view gen/linkage.h @ 1064:f0b6549055ab

Make LDC work with LLVM trunk (s/LinkOnceLinkage/LinkOnceOdrLinkage/) Also moved the #defines for linkage types into a separate header instead of mars.h so we can #include revisions.h without having to rebuild the entire frontend every time we update. (I'm using revisions.h to get the LLVM revision for use in preprocessor conditionals. It should work with LLVM release 2.5, old trunk and new trunk)
author Frits van Bommel <fvbommel wxs.nl>
date Sun, 08 Mar 2009 16:13:10 +0100
parents
children 123812e02bc8
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#ifndef LDC_GEN_LINKAGE_H
#define LDC_GEN_LINKAGE_H

#include "gen/revisions.h"

// Make it easier to test new linkage types
// Also used to adapt to some changes in LLVM between 2.5 and 2.6


// LLVM r66339 introduces LinkOnceODRLinkage, which is just what we want here.
// (It also renamed LinkOnceLinkage, so this #if is needed for LDC to compile
// with both 2.5 and trunk)
#if LLVM_REV >= 66339
#  define TEMPLATE_LINKAGE_TYPE         llvm::GlobalValue::LinkOnceODRLinkage
#  define TYPEINFO_LINKAGE_TYPE         llvm::GlobalValue::LinkOnceODRLinkage
// The One-Definition-Rule shouldn't matter for debug info, right?
#  define DEBUGINFO_LINKONCE_LINKAGE_TYPE \
                                        llvm::GlobalValue::LinkOnceAnyLinkage

// For 2.5 and any LLVM revision before 66339 we want to use LinkOnceLinkage
// It's equivalent to LinkOnceAnyLinkage in trunk except that the inliner had a
// hack (removed in r66339) to allow inlining of templated functions even though
// LinkOnce doesn't technically allow that.
#else
#  define TEMPLATE_LINKAGE_TYPE         llvm::GlobalValue::LinkOnceLinkage
#  define TYPEINFO_LINKAGE_TYPE         llvm::GlobalValue::LinkOnceLinkage
#  define DEBUGINFO_LINKONCE_LINKAGE_TYPE \
                                        llvm::GlobalValue::LinkOnceLinkage
#endif

#endif