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Add support for the select instruction

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13076 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-04-20 16:43:21 +00:00
parent 0eb61037f7
commit 759d34ffb7
2 changed files with 24 additions and 2 deletions
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24
lib/ExecutionEngine/Interpreter/Execution.cpp
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@ -66,7 +66,9 @@ static GenericValue executeShlInst(GenericValue Src1, GenericValue Src2,
const Type *Ty);
static GenericValue executeShrInst(GenericValue Src1, GenericValue Src2,
const Type *Ty);
static GenericValue executeSelectInst(GenericValue Src1, GenericValue Src2,
GenericValue Src3);
GenericValue Interpreter::getConstantExprValue (ConstantExpr *CE,
ExecutionContext &SF) {
switch (CE->getOpcode()) {
@ -139,7 +141,10 @@ GenericValue Interpreter::getConstantExprValue (ConstantExpr *CE,
return executeShrInst(getOperandValue(CE->getOperand(0), SF),
getOperandValue(CE->getOperand(1), SF),
CE->getOperand(0)->getType());
case Instruction::Select:
return executeSelectInst(getOperandValue(CE->getOperand(0), SF),
getOperandValue(CE->getOperand(1), SF),
getOperandValue(CE->getOperand(2), SF));
default:
std::cerr << "Unhandled ConstantExpr: " << CE << "\n";
abort();
@ -518,6 +523,21 @@ void Interpreter::visitBinaryOperator(BinaryOperator &I) {
SetValue(&I, R, SF);
}
static GenericValue executeSelectInst(GenericValue Src1, GenericValue Src2,
GenericValue Src3) {
return Src1.BoolVal ? Src2 : Src3;
}
void Interpreter::visitSelectInst(SelectInst &I) {
ExecutionContext &SF = ECStack.back();
GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
GenericValue Src3 = getOperandValue(I.getOperand(2), SF);
GenericValue R = executeSelectInst(Src1, Src2, Src3);
SetValue(&I, R, SF);
}
//===----------------------------------------------------------------------===//
// Terminator Instruction Implementations
//===----------------------------------------------------------------------===//