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platform_system_core
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Track lvalues vs. rvalues.

This commit is contained in:
Jack Palevich 2009-07-17 10:20:32 -07:00
parent 3377bfd845
commit ba929a4ffa
1 changed files with 24 additions and 5 deletions
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29
libacc/acc.cpp
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@ -144,6 +144,20 @@ class Compiler : public ErrorSink {
Type* pTail;
};
enum ExpressionType {
ET_RVALUE,
ET_LVALUE
};
struct ExpressionValue {
ExpressionValue() {
et = ET_RVALUE;
pType = NULL;
}
ExpressionType et;
Type* pType;
};
class CodeBuf {
char* ind; // Output code pointer
char* pProgramBase;
@ -468,7 +482,7 @@ class Compiler : public ErrorSink {
virtual size_t stackSizeOf(Type* pType) = 0;
virtual Type* getR0Type() {
return mExpressionStack.back();
return mExpressionStack.back().pType;
}
protected:
@ -510,15 +524,20 @@ class Compiler : public ErrorSink {
}
void setR0Type(Type* pType) {
mExpressionStack.back() = pType;
mExpressionStack.back().pType = pType;
}
Type* getTOSType() {
return mExpressionStack[mExpressionStack.size()-2];
return mExpressionStack[mExpressionStack.size()-2].pType;
}
void pushType() {
mExpressionStack.push_back(NULL);
if (mExpressionStack.size()) {
mExpressionStack.push_back(mExpressionStack.back());
} else {
mExpressionStack.push_back(ExpressionValue());
}
}
void popType() {
@ -551,7 +570,7 @@ class Compiler : public ErrorSink {
Type* mkpInt;
private:
Vector<Type*> mExpressionStack;
Vector<ExpressionValue> mExpressionStack;
CodeBuf* pCodeBuf;
ErrorSink* mErrorSink;
};