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view ir/irvar.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 | 0c03ba6f7c24 |
children |
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#ifndef LDC_IR_IRVAR_H #define LDC_IR_IRVAR_H #include "ir/ir.h" #include "llvm/Type.h" struct IrVar : IrBase { IrVar(VarDeclaration* var); VarDeclaration* V; llvm::Value* value; }; // represents a global variable struct IrGlobal : IrVar { IrGlobal(VarDeclaration* v); llvm::PATypeHolder type; llvm::Constant* constInit; }; // represents a local variable variable struct IrLocal : IrVar { IrLocal(VarDeclaration* v); bool byref; // Not used for -nested-ctx=array int nestedDepth; // ditto int nestedIndex; }; // represents an aggregate field variable struct IrField : IrVar { IrField(VarDeclaration* v); unsigned index; unsigned unionOffset; llvm::Constant* getDefaultInit(); protected: /// FIXME: only used for StructLiteralsExps llvm::Constant* constInit; }; #endif