1 //===- Parser.cpp - Main dispatch module for the Parser library -----------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This library implements the functionality defined in llvm/AsmParser/Parser.h
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "llvm/AsmParser/Parser.h"
15 #include "LLParser.h"
16 #include "llvm/IR/Module.h"
17 #include "llvm/Support/MemoryBuffer.h"
18 #include "llvm/Support/SourceMgr.h"
19 #include "llvm/Support/raw_ostream.h"
20 #include <cstring>
21 #include <system_error>
22 using namespace llvm;
23
ParseAssembly(MemoryBuffer * F,Module * M,SMDiagnostic & Err,LLVMContext & Context)24 Module *llvm::ParseAssembly(MemoryBuffer *F,
25 Module *M,
26 SMDiagnostic &Err,
27 LLVMContext &Context) {
28 SourceMgr SM;
29 SM.AddNewSourceBuffer(F, SMLoc());
30
31 // If we are parsing into an existing module, do it.
32 if (M)
33 return LLParser(F, SM, Err, M).Run() ? nullptr : M;
34
35 // Otherwise create a new module.
36 std::unique_ptr<Module> M2(new Module(F->getBufferIdentifier(), Context));
37 if (LLParser(F, SM, Err, M2.get()).Run())
38 return nullptr;
39 return M2.release();
40 }
41
ParseAssemblyFile(const std::string & Filename,SMDiagnostic & Err,LLVMContext & Context)42 Module *llvm::ParseAssemblyFile(const std::string &Filename, SMDiagnostic &Err,
43 LLVMContext &Context) {
44 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
45 MemoryBuffer::getFileOrSTDIN(Filename);
46 if (std::error_code EC = FileOrErr.getError()) {
47 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
48 "Could not open input file: " + EC.message());
49 return nullptr;
50 }
51
52 return ParseAssembly(FileOrErr.get().release(), nullptr, Err, Context);
53 }
54
ParseAssemblyString(const char * AsmString,Module * M,SMDiagnostic & Err,LLVMContext & Context)55 Module *llvm::ParseAssemblyString(const char *AsmString, Module *M,
56 SMDiagnostic &Err, LLVMContext &Context) {
57 MemoryBuffer *F =
58 MemoryBuffer::getMemBuffer(StringRef(AsmString), "<string>");
59
60 return ParseAssembly(F, M, Err, Context);
61 }
62