoted to int.
value = (value & 0xFF) >> count;
break;
case Tint16:
case Tuns16:
case Twchar:
// Possible only with >>>=. >>> always gets promoted to int.
value = (value & 0xFFFF) >> count;
break;
case Tint32:
case Tuns32:
case Tdchar:
value = (value & 0xFFFFFFFF) >> count;
break;
case Tint64:
case Tuns64:
value = (d_uns64)(value) >> count;
break;
case Terror:
return e1;
default:
assert(0);
}
Expression *e = new IntegerExp(loc, value, type);
return e;
}
Expression *And(Type *type, Expression *e1, Expression *e2)
{
Expression *e;
e = new IntegerExp(e1->loc, e1->toInteger() & e2->toInteger(), type);
return e;
}
Expression *Or(Type *type, Expression *e1, Expression *e2)
{ Expression *e;
e = new IntegerExp(e1->loc, e1->toInteger() | e2->toInteger(), type);
return e;
}
Expression *Xor(Type *type, Expression *e1, Expression *e2)
{ Expression *e;
e = new IntegerExp(e1->loc, e1->toInteger() ^ e2->toInteger(), type);
return e;
}
/* Also returns EXP_CANT_INTERPRET if cannot be computed.
*/
Expression *Equal(enum TOK op, Type *type, Expression *e1, Expression *e2)
{ Expression *e;
Loc loc = e1->loc;
int cmp;
real_t r1;
real_t r2;
//printf("Equal(e1 = %s, e2 = %s)\n", e1->toChars(), e2->toChars());
assert(op == TOKequal || op == TOKnotequal);
if (e1->op == TOKnull)
{
if (e2->op == TOKnull)
cmp = 1;
else if (e2->op == TOKstring)
{ StringExp *es2 = (StringExp *)e2;
cmp = (0 == es2->len);
}
else if (e2->op == TOKarrayliteral)
{ ArrayLiteralExp *es2 = (ArrayLiteralExp *)e2;
cmp = !es2->elements || (0 == es2->elements->dim);
}
else
return EXP_CANT_INTERPRET;
}
else if (e2->op == TOKnull)
{
if (e1->op == TOKstring)
{ StringExp *es1 = (StringExp *)e1;
cmp = (0 == es1->len);
}
else if (e1->op == TOKarrayliteral)
{ ArrayLiteralExp *es1 = (ArrayLiteralExp *)e1;
cmp = !es1->elements || (0 == es1->elements->dim);
}
else
return EXP_CANT_INTERPRET;
}
else if (e1->op == TOKstring && e2->op == TOKstring)
{ StringExp *es1 = (StringExp *)e1;
StringExp *es2 = (StringExp *)e2;
if (es1->sz != es2->sz)
{
assert(global.errors);
return EXP_CANT_INTERPRET;
}
if (es1->len == es2->len &&
memcmp(es1->string, es2->string, es1->sz * es1->len) == 0)
cmp = 1;
else
cmp = 0;
}
else if (e1->op == TOKarrayliteral && e2->op == TOKarrayliteral)
{ ArrayLiteralExp *es1 = (ArrayLiteralExp *)e1;
ArrayLiteralExp *es2 = (ArrayLiteralExp *)e2;
if ((!es1->elements || !es1->elements->dim) &&
(!es2->elements || !es2->elements->dim))
cmp = 1; // both arrays are empty
else if (!es1->elements || !es2->elements)
cmp = 0;
else if (es1->elements->dim != es2->elements->dim)
cmp = 0;
else
{
for (size_t i = 0; i < es1->elements->dim; i++)
{ Expression *ee1 = (*es1->elements)[i];
Expression *ee2 = (*es2->elements)[i];
Expression *v = Equal(TOKequal, Type::tint32, ee1, ee2);
if (v == EXP_CANT_INTERPRET)
return EXP_CANT_INTERPRET;
cmp = v->toInteger();
if (cmp == 0)
break;
}
}
}
else if (e1->op == TOKarrayliteral && e2->op == TOKstring)
{ // Swap operands and use common code
Expression *etmp = e1;
e1 = e2;
e2 = etmp;
goto Lsa;
}
else if (e1->op == TOKstring && e2->op == TOKarrayliteral)
