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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 c53b6e3fe49a
children
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// Compiler implementation of the D programming language
// Copyright (c) 1999-2006 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// http://www.digitalmars.com
// License for redistribution is by either the Artistic License
// in artistic.txt, or the GNU General Public License in gnu.txt.
// See the included readme.txt for details.

#ifndef DMD_MACRO_H
#define DMD_MACRO_H 1

#include <stdio.h>
#include <string.h>
#include <time.h>
#include <ctype.h>

#include "root.h"


class Macro
{
    Macro *next;		// next in list

    unsigned char *name;	// macro name
    size_t namelen;		// length of macro name

    unsigned char *text;	// macro replacement text
    size_t textlen;		// length of replacement text

    int inuse;			// macro is in use (don't expand)

    Macro(unsigned char *name, size_t namelen, unsigned char *text, size_t textlen);
    Macro *search(unsigned char *name, size_t namelen);

  public:
    static Macro *define(Macro **ptable, unsigned char *name, size_t namelen, unsigned char *text, size_t textlen);

    void expand(OutBuffer *buf, unsigned start, unsigned *pend,
	unsigned char *arg, unsigned arglen);
};

#endif