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 Module *getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer,
33 SMDiagnostic &Err, LLVMContext &Context) {
34 if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
35 (const unsigned char *)Buffer->getBufferEnd())) {
37 ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer.get(), Context);
38 if (std::error_code EC = ModuleOrErr.getError()) {
39 Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
43 // getLazyBitcodeModule takes ownership of the Buffer when successful.
45 return ModuleOrErr.get();
48 return ParseAssembly(std::move(Buffer), nullptr, Err, Context);
51 Module *llvm::getLazyIRFileModule(const std::string &Filename,
52 SMDiagnostic &Err, LLVMContext &Context) {
53 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
54 MemoryBuffer::getFileOrSTDIN(Filename);
55 if (std::error_code EC = FileOrErr.getError()) {
56 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
57 "Could not open input file: " + EC.message());
61 return getLazyIRModule(std::move(FileOrErr.get()), Err, Context);
64 Module *llvm::ParseIR(MemoryBuffer *Buffer, SMDiagnostic &Err,
65 LLVMContext &Context) {
66 NamedRegionTimer T(TimeIRParsingName, TimeIRParsingGroupName,
68 if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
69 (const unsigned char *)Buffer->getBufferEnd())) {
70 ErrorOr<Module *> ModuleOrErr = parseBitcodeFile(Buffer, Context);
72 if (std::error_code EC = ModuleOrErr.getError())
73 Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
76 M = ModuleOrErr.get();
77 // parseBitcodeFile does not take ownership of the Buffer.
81 return ParseAssembly(std::unique_ptr<MemoryBuffer>(MemoryBuffer::getMemBuffer(
82 Buffer->getBuffer(), Buffer->getBufferIdentifier())),
83 nullptr, Err, Context);
86 Module *llvm::ParseIRFile(const std::string &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)));
114 raw_string_ostream os(buf);
116 Diag.print(nullptr, os, false);
119 *OutMessage = strdup(buf.c_str());