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Avoid emitting an extra copy on each 32-bit operation 

llvm-svn: 12743
This commit is contained in:
Chris Lattner 2004-04-07 04:36:53 +00:00
parent 4aac81435f
commit f6245bc8e9
1 changed files with 11 additions and 4 deletions
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15
llvm/lib/Target/SparcV8/InstSelectSimple.cpp
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@ -161,6 +161,12 @@ static TypeClass getClass (const Type *T) {
return cByte;
}
}
static TypeClass getClassB(const Type *T) {
if (T == Type::BoolTy) return cByte;
return getClass(T);
}
/// copyConstantToRegister - Output the instructions required to put the
/// specified constant into the specified register.
@ -280,9 +286,8 @@ void V8ISel::visitReturnInst(ReturnInst &I) {
visitInstruction (I);
return;
}
} else if (I.getNumOperands () != 1) {
visitInstruction (I);
}
// Just emit a 'retl' instruction to return.
BuildMI(BB, V8::RETL, 0);
return;
@ -293,7 +298,9 @@ void V8ISel::visitBinaryOperator (Instruction &I) {
unsigned Op0Reg = getReg (I.getOperand (0));
unsigned Op1Reg = getReg (I.getOperand (1));
unsigned ResultReg = makeAnotherReg (I.getType ());
unsigned ResultReg = DestReg;
if (getClassB(I.getType()) != cInt)
ResultReg = makeAnotherReg (I.getType ());
unsigned OpCase = ~0;
// FIXME: support long, ulong, fp.
@ -368,7 +375,7 @@ void V8ISel::visitBinaryOperator (Instruction &I) {
}
break;
case cInt:
BuildMI (BB, V8::ORrr, 2, DestReg).addReg (V8::G0).addReg (ResultReg);
// Nothing todo here.
break;
default:
visitInstruction (I);