mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-26 04:32:44 +01:00
35984a8849
of requiring a name be passed in. This makes it use "<stdin>" instead of "-" and makes it more consistent with the Bitcode reader. llvm-svn: 81256
116 lines
4.3 KiB
C++
116 lines
4.3 KiB
C++
//===---- llvm/Support/IRReader.h - Reader for LLVM IR files ----*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines functions for reading LLVM IR. They support both
|
|
// Bitcode and Assembly, automatically detecting the input format.
|
|
//
|
|
// These functions must be defined in a header file in order to avoid
|
|
// library dependencies, since they reference both Bitcode and Assembly
|
|
// functions.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SUPPORT_IRREADER_H
|
|
#define LLVM_SUPPORT_IRREADER_H
|
|
|
|
#include "llvm/Assembly/Parser.h"
|
|
#include "llvm/Bitcode/ReaderWriter.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "llvm/ModuleProvider.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// If the given MemoryBuffer holds a bitcode image, return a ModuleProvider
|
|
/// for it which does lazy deserialization of function bodies. Otherwise,
|
|
/// attempt to parse it as LLVM Assembly and return a fully populated
|
|
/// ModuleProvider. This function *always* takes ownership of the given
|
|
/// MemoryBuffer.
|
|
inline ModuleProvider *getIRModuleProvider(MemoryBuffer *Buffer,
|
|
SMDiagnostic &Err,
|
|
LLVMContext &Context) {
|
|
if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
|
|
(const unsigned char *)Buffer->getBufferEnd())) {
|
|
std::string ErrMsg;
|
|
ModuleProvider *MP = getBitcodeModuleProvider(Buffer, Context, &ErrMsg);
|
|
if (MP == 0) {
|
|
Err = SMDiagnostic(Buffer->getBufferIdentifier(), -1, -1, ErrMsg, "");
|
|
// ParseBitcodeFile does not take ownership of the Buffer in the
|
|
// case of an error.
|
|
delete Buffer;
|
|
}
|
|
return MP;
|
|
}
|
|
|
|
Module *M = ParseAssembly(Buffer, 0, Err, Context);
|
|
if (M == 0)
|
|
return 0;
|
|
return new ExistingModuleProvider(M);
|
|
}
|
|
|
|
/// If the given file holds a bitcode image, return a ModuleProvider
|
|
/// for it which does lazy deserialization of function bodies. Otherwise,
|
|
/// attempt to parse it as LLVM Assembly and return a fully populated
|
|
/// ModuleProvider.
|
|
inline ModuleProvider *getIRFileModuleProvider(const std::string &Filename,
|
|
SMDiagnostic &Err,
|
|
LLVMContext &Context) {
|
|
std::string ErrMsg;
|
|
MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrMsg);
|
|
if (F == 0) {
|
|
Err = SMDiagnostic(Filename, -1, -1,
|
|
"Could not open input file '" + Filename + "'", "");
|
|
return 0;
|
|
}
|
|
|
|
return getIRModuleProvider(F, Err, Context);
|
|
}
|
|
|
|
/// If the given MemoryBuffer holds a bitcode image, return a Module
|
|
/// for it. Otherwise, attempt to parse it as LLVM Assembly and return
|
|
/// a Module for it. This function *always* takes ownership of the given
|
|
/// MemoryBuffer.
|
|
inline Module *ParseIR(MemoryBuffer *Buffer,
|
|
SMDiagnostic &Err,
|
|
LLVMContext &Context) {
|
|
if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
|
|
(const unsigned char *)Buffer->getBufferEnd())) {
|
|
std::string ErrMsg;
|
|
Module *M = ParseBitcodeFile(Buffer, Context, &ErrMsg);
|
|
// ParseBitcodeFile does not take ownership of the Buffer.
|
|
delete Buffer;
|
|
if (M == 0)
|
|
Err = SMDiagnostic(Buffer->getBufferIdentifier(), -1, -1, ErrMsg, "");
|
|
return M;
|
|
}
|
|
|
|
return ParseAssembly(Buffer, 0, Err, Context);
|
|
}
|
|
|
|
/// If the given file holds a bitcode image, return a Module for it.
|
|
/// Otherwise, attempt to parse it as LLVM Assembly and return a Module
|
|
/// for it.
|
|
inline Module *ParseIRFile(const std::string &Filename,
|
|
SMDiagnostic &Err,
|
|
LLVMContext &Context) {
|
|
std::string ErrMsg;
|
|
MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrMsg);
|
|
if (F == 0) {
|
|
Err = SMDiagnostic(Filename, -1, -1,
|
|
"Could not open input file '" + Filename + "'", "");
|
|
return 0;
|
|
}
|
|
|
|
return ParseIR(F, Err, Context);
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|