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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
View File

@ -66,7 +66,9 @@ static GenericValue executeShlInst(GenericValue Src1, GenericValue Src2,
const Type *Ty); const Type *Ty);
static GenericValue executeShrInst(GenericValue Src1, GenericValue Src2, static GenericValue executeShrInst(GenericValue Src1, GenericValue Src2,
const Type *Ty); const Type *Ty);
static GenericValue executeSelectInst(GenericValue Src1, GenericValue Src2,
GenericValue Src3);
GenericValue Interpreter::getConstantExprValue (ConstantExpr *CE, GenericValue Interpreter::getConstantExprValue (ConstantExpr *CE,
ExecutionContext &SF) { ExecutionContext &SF) {
switch (CE->getOpcode()) { switch (CE->getOpcode()) {
@ -139,7 +141,10 @@ GenericValue Interpreter::getConstantExprValue (ConstantExpr *CE,
return executeShrInst(getOperandValue(CE->getOperand(0), SF), return executeShrInst(getOperandValue(CE->getOperand(0), SF),
getOperandValue(CE->getOperand(1), SF), getOperandValue(CE->getOperand(1), SF),
CE->getOperand(0)->getType()); 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: default:
std::cerr << "Unhandled ConstantExpr: " << CE << "\n"; std::cerr << "Unhandled ConstantExpr: " << CE << "\n";
abort(); abort();
@ -518,6 +523,21 @@ void Interpreter::visitBinaryOperator(BinaryOperator &I) {
SetValue(&I, R, SF); 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 // Terminator Instruction Implementations
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//

2
lib/ExecutionEngine/Interpreter/Interpreter.h
View File

@ -137,6 +137,8 @@ public:
void visitGetElementPtrInst(GetElementPtrInst &I); void visitGetElementPtrInst(GetElementPtrInst &I);
void visitPHINode(PHINode &PN) { assert(0 && "PHI nodes already handled!"); } void visitPHINode(PHINode &PN) { assert(0 && "PHI nodes already handled!"); }
void visitCastInst(CastInst &I); void visitCastInst(CastInst &I);
void visitSelectInst(SelectInst &I);
void visitCallSite(CallSite CS); void visitCallSite(CallSite CS);
void visitCallInst(CallInst &I) { visitCallSite (CallSite (&I)); } void visitCallInst(CallInst &I) { visitCallSite (CallSite (&I)); }