BuildMI(*MBB, IPt, X86::MOV32ri, 1, Reg).addGlobalAddress(GV);
return Reg;
} else if (CastInst *CI = dyn_cast<CastInst>(V)) {
- // Do not emit noop casts at all.
- if (getClassB(CI->getType()) == getClassB(CI->getOperand(0)->getType()))
+ // Do not emit noop casts at all, unless it's a double -> float cast.
+ if (getClassB(CI->getType()) == getClassB(CI->getOperand(0)->getType()) &&
+ (CI->getType() != Type::FloatTy ||
+ CI->getOperand(0)->getType() != Type::DoubleTy))
return getReg(CI->getOperand(0), MBB, IPt);
} else if (AllocaInst *AI = dyn_castFixedAlloca(V)) {
// If the alloca address couldn't be folded into the instruction addressing,
unsigned DestClass = getClassB(CI.getType());
// Noop casts are not emitted: getReg will return the source operand as the
// register to use for any uses of the noop cast.
- if (DestClass == SrcClass)
- return;
+ if (DestClass == SrcClass) {
+ // The only detail in this plan is that casts from double -> float are
+ // truncating operations that we have to codegen through memory (despite
+ // the fact that the source/dest registers are the same class).
+ if (CI.getType() != Type::FloatTy || Op->getType() != Type::DoubleTy)
+ return;
+ }
// If this is a cast from a 32-bit integer to a Long type, and the only uses
// of the case are GEP instructions, then the cast does not need to be
BuildMI(*MBB, IPt, X86::MOV32ri, 1, Reg).addGlobalAddress(GV);
return Reg;
} else if (CastInst *CI = dyn_cast<CastInst>(V)) {
- // Do not emit noop casts at all.
- if (getClassB(CI->getType()) == getClassB(CI->getOperand(0)->getType()))
+ // Do not emit noop casts at all, unless it's a double -> float cast.
+ if (getClassB(CI->getType()) == getClassB(CI->getOperand(0)->getType()) &&
+ (CI->getType() != Type::FloatTy ||
+ CI->getOperand(0)->getType() != Type::DoubleTy))
return getReg(CI->getOperand(0), MBB, IPt);
} else if (AllocaInst *AI = dyn_castFixedAlloca(V)) {
// If the alloca address couldn't be folded into the instruction addressing,
unsigned DestClass = getClassB(CI.getType());
// Noop casts are not emitted: getReg will return the source operand as the
// register to use for any uses of the noop cast.
- if (DestClass == SrcClass)
- return;
+ if (DestClass == SrcClass) {
+ // The only detail in this plan is that casts from double -> float are
+ // truncating operations that we have to codegen through memory (despite
+ // the fact that the source/dest registers are the same class).
+ if (CI.getType() != Type::FloatTy || Op->getType() != Type::DoubleTy)
+ return;
+ }
// If this is a cast from a 32-bit integer to a Long type, and the only uses
// of the case are GEP instructions, then the cast does not need to be