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 =
39 getLazyBitcodeModule(std::move(Buffer), Context);
40 if (std::error_code EC = ModuleOrErr.getError()) {
41 Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
45 return std::unique_ptr<Module>(ModuleOrErr.get());
48 return parseAssembly(Buffer->getMemBufferRef(), Err, Context);
51 std::unique_ptr<Module> llvm::getLazyIRFileModule(StringRef Filename,
53 LLVMContext &Context) {
54 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
55 MemoryBuffer::getFileOrSTDIN(Filename);
56 if (std::error_code EC = FileOrErr.getError()) {
57 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
58 "Could not open input file: " + EC.message());
62 return getLazyIRModule(std::move(FileOrErr.get()), Err, Context);
65 std::unique_ptr<Module> llvm::parseIR(MemoryBufferRef Buffer, SMDiagnostic &Err,
66 LLVMContext &Context) {
67 NamedRegionTimer T(TimeIRParsingName, TimeIRParsingGroupName,
69 if (isBitcode((const unsigned char *)Buffer.getBufferStart(),
70 (const unsigned char *)Buffer.getBufferEnd())) {
71 ErrorOr<Module *> ModuleOrErr = parseBitcodeFile(Buffer, Context);
72 if (std::error_code EC = ModuleOrErr.getError()) {
73 Err = SMDiagnostic(Buffer.getBufferIdentifier(), SourceMgr::DK_Error,
77 return std::unique_ptr<Module>(ModuleOrErr.get());
80 return parseAssembly(Buffer, Err, Context);
83 std::unique_ptr<Module> llvm::parseIRFile(StringRef Filename, SMDiagnostic &Err,
84 LLVMContext &Context) {
85 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
86 MemoryBuffer::getFileOrSTDIN(Filename);
87 if (std::error_code EC = FileOrErr.getError()) {
88 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
89 "Could not open input file: " + EC.message());
93 return parseIR(FileOrErr.get()->getMemBufferRef(), Err, Context);
96 //===----------------------------------------------------------------------===//
98 //===----------------------------------------------------------------------===//
100 LLVMBool LLVMParseIRInContext(LLVMContextRef ContextRef,
101 LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
105 std::unique_ptr<MemoryBuffer> MB(unwrap(MemBuf));
107 wrap(parseIR(MB->getMemBufferRef(), Diag, *unwrap(ContextRef)).release());
112 raw_string_ostream os(buf);
114 Diag.print(nullptr, os, false);
117 *OutMessage = strdup(buf.c_str());