view ir/irdsymbol.h @ 1410:cc2d8a7388c7

Count the sret register as well when keeping track of how many integer registers are available for extern(C) functions on x86-64. Interestingly, llvm-g++ seems to have a very similar bug: http://llvm.org/pr4242 (So this breaks ABI-compatibility with llvm-gcc for this corner case, but gains it with gcc...) To clarify, this is about code like this: {{{ struct S { void*[3] data; } struct T { void*[2] data; } // The T should be passed in memory, and p in the last int register. extern(C) S fail(int, int, int, int, T t, void* p) { S s; s.data[0] = t.data[0]; s.data[1] = t.data[1]; s.data[2] = p; return s; } }}} which should generate code functionally equivalent to this: {{{ extern(C) S* succeed(S* s, int, int, int, int, T t, void* p) { s.data[0] = t.data[0]; s.data[1] = t.data[1]; s.data[2] = p; return s; } }}} (with the same definitions for S and T)
author Frits van Bommel <fvbommel wxs.nl>
date Fri, 22 May 2009 13:17:06 +0200
parents 1860414bf3b7
children
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#ifndef LDC_IR_IRDSYMBOL_H
#define LDC_IR_IRDSYMBOL_H

#include <set>

struct IrModule;
struct IrFunction;
struct IrStruct;
struct IrGlobal;
struct IrLocal;
struct IrField;
struct IrVar;
struct Dsymbol;

namespace llvm {
    struct Value;
}

struct IrDsymbol
{
    static std::set<IrDsymbol*> list;
    static void resetAll();

    // overload all of these to make sure
    // the static list is up to date
    IrDsymbol();
    IrDsymbol(const IrDsymbol& s);
    ~IrDsymbol();

    void reset();

    Module* DModule;

    bool resolved;
    bool declared;
    bool initialized;
    bool defined;

    IrModule* irModule;

    IrStruct* irStruct;

    IrFunction* irFunc;

    IrGlobal* irGlobal;
    IrLocal* irLocal;
    IrField* irField;
    IrVar* getIrVar();
    llvm::Value*& getIrValue();

    bool isSet();
};

#endif