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Fix const array access folding

This commit is contained in:
drmortalwombat 2024-04-12 16:11:47 +02:00
parent 5971f9a80f
commit 55ddce2211
5 changed files with 46 additions and 49 deletions
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82
oscar64/Declaration.cpp
View File

@ -452,6 +452,44 @@ Expression* Expression::LogicInvertExpression(void)
}
}
Expression* Expression::ConstantDereference(void)
{
if (mType == EX_VARIABLE)
{
if (mDecValue->mType == DT_VARIABLE && (mDecValue->mFlags & DTF_CONST) && mDecValue->mValue)
return mDecValue->mValue;
else if (mDecValue->mType == DT_VARIABLE_REF && (mDecValue->mFlags & DTF_CONST) && mDecValue->mBase->mValue && mDecValue->mBase->mValue->mType == EX_CONSTANT && mDecValue->mBase->mValue->mDecValue->mType == DT_CONST_STRUCT)
{
Declaration* mdec = mDecValue->mBase->mValue->mDecValue->mParams;
int coffset = mDecValue->mOffset;
while (mdec)
{
if (mdec->mType == DT_CONST_STRUCT)
{
if (mdec->mOffset > coffset || mdec->mOffset + mdec->mSize <= coffset)
mdec = mdec->mNext;
else
{
coffset -= mdec->mOffset;
mdec = mdec->mParams;
}
}
else if (mdec->mOffset != coffset)
mdec = mdec->mNext;
else
{
Expression* ex = new Expression(mLocation, EX_CONSTANT);
ex->mDecValue = mdec;
ex->mDecType = mDecType;
return ex;
}
}
}
}
return this;
}
Expression* Expression::ConstantFold(Errors * errors, LinkerSection * dataSection, Linker* linker)
{
if (mType == EX_PREFIX && mToken == TK_BANKOF && linker)
@ -925,21 +963,6 @@ Expression* Expression::ConstantFold(Errors * errors, LinkerSection * dataSectio
{
int offset = int(mDecType->mSize * mRight->mDecValue->mInteger);
if (mDecType->IsSimpleType() && (mLeft->mDecValue->mFlags & DTF_CONST) && mLeft->mDecValue->mValue && mLeft->mDecValue->mValue->mType == EX_CONSTANT && mLeft->mDecValue->mValue->mDecValue->mType == DT_CONST_STRUCT)
{
Declaration* mdec = mLeft->mDecValue->mValue->mDecValue->mParams;
while (mdec && mdec->mOffset != offset)
mdec = mdec->mNext;
if (mdec)
{
Expression* ex = new Expression(mLocation, EX_CONSTANT);
ex->mDecValue = mdec;
ex->mDecType = mDecType;
return ex;
}
}
Expression* ex = new Expression(mLocation, EX_VARIABLE);
Declaration* dec = new Declaration(mLocation, DT_VARIABLE_REF);
dec->mFlags = mLeft->mDecValue->mFlags;
@ -956,35 +979,6 @@ Expression* Expression::ConstantFold(Errors * errors, LinkerSection * dataSectio
{
int offset = mLeft->mDecValue->mOffset + int(mDecType->mSize * mRight->mDecValue->mInteger);
if (mDecType->IsSimpleType() && (mLeft->mDecValue->mFlags & DTF_CONST) && mLeft->mDecValue->mBase->mValue && mLeft->mDecValue->mBase->mValue->mType == EX_CONSTANT && mLeft->mDecValue->mBase->mValue->mDecValue->mType == DT_CONST_STRUCT)
{
Declaration* mdec = mLeft->mDecValue->mBase->mValue->mDecValue->mParams;
int coffset = offset;
while (mdec)
{
if (mdec->mType == DT_CONST_STRUCT)
{
if (mdec->mOffset > coffset || mdec->mOffset + mdec->mSize <= coffset)
mdec = mdec->mNext;
else
{
coffset -= mdec->mOffset;
mdec = mdec->mParams;
}
}
else if (mdec->mOffset != coffset)
mdec = mdec->mNext;
else
{
Expression* ex = new Expression(mLocation, EX_CONSTANT);
ex->mDecValue = mdec;
ex->mDecType = mDecType;
return ex;
}
}
}
Expression* ex = new Expression(mLocation, EX_VARIABLE);
Declaration* dec = new Declaration(mLocation, DT_VARIABLE_REF);
dec->mFlags = mLeft->mDecValue->mFlags;

1
oscar64/Declaration.h
View File

@ -248,6 +248,7 @@ public:
Expression* LogicInvertExpression(void);
Expression* ConstantFold(Errors * errors, LinkerSection* dataSection, Linker * linker = nullptr);
Expression* ConstantDereference(void);
bool HasSideEffects(void) const;
bool IsSame(const Expression* exp) const;

2
oscar64/Parser.cpp
View File

@ -1405,6 +1405,8 @@ Declaration* Parser::ReverseDeclaration(Declaration* odec, Declaration* bdec)
Declaration * Parser::CopyConstantInitializer(int offset, Declaration* dtype, Expression* exp)
{
exp = exp->ConstantDereference();
Declaration* dec = exp->mDecValue;
if (exp->mType == EX_CONSTANT)

2
oscar64/oscar64.cpp
View File

@ -75,7 +75,7 @@ int main2(int argc, const char** argv)
#else
strcpy(strProductName, "oscar64");
strcpy(strProductVersion, "1.27.241");
strcpy(strProductVersion, "1.27.242");
#ifdef __APPLE__
uint32_t length = sizeof(basePath);

8
oscar64/oscar64.rc
View File

@ -25,8 +25,8 @@ LANGUAGE LANG_ENGLISH, SUBLANG_NEUTRAL
//
VS_VERSION_INFO VERSIONINFO
FILEVERSION 1,27,241,0
PRODUCTVERSION 1,27,241,0
FILEVERSION 1,27,242,0
PRODUCTVERSION 1,27,242,0
FILEFLAGSMASK 0x3fL
#ifdef _DEBUG
FILEFLAGS 0x1L
@ -43,12 +43,12 @@ BEGIN
BEGIN
VALUE "CompanyName", "oscar64"
VALUE "FileDescription", "oscar64 compiler"
VALUE "FileVersion", "1.27.241.0"
VALUE "FileVersion", "1.27.242.0"
VALUE "InternalName", "oscar64.exe"
VALUE "LegalCopyright", "Copyright (C) 2021"
VALUE "OriginalFilename", "oscar64.exe"
VALUE "ProductName", "oscar64"
VALUE "ProductVersion", "1.27.241.0"
VALUE "ProductVersion", "1.27.242.0"
END
END
BLOCK "VarFileInfo"