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Debug Info: Reorganized and generalized the layout of the __apple_ast

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section based on feedback from Greg.

Swift SVN r7443
This commit is contained in:
Adrian Prantl
2013-08-22 00:49:15 +00:00
parent a56893dec2
commit 6f7048c75a
2 changed files with 23 additions and 25 deletions
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25
lib/IRGen/IRGenDebugInfo.cpp
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@@ -24,7 +24,6 @@
#include "llvm/DebugInfo.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
@@ -46,30 +45,6 @@ using namespace swift;
using namespace irgen;
//===--- BEGIN "TO BE FIXED IN A SWIFT BRANCH OF LLVM" ---===//
//
// DWARF constants.
//
// The first unused language value in DWARF v5 is DW_LANG_Haskell+1 =
// 0x19. We can't use it, because LLVM asserts that there are no
// languages >DW_LANG_Python=0x14. Wouldn't it would be much more
// appropriate to use a constant in DW_LANG_lo_user..DW_LANG_hi_user
// anyway, you may ask? Well, CompileUnit::constructTypeDIE() will
// always use a DW_FORM_data1, which is too small for that range! And
// by fixing that in LLVM we would hint at developing a new language.
// So instead, let's hijack a language with a very low potential for
// accidental conflicts for now.
static const unsigned DW_LANG_Swift = 0xf;
static const unsigned DW_LANG_ObjC = llvm::dwarf::DW_LANG_ObjC; // For symmetry.
//
// Reuse some existing tag so the verifier doesn't complain.
static const unsigned DW_TAG_meta_type = llvm::dwarf::DW_TAG_restrict_type;
//
//===--------- END "TO BE FIXED IN A SWIFT BRANCH OF LLVM" --------===//
/// Strdup a raw char array using the bump pointer.
static
StringRef BumpAllocatedString(const char* Data, size_t Length,