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Added const equality checking for string literals

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This commit is contained in:
Brian Fiete 2020-02-28 14:46:12 -08:00
parent 5bed292e87
commit a43d4e8bd9
3 changed files with 60 additions and 1 deletions
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35
IDEHelper/Compiler/BfExprEvaluator.cpp
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@ -17660,6 +17660,41 @@ void BfExprEvaluator::PerformBinaryOperation(BfAstNode* leftExpression, BfAstNod
}
}
// Check for constant equality checks (mostly for strings)
if ((binaryOp == BfBinaryOp_Equality) || (binaryOp == BfBinaryOp_InEquality))
{
auto leftConstant = mModule->mBfIRBuilder->GetConstant(leftValue.mValue);
auto rightConstant = mModule->mBfIRBuilder->GetConstant(rightValue.mValue);
if ((leftConstant != NULL) && (rightConstant != NULL))
{
auto boolType = mModule->GetPrimitiveType(BfTypeCode_Boolean);
int leftStringPoolIdx = mModule->GetStringPoolIdx(leftValue.mValue, mModule->mBfIRBuilder);
if (leftStringPoolIdx != -1)
{
int rightStringPoolIdx = mModule->GetStringPoolIdx(rightValue.mValue, mModule->mBfIRBuilder);
if (rightStringPoolIdx != -1)
{
bool isEqual = leftStringPoolIdx == rightStringPoolIdx;
if (binaryOp == BfBinaryOp_InEquality)
isEqual = !isEqual;
mResult = BfTypedValue(mModule->GetConstValue(isEqual ? 1 : 0, boolType), boolType);
return;
}
}
int eqResult = mModule->mBfIRBuilder->CheckConstEquality(leftValue.mValue, rightValue.mValue);
if (eqResult != -1)
{
bool isEqual = eqResult == 1;
if (binaryOp == BfBinaryOp_InEquality)
isEqual = !isEqual;
mResult = BfTypedValue(mModule->GetConstValue(isEqual ? 1 : 0, boolType), boolType);
return;
}
}
}
if ((leftValue.mType->IsTypeInstance()) || (leftValue.mType->IsGenericParam()) ||
(rightValue.mType->IsTypeInstance()) || (rightValue.mType->IsGenericParam()))
{