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Add support for cast ... to bool in visitCastInst (it's a start, anyways...)

llvm-svn: 4883
This commit is contained in:
Brian Gaeke 2002-12-03 07:36:03 +00:00
parent 8052f8006b
commit b676857358
1 changed files with 14 additions and 3 deletions
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17
llvm/lib/Target/X86/InstSelectSimple.cpp
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@ -641,9 +641,20 @@ ISel::visitCastInst (CastInst &CI)
//the former is that the register allocator could use any register it wants,
//but for now this obviously doesn't matter. :)
// if target type is bool
// Emit Compare
// Emit Set-if-not-zero
Type *targetType = CI.getType ();
Value *operand = CI.getOperand (0);
unsigned int operandReg = getReg (operand);
Type *sourceType = operand->getType ();
unsigned int destReg = getReg (CI);
// cast to bool:
if (targetType == Type::BoolTy) {
// Emit Compare
BuildMI (BB, X86::CMPri8, 2).addReg (operandReg).addZImm (0);
// Emit Set-if-not-zero
BuildMI (BB, X86::SETNEr, 1, destReg);
return;
}
// if size of target type == size of source type
// Emit Mov reg(target) <- reg(source)