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view dmd/import.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 | e83ba4ae4878 |
children | def7a1d494fd |
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// Compiler implementation of the D programming language // Copyright (c) 1999-2007 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_IMPORT_H #define DMD_IMPORT_H #ifdef __DMC__ #pragma once #endif /* __DMC__ */ #include "dsymbol.h" struct Identifier; struct Scope; struct OutBuffer; struct Module; struct Package; struct AliasDeclaration; #ifdef _DH struct HdrGenState; #endif struct Import : Dsymbol { Array *packages; // array of Identifier's representing packages Identifier *id; // module Identifier Identifier *aliasId; int isstatic; // !=0 if static import enum PROT protection; // Pairs of alias=name to bind into current namespace Array names; Array aliases; Array aliasdecls; // AliasDeclarations for names/aliases Module *mod; Package *pkg; // leftmost package/module Import(Loc loc, Array *packages, Identifier *id, Identifier *aliasId, int isstatic); void addAlias(Identifier *name, Identifier *alias); const char *kind(); enum PROT prot(); Dsymbol *syntaxCopy(Dsymbol *s); // copy only syntax trees void load(Scope *sc); void semantic(Scope *sc); void semantic2(Scope *sc); Dsymbol *toAlias(); int addMember(Scope *sc, ScopeDsymbol *s, int memnum); Dsymbol *search(Loc loc, Identifier *ident, int flags); int overloadInsert(Dsymbol *s); void toCBuffer(OutBuffer *buf, HdrGenState *hgs); Import *isImport() { return this; } }; #endif /* DMD_IMPORT_H */