1 //===---- IRReader.cpp - Reader for LLVM IR files -------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/IRReader/IRReader.h"
11 #include "llvm-c/Core.h"
12 #include "llvm-c/IRReader.h"
13 #include "llvm/AsmParser/Parser.h"
14 #include "llvm/Bitcode/ReaderWriter.h"
15 #include "llvm/IR/LLVMContext.h"
16 #include "llvm/IR/Module.h"
17 #include "llvm/Support/MemoryBuffer.h"
18 #include "llvm/Support/SourceMgr.h"
19 #include "llvm/Support/Timer.h"
20 #include "llvm/Support/raw_ostream.h"
21 #include <system_error>
26 extern bool TimePassesIsEnabled;
29 static const char *const TimeIRParsingGroupName = "LLVM IR Parsing";
30 static const char *const TimeIRParsingName = "Parse IR";
32 static std::unique_ptr<Module>
33 getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer, SMDiagnostic &Err,
34 LLVMContext &Context) {
35 if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
36 (const unsigned char *)Buffer->getBufferEnd())) {
38 ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer.get(), Context);
39 if (std::error_code EC = ModuleOrErr.getError()) {
40 Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
44 // getLazyBitcodeModule takes ownership of the Buffer when successful.
46 return std::unique_ptr<Module>(ModuleOrErr.get());
49 return parseAssembly(std::move(Buffer), Err, Context);
52 std::unique_ptr<Module> llvm::getLazyIRFileModule(StringRef Filename,
54 LLVMContext &Context) {
55 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
56 MemoryBuffer::getFileOrSTDIN(Filename);
57 if (std::error_code EC = FileOrErr.getError()) {
58 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
59 "Could not open input file: " + EC.message());
63 return getLazyIRModule(std::move(FileOrErr.get()), Err, Context);
66 std::unique_ptr<Module> llvm::parseIR(MemoryBuffer *Buffer, SMDiagnostic &Err,
67 LLVMContext &Context) {
68 NamedRegionTimer T(TimeIRParsingName, TimeIRParsingGroupName,
70 if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
71 (const unsigned char *)Buffer->getBufferEnd())) {
72 ErrorOr<Module *> ModuleOrErr = parseBitcodeFile(Buffer, Context);
73 if (std::error_code EC = ModuleOrErr.getError()) {
74 Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
78 return std::unique_ptr<Module>(ModuleOrErr.get());
81 return parseAssembly(std::unique_ptr<MemoryBuffer>(MemoryBuffer::getMemBuffer(
82 Buffer->getBuffer(), Buffer->getBufferIdentifier())),
86 std::unique_ptr<Module> llvm::parseIRFile(StringRef Filename, SMDiagnostic &Err,
87 LLVMContext &Context) {
88 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
89 MemoryBuffer::getFileOrSTDIN(Filename);
90 if (std::error_code EC = FileOrErr.getError()) {
91 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
92 "Could not open input file: " + EC.message());
96 return parseIR(FileOrErr.get().get(), Err, Context);
99 //===----------------------------------------------------------------------===//
101 //===----------------------------------------------------------------------===//
103 LLVMBool LLVMParseIRInContext(LLVMContextRef ContextRef,
104 LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
108 std::unique_ptr<MemoryBuffer> MB(unwrap(MemBuf));
109 *OutM = wrap(parseIR(MB.get(), Diag, *unwrap(ContextRef)).release());
114 raw_string_ostream os(buf);
116 Diag.print(nullptr, os, false);
119 *OutMessage = strdup(buf.c_str());