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view ir/irtype.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 | 81121ac19f61 |
children |
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#ifndef __LDC_IR_IRTYPE_H__ #define __LDC_IR_IRTYPE_H__ #include "llvm/Type.h" ////////////////////////////////////////////////////////////////////////////// // forward declarations struct Type; class IrTypeAggr; class IrTypeArray; class IrTypeBasic; class IrTypeClass; class IrTypeDelegate; class IrTypeFunction; class IrTypePointer; class IrTypeSArray; class IrTypeStruct; ////////////////////////////////////////////////////////////////////////////// /// Base class for IrTypeS. class IrType { public: /// IrType(Type* dt, const llvm::Type* lt); /// virtual IrTypeAggr* isAggr() { return NULL; } /// virtual IrTypeArray* isArray() { return NULL; } /// virtual IrTypeBasic* isBasic() { return NULL; } /// virtual IrTypeClass* isClass() { return NULL; } /// virtual IrTypeDelegate* isDelegate(){ return NULL; } /// virtual IrTypeFunction* isFunction(){ return NULL; } /// virtual IrTypePointer* isPointer() { return NULL; } /// virtual IrTypeSArray* isSArray() { return NULL; } /// virtual IrTypeStruct* isStruct() { return NULL; } /// Type* getD() { return dtype; } /// virtual const llvm::Type* get() { return pa.get(); } /// llvm::PATypeHolder& getPA() { return pa; } /// virtual const llvm::Type* buildType() = 0; protected: /// Type* dtype; /// LLVM type holder. llvm::PATypeHolder pa; }; ////////////////////////////////////////////////////////////////////////////// /// IrType for basic D types. class IrTypeBasic : public IrType { public: /// IrTypeBasic(Type* dt); /// IrTypeBasic* isBasic() { return this; } /// const llvm::Type* buildType(); protected: /// const llvm::Type* basic2llvm(Type* t); }; ////////////////////////////////////////////////////////////////////////////// /// IrType from pointers. class IrTypePointer : public IrType { public: /// IrTypePointer(Type* dt); /// IrTypePointer* isPointer() { return this; } /// const llvm::Type* buildType(); protected: /// const llvm::Type* pointer2llvm(Type* t); }; ////////////////////////////////////////////////////////////////////////////// /// IrType for static arrays class IrTypeSArray : public IrType { public: /// IrTypeSArray(Type* dt); /// IrTypeSArray* isSArray() { return this; } /// const llvm::Type* buildType(); protected: /// const llvm::Type* sarray2llvm(Type* t); /// Dimension. uint64_t dim; }; ////////////////////////////////////////////////////////////////////////////// /// IrType for dynamic arrays class IrTypeArray : public IrType { public: /// IrTypeArray(Type* dt); /// IrTypeArray* isArray() { return this; } /// const llvm::Type* buildType(); protected: /// const llvm::Type* array2llvm(Type* t); }; ////////////////////////////////////////////////////////////////////////////// #endif