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/ADT/STLExtras.h"
17 #include "llvm/IR/Module.h"
18 #include "llvm/Support/MemoryBuffer.h"
19 #include "llvm/Support/SourceMgr.h"
20 #include "llvm/Support/raw_ostream.h"
21 #include <cstring>
22 #include <system_error>
23 using namespace llvm;
24
parseAssemblyInto(MemoryBufferRef F,Module & M,SMDiagnostic & Err,SlotMapping * Slots)25 bool llvm::parseAssemblyInto(MemoryBufferRef F, Module &M, SMDiagnostic &Err,
26 SlotMapping *Slots) {
27 SourceMgr SM;
28 std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(F);
29 SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
30
31 return LLParser(F.getBuffer(), SM, Err, &M, Slots).Run();
32 }
33
parseAssembly(MemoryBufferRef F,SMDiagnostic & Err,LLVMContext & Context,SlotMapping * Slots)34 std::unique_ptr<Module> llvm::parseAssembly(MemoryBufferRef F,
35 SMDiagnostic &Err,
36 LLVMContext &Context,
37 SlotMapping *Slots) {
38 std::unique_ptr<Module> M =
39 make_unique<Module>(F.getBufferIdentifier(), Context);
40
41 if (parseAssemblyInto(F, *M, Err, Slots))
42 return nullptr;
43
44 return M;
45 }
46
parseAssemblyFile(StringRef Filename,SMDiagnostic & Err,LLVMContext & Context,SlotMapping * Slots)47 std::unique_ptr<Module> llvm::parseAssemblyFile(StringRef Filename,
48 SMDiagnostic &Err,
49 LLVMContext &Context,
50 SlotMapping *Slots) {
51 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
52 MemoryBuffer::getFileOrSTDIN(Filename);
53 if (std::error_code EC = FileOrErr.getError()) {
54 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
55 "Could not open input file: " + EC.message());
56 return nullptr;
57 }
58
59 return parseAssembly(FileOrErr.get()->getMemBufferRef(), Err, Context, Slots);
60 }
61
parseAssemblyString(StringRef AsmString,SMDiagnostic & Err,LLVMContext & Context,SlotMapping * Slots)62 std::unique_ptr<Module> llvm::parseAssemblyString(StringRef AsmString,
63 SMDiagnostic &Err,
64 LLVMContext &Context,
65 SlotMapping *Slots) {
66 MemoryBufferRef F(AsmString, "<string>");
67 return parseAssembly(F, Err, Context, Slots);
68 }
69
parseConstantValue(StringRef Asm,SMDiagnostic & Err,const Module & M,const SlotMapping * Slots)70 Constant *llvm::parseConstantValue(StringRef Asm, SMDiagnostic &Err,
71 const Module &M, const SlotMapping *Slots) {
72 SourceMgr SM;
73 std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Asm);
74 SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
75 Constant *C;
76 if (LLParser(Asm, SM, Err, const_cast<Module *>(&M))
77 .parseStandaloneConstantValue(C, Slots))
78 return nullptr;
79 return C;
80 }
81
parseType(StringRef Asm,SMDiagnostic & Err,const Module & M,const SlotMapping * Slots)82 Type *llvm::parseType(StringRef Asm, SMDiagnostic &Err, const Module &M,
83 const SlotMapping *Slots) {
84 unsigned Read;
85 Type *Ty = parseTypeAtBeginning(Asm, Read, Err, M, Slots);
86 if (!Ty)
87 return nullptr;
88 if (Read != Asm.size()) {
89 SourceMgr SM;
90 std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Asm);
91 SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
92 Err = SM.GetMessage(SMLoc::getFromPointer(Asm.begin() + Read),
93 SourceMgr::DK_Error, "expected end of string");
94 return nullptr;
95 }
96 return Ty;
97 }
parseTypeAtBeginning(StringRef Asm,unsigned & Read,SMDiagnostic & Err,const Module & M,const SlotMapping * Slots)98 Type *llvm::parseTypeAtBeginning(StringRef Asm, unsigned &Read,
99 SMDiagnostic &Err, const Module &M,
100 const SlotMapping *Slots) {
101 SourceMgr SM;
102 std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Asm);
103 SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
104 Type *Ty;
105 if (LLParser(Asm, SM, Err, const_cast<Module *>(&M))
106 .parseTypeAtBeginning(Ty, Read, Slots))
107 return nullptr;
108 return Ty;
109 }
110