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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 229e02867307
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_HTML_H
#define DMD_HTML_H 1

struct OutBuffer;

struct Html
{
    const char *sourcename;

    unsigned char *base;	// pointer to start of buffer
    unsigned char *end;		// past end of buffer
    unsigned char *p;		// current character
    unsigned linnum;		// current line number
    OutBuffer *dbuf;		// code source buffer
    int inCode;			// !=0 if in code


    Html(const char *sourcename, unsigned char *base, unsigned length);

    void error(const char *format, ...) IS_PRINTF(2);
    void extractCode(OutBuffer *buf);
    void skipTag();
    void skipString();
    unsigned char *skipWhite(unsigned char *q);
    void scanComment();
    int isCommentStart();
    void scanCDATA();
    int isCDATAStart();
    int charEntity();
    static int namedEntity(unsigned char *p, int length);
};

#endif