1 //===---- IRReader.cpp - Reader for LLVM IR files -------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "llvm/IRReader/IRReader.h"
10 #include "llvm-c/IRReader.h"
11 #include "llvm/AsmParser/Parser.h"
12 #include "llvm/Bitcode/BitcodeReader.h"
13 #include "llvm/IR/LLVMContext.h"
14 #include "llvm/IR/Module.h"
15 #include "llvm/Support/MemoryBuffer.h"
16 #include "llvm/Support/SourceMgr.h"
17 #include "llvm/Support/Timer.h"
18 #include "llvm/Support/raw_ostream.h"
19 #include <system_error>
20
21 using namespace llvm;
22
23 namespace llvm {
24 extern bool TimePassesIsEnabled;
25 }
26
27 const char TimeIRParsingGroupName[] = "irparse";
28 const char TimeIRParsingGroupDescription[] = "LLVM IR Parsing";
29 const char TimeIRParsingName[] = "parse";
30 const char TimeIRParsingDescription[] = "Parse IR";
31
32 std::unique_ptr<Module>
getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer,SMDiagnostic & Err,LLVMContext & Context,bool ShouldLazyLoadMetadata)33 llvm::getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer, SMDiagnostic &Err,
34 LLVMContext &Context, bool ShouldLazyLoadMetadata) {
35 if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
36 (const unsigned char *)Buffer->getBufferEnd())) {
37 Expected<std::unique_ptr<Module>> ModuleOrErr = getOwningLazyBitcodeModule(
38 std::move(Buffer), Context, ShouldLazyLoadMetadata);
39 if (Error E = ModuleOrErr.takeError()) {
40 handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
41 Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
42 EIB.message());
43 });
44 return nullptr;
45 }
46 return std::move(ModuleOrErr.get());
47 }
48
49 return parseAssembly(Buffer->getMemBufferRef(), Err, Context);
50 }
51
getLazyIRFileModule(StringRef Filename,SMDiagnostic & Err,LLVMContext & Context,bool ShouldLazyLoadMetadata)52 std::unique_ptr<Module> llvm::getLazyIRFileModule(StringRef Filename,
53 SMDiagnostic &Err,
54 LLVMContext &Context,
55 bool ShouldLazyLoadMetadata) {
56 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
57 MemoryBuffer::getFileOrSTDIN(Filename);
58 if (std::error_code EC = FileOrErr.getError()) {
59 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
60 "Could not open input file: " + EC.message());
61 return nullptr;
62 }
63
64 return getLazyIRModule(std::move(FileOrErr.get()), Err, Context,
65 ShouldLazyLoadMetadata);
66 }
67
parseIR(MemoryBufferRef Buffer,SMDiagnostic & Err,LLVMContext & Context,DataLayoutCallbackTy DataLayoutCallback)68 std::unique_ptr<Module> llvm::parseIR(MemoryBufferRef Buffer, SMDiagnostic &Err,
69 LLVMContext &Context,
70 DataLayoutCallbackTy DataLayoutCallback) {
71 NamedRegionTimer T(TimeIRParsingName, TimeIRParsingDescription,
72 TimeIRParsingGroupName, TimeIRParsingGroupDescription,
73 TimePassesIsEnabled);
74 if (isBitcode((const unsigned char *)Buffer.getBufferStart(),
75 (const unsigned char *)Buffer.getBufferEnd())) {
76 Expected<std::unique_ptr<Module>> ModuleOrErr =
77 parseBitcodeFile(Buffer, Context, DataLayoutCallback);
78 if (Error E = ModuleOrErr.takeError()) {
79 handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
80 Err = SMDiagnostic(Buffer.getBufferIdentifier(), SourceMgr::DK_Error,
81 EIB.message());
82 });
83 return nullptr;
84 }
85 return std::move(ModuleOrErr.get());
86 }
87
88 return parseAssembly(Buffer, Err, Context, nullptr, DataLayoutCallback);
89 }
90
91 std::unique_ptr<Module>
parseIRFile(StringRef Filename,SMDiagnostic & Err,LLVMContext & Context,DataLayoutCallbackTy DataLayoutCallback)92 llvm::parseIRFile(StringRef Filename, SMDiagnostic &Err, LLVMContext &Context,
93 DataLayoutCallbackTy DataLayoutCallback) {
94 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
95 MemoryBuffer::getFileOrSTDIN(Filename);
96 if (std::error_code EC = FileOrErr.getError()) {
97 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
98 "Could not open input file: " + EC.message());
99 return nullptr;
100 }
101
102 return parseIR(FileOrErr.get()->getMemBufferRef(), Err, Context,
103 DataLayoutCallback);
104 }
105
106 //===----------------------------------------------------------------------===//
107 // C API.
108 //===----------------------------------------------------------------------===//
109
LLVMParseIRInContext(LLVMContextRef ContextRef,LLVMMemoryBufferRef MemBuf,LLVMModuleRef * OutM,char ** OutMessage)110 LLVMBool LLVMParseIRInContext(LLVMContextRef ContextRef,
111 LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
112 char **OutMessage) {
113 SMDiagnostic Diag;
114
115 std::unique_ptr<MemoryBuffer> MB(unwrap(MemBuf));
116 *OutM =
117 wrap(parseIR(MB->getMemBufferRef(), Diag, *unwrap(ContextRef)).release());
118
119 if(!*OutM) {
120 if (OutMessage) {
121 std::string buf;
122 raw_string_ostream os(buf);
123
124 Diag.print(nullptr, os, false);
125 os.flush();
126
127 *OutMessage = strdup(buf.c_str());
128 }
129 return 1;
130 }
131
132 return 0;
133 }
134