BitcodeReader.cpp File Reference

#include "llvm/Bitcode/ReaderWriter.h"
#include "BitcodeReader.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/InlineAsm.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/AutoUpgrade.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/OperandTraits.h"

Include dependency graph for BitcodeReader.cpp:

Go to the source code of this file.

Namespaces
namespace	llvm
Classes
struct	llvm::OperandTraits< ConstantPlaceHolder >
Functions
template<typename StrTy>
static bool	ConvertToString (SmallVector< uint64_t, 64 > &Record, unsigned Idx, StrTy &Result)
static GlobalValue::LinkageTypes	GetDecodedLinkage (unsigned Val)
static GlobalValue::VisibilityTypes	GetDecodedVisibility (unsigned Val)
static int	GetDecodedCastOpcode (unsigned Val)
static int	GetDecodedBinaryOpcode (unsigned Val, const Type *Ty)
static uint64_t	DecodeSignRotatedValue (uint64_t V)
static bool	SkipWrapperHeader (unsigned char *&BufPtr, unsigned char *&BufEnd)
ModuleProvider *	llvm::getBitcodeModuleProvider (MemoryBuffer *Buffer, std::string *ErrMsg=0)
Module *	llvm::ParseBitcodeFile (MemoryBuffer *Buffer, std::string *ErrMsg=0)

---

Function Documentation

template<typename StrTy>

static bool ConvertToString	(	SmallVector< uint64_t, 64 > &	Record,
		unsigned	Idx,
		StrTy &	Result
	)			[inline, static]

ConvertToString - Convert a string from a record into an std::string, return true on failure.

Definition at line 48 of file BitcodeReader.cpp.

References llvm::SmallVectorImpl< T >::size().

static uint64_t DecodeSignRotatedValue

(

uint64_t

V

)

[static]

DecodeSignRotatedValue - Decode a signed value stored with the sign bit in the LSB for dense VBR encoding.

Definition at line 669 of file BitcodeReader.cpp.

static int GetDecodedBinaryOpcode	(	unsigned	Val,
		const Type *	Ty
	)			[static]

Definition at line 99 of file BitcodeReader.cpp.

References Add(), And(), llvm::bitc::BINOP_ADD, llvm::bitc::BINOP_AND, llvm::bitc::BINOP_ASHR, llvm::bitc::BINOP_LSHR, llvm::bitc::BINOP_MUL, llvm::bitc::BINOP_OR, llvm::bitc::BINOP_SDIV, llvm::bitc::BINOP_SHL, llvm::bitc::BINOP_SREM, llvm::bitc::BINOP_SUB, llvm::bitc::BINOP_UDIV, llvm::bitc::BINOP_UREM, llvm::bitc::BINOP_XOR, llvm::Type::isFPOrFPVector(), LShr, llvm::APIntOps::Or(), and llvm::APIntOps::Xor().

static int GetDecodedCastOpcode

(

unsigned

Val

)

[static]

Definition at line 82 of file BitcodeReader.cpp.

References BitCast, llvm::bitc::CAST_BITCAST, llvm::bitc::CAST_FPEXT, llvm::bitc::CAST_FPTOSI, llvm::bitc::CAST_FPTOUI, llvm::bitc::CAST_FPTRUNC, llvm::bitc::CAST_INTTOPTR, llvm::bitc::CAST_PTRTOINT, llvm::bitc::CAST_SEXT, llvm::bitc::CAST_SITOFP, llvm::bitc::CAST_TRUNC, llvm::bitc::CAST_UITOFP, llvm::bitc::CAST_ZEXT, FPToUI, FPTrunc, PtrToInt, llvm::Attribute::SExt, UIToFP, and ZExt.

static GlobalValue::LinkageTypes GetDecodedLinkage

(

unsigned

Val

)

[static]

Definition at line 58 of file BitcodeReader.cpp.

References llvm::GlobalValue::AppendingLinkage, llvm::GlobalValue::CommonLinkage, llvm::GlobalValue::DLLExportLinkage, llvm::GlobalValue::DLLImportLinkage, llvm::GlobalValue::ExternalLinkage, llvm::GlobalValue::ExternalWeakLinkage, llvm::GlobalValue::InternalLinkage, llvm::GlobalValue::LinkOnceLinkage, and llvm::GlobalValue::WeakLinkage.

static GlobalValue::VisibilityTypes GetDecodedVisibility

(

unsigned

Val

)

[static]

Definition at line 73 of file BitcodeReader.cpp.

References llvm::GlobalValue::DefaultVisibility, llvm::GlobalValue::HiddenVisibility, and llvm::GlobalValue::ProtectedVisibility.

static bool SkipWrapperHeader	(	unsigned char *&	BufPtr,
		unsigned char *&	BufEnd
	)			[static]

SkipWrapperHeader - Some systems wrap bc files with a special header for padding or other reasons. The format of this header is:

struct bc_header { uint32_t Magic; // 0x0B17C0DE uint32_t Version; // Version, currently always 0. uint32_t BitcodeOffset; // Offset to traditional bitcode file. uint32_t BitcodeSize; // Size of traditional bitcode file. ... potentially other gunk ... };

This function is called when we find a file with a matching magic number. In this case, skip down to the subsection of the file that is actually a BC file.

Definition at line 1287 of file BitcodeReader.cpp.

References Offset.

Referenced by llvm::BitcodeReader::ParseBitcode().