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Expansion to const equality checks

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This commit is contained in:
Brian Fiete 2020-02-29 07:35:17 -08:00
parent a43d4e8bd9
commit 6512841cf1
3 changed files with 61 additions and 3 deletions
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62
IDEHelper/Compiler/BfIRBuilder.cpp
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@ -344,6 +344,35 @@ bool BfIRConstHolder::TryGetBool(BfIRValue id, bool& boolVal)
return false;
}
int BfIRConstHolder::IsZero(BfIRValue value)
{
auto constant = GetConstant(value);
if (constant == NULL)
return -1;
if ((constant->mTypeCode >= BfTypeCode_Boolean) && (constant->mTypeCode <= BfTypeCode_Double))
{
return (constant->mUInt64 == 0) ? 1 : 0;
}
if (constant->mConstType == BfConstType_AggZero)
return 1;
if (constant->mConstType == BfConstType_Array)
{
auto constArr = (BfConstantArray*)constant;
for (int i = 0; i < constArr->mValues.mSize; i++)
{
int elemResult = IsZero(constArr->mValues[i]);
if (elemResult != 1)
return elemResult;
}
return 1;
}
return -1;
}
int BfIRConstHolder::CheckConstEquality(BfIRValue lhs, BfIRValue rhs)
{
auto constLHS = GetConstant(lhs);
@ -358,10 +387,37 @@ int BfIRConstHolder::CheckConstEquality(BfIRValue lhs, BfIRValue rhs)
if (constRHS->mConstType == BfConstType_BitCast)
return CheckConstEquality(lhs, BfIRValue(BfIRValueFlags_Const, ((BfConstantBitCast*)constRHS)->mTarget));
if ((constLHS->mConstType == BfConstType_GlobalVar) &&
(constRHS->mConstType == BfConstType_GlobalVar))
int lhsZero = IsZero(lhs);
if (lhsZero != -1)
{
return (constLHS == constRHS) ? 1 : 0;
int rhsZero = IsZero(rhs);
if (rhsZero != -1)
return (lhsZero == rhsZero) ? 1 : 0;
}
if (constLHS->mTypeCode != constRHS->mTypeCode)
return -1;
if ((constLHS->mTypeCode >= BfTypeCode_Boolean) && (constLHS->mTypeCode <= BfTypeCode_Double))
{
return (constLHS->mUInt64 == constRHS->mUInt16) ? 1 : 0;
}
if (constLHS->mConstType == BfConstType_Array)
{
auto arrayLHS = (BfConstantArray*)constLHS;
auto arrayRHS = (BfConstantArray*)constRHS;
if (arrayLHS->mValues.mSize != arrayRHS->mValues.mSize)
return -1;
for (int i = 0; i < arrayLHS->mValues.mSize; i++)
{
int elemResult = CheckConstEquality(arrayLHS->mValues[i], arrayRHS->mValues[i]);
if (elemResult != 1)
return elemResult;
}
return 1;
}
return -1;