{
Lsa:
StringExp *es1 = (StringExp *)e1;
ArrayLiteralExp *es2 = (ArrayLiteralExp *)e2;
size_t dim1 = es1->len;
size_t dim2 = es2->elements ? es2->elements->dim : 0;
if (dim1 != dim2)
cmp = 0;
else
{
cmp = 1; // if dim1 winds up being 0
for (size_t i = 0; i < dim1; i++)
{
uinteger_t c = es1->charAt(i);
Expression *ee2 = (*es2->elements)[i];
if (ee2->isConst() != 1)
return EXP_CANT_INTERPRET;
cmp = (c == ee2->toInteger());
if (cmp == 0)
break;
}
}
}
else if (e1->op == TOKstructliteral && e2->op == TOKstructliteral)
{ StructLiteralExp *es1 = (StructLiteralExp *)e1;
StructLiteralExp *es2 = (StructLiteralExp *)e2;
if (es1->sd != es2->sd)
cmp = 0;
else if ((!es1->elements || !es1->elements->dim) &&
(!es2->elements || !es2->elements->dim))
cmp = 1; // both arrays are empty
else if (!es1->elements || !es2->elements)
cmp = 0;
else if (es1->elements->dim != es2->elements->dim)
cmp = 0;
else
{
cmp = 1;
for (size_t i = 0; i < es1->elements->dim; i++)
{ Expression *ee1 = (*es1->elements)[i];
Expression *ee2 = (*es2->elements)[i];
if (ee1 == ee2)
continue;
if (!ee1 || !ee2)
{ cmp = 0;
break;
}
Expression *v = Equal(TOKequal, Type::tint32, ee1, ee2);
if (v == EXP_CANT_INTERPRET)
return EXP_CANT_INTERPRET;
cmp = v->toInteger();
if (cmp == 0)
break;
}
}
}
#if 0 // Should handle this
else if (e1->op == TOKarrayliteral && e2->op == TOKstring)
{
}
#endif
else if (e1->isConst() != 1 || e2->isConst() != 1)
return EXP_CANT_INTERPRET;
else if (e1->type->isreal())
{
r1 = e1->toReal();
r2 = e2->toReal();
goto L1;
}
else if (e1->type->isimaginary())
{
r1 = e1->toImaginary();
r2 = e2->toImaginary();
L1:
#if __DMC__
cmp = (r1 == r2);
#else
if (Port::isNan(r1) || Port::isNan(r2)) // if unordered
{
cmp = 0;
}
else
{
cmp = (r1 == r2);
}
#endif
}
else if (e1->type->iscomplex())
{
cmp = e1->toComplex() == e2->toComplex();
}
else if (e1->type->isintegral() || e1->type->toBasetype()->ty == Tpointer)
{
cmp = (e1->toInteger() == e2->toInteger());
}
else
return EXP_CANT_INTERPRET;
if (op == TOKnotequal)
cmp ^= 1;
e = new IntegerExp(loc, cmp, type);
return e;
}
Expression *Identity(enum TOK op, Type *type, Expression *e1, Expression *e2)
{
Loc loc = e1->loc;
int cmp;
if (e1->op == TOKnull)
{
cmp = (e2->op == TOKnull);
}
else if (e2->op == TOKnull)
{
cmp = 0;
}
else if (e1->op == TOKsymoff && e2->op == TOKsymoff)
{
SymOffExp *es1 = (SymOffExp *)e1;
SymOffExp *es2 = (SymOffExp *)e2;
cmp = (es1->var == es2->var && es1->offset == es2->offset);
}
else
{
if (e1->type->isreal())
{
cmp = RealEquals(e1->toReal(), e2->toReal());
}
else if (e1->type->isimaginary())
{
cmp = RealEquals(e1->toImaginary(), e2->toImaginary());
}
else if (e1->type->iscomplex())
{
complex_t v1 = e1->toComplex();
complex_t v2 = e2->toComplex();
cmp = RealEquals(creall(v1), creall(v2)) &&
RealEquals(cimagl(v1), cimagl(v1));
}
else
return Equal((op == TOKidentity) ? TOKequal : TOKnotequal,
type, e1, e2);
}
if (op == TOKnotidentity)
cmp ^= 1;
return new IntegerExp(loc, cmp, type);
}
Expression *Cmp(enum TOK op, Type *type, Expression *e1, Expression *e2)
{ Expression *e;