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view ir/irtypestruct.h @ 1499:df11cdec45a2
Another shot at fixing the issues with (constant) struct literals and their addresses. See DMD2682, #218, #324.
The idea is to separate the notion of const from 'this variable can always be
replaced with its initializer' in the frontend. To do that, I introduced
Declaration::isSameAsInitializer, which is overridden in VarDeclaration to
return false for constants that have a struct literal initializer.
So
{{{
const S s = S(5);
void foo() { auto ps = &s; }
// is no longer replaced by
void foo() { auto ps = &(S(5)); }
}}}
To make taking the address of a struct constant with a struct-initializer
outside of function scope possible, I made sure that AddrExp::optimize doesn't
try to run the argument's optimization with WANTinterpret - that'd again
replace the constant with a struct literal temporary.
author | Christian Kamm <kamm incasoftware de> |
---|---|
date | Sun, 14 Jun 2009 19:49:58 +0200 |
parents | dd135ff697fa |
children |
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#ifndef __LDC_IR_IRTYPESTRUCT_H__ #define __LDC_IR_IRTYPESTRUCT_H__ #include "ir/irtype.h" ////////////////////////////////////////////////////////////////////////////// struct AggregateDeclaration; struct StructDeclaration; struct TypeStruct; ////////////////////////////////////////////////////////////////////////////// class IrTypeAggr : public IrType { public: /// IrTypeAggr(AggregateDeclaration* ad); /// IrTypeAggr* isAggr() { return this; } /// typedef std::vector<VarDeclaration*>::iterator iterator; /// iterator def_begin() { return default_fields.begin(); } /// iterator def_end() { return default_fields.end(); } protected: /// AggregateDeclaration this type represents. AggregateDeclaration* aggr; /// Sorted list of all default fields. /// A default field is a field that contributes to the default initializer /// and the default type, and thus it has it's own unique GEP index into /// the aggregate. /// For classes, field of any super classes are not included. std::vector<VarDeclaration*> default_fields; }; ////////////////////////////////////////////////////////////////////////////// class IrTypeStruct : public IrTypeAggr { public: /// IrTypeStruct(StructDeclaration* sd); /// IrTypeStruct* isStruct() { return this; } /// const llvm::Type* buildType(); protected: /// StructDeclaration this type represents. StructDeclaration* sd; /// DMD TypeStruct of this type. TypeStruct* ts; }; ////////////////////////////////////////////////////////////////////////////// #endif