110 lines
4.0 KiB
C++
110 lines
4.0 KiB
C++
//===- Parser.cpp - Main dispatch module for the Parser library -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This library implements the functionality defined in llvm/AsmParser/Parser.h
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/AsmParser/Parser.h"
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#include "LLParser.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstring>
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#include <system_error>
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using namespace llvm;
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bool llvm::parseAssemblyInto(MemoryBufferRef F, Module &M, SMDiagnostic &Err,
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SlotMapping *Slots) {
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SourceMgr SM;
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std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(F);
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SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
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return LLParser(F.getBuffer(), SM, Err, &M, Slots).Run();
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}
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std::unique_ptr<Module> llvm::parseAssembly(MemoryBufferRef F,
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SMDiagnostic &Err,
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LLVMContext &Context,
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SlotMapping *Slots) {
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std::unique_ptr<Module> M =
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make_unique<Module>(F.getBufferIdentifier(), Context);
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if (parseAssemblyInto(F, *M, Err, Slots))
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return nullptr;
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return M;
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}
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std::unique_ptr<Module> llvm::parseAssemblyFile(StringRef Filename,
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SMDiagnostic &Err,
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LLVMContext &Context,
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SlotMapping *Slots) {
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ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
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MemoryBuffer::getFileOrSTDIN(Filename);
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if (std::error_code EC = FileOrErr.getError()) {
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Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
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"Could not open input file: " + EC.message());
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return nullptr;
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}
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return parseAssembly(FileOrErr.get()->getMemBufferRef(), Err, Context, Slots);
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}
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std::unique_ptr<Module> llvm::parseAssemblyString(StringRef AsmString,
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SMDiagnostic &Err,
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LLVMContext &Context,
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SlotMapping *Slots) {
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MemoryBufferRef F(AsmString, "<string>");
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return parseAssembly(F, Err, Context, Slots);
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}
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Constant *llvm::parseConstantValue(StringRef Asm, SMDiagnostic &Err,
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const Module &M, const SlotMapping *Slots) {
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SourceMgr SM;
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std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Asm);
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SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
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Constant *C;
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if (LLParser(Asm, SM, Err, const_cast<Module *>(&M))
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.parseStandaloneConstantValue(C, Slots))
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return nullptr;
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return C;
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}
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Type *llvm::parseType(StringRef Asm, SMDiagnostic &Err, const Module &M,
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const SlotMapping *Slots) {
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unsigned Read;
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Type *Ty = parseTypeAtBeginning(Asm, Read, Err, M, Slots);
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if (!Ty)
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return nullptr;
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if (Read != Asm.size()) {
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SourceMgr SM;
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std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Asm);
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SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
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Err = SM.GetMessage(SMLoc::getFromPointer(Asm.begin() + Read),
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SourceMgr::DK_Error, "expected end of string");
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return nullptr;
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}
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return Ty;
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}
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Type *llvm::parseTypeAtBeginning(StringRef Asm, unsigned &Read,
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SMDiagnostic &Err, const Module &M,
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const SlotMapping *Slots) {
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SourceMgr SM;
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std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Asm);
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SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
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Type *Ty;
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if (LLParser(Asm, SM, Err, const_cast<Module *>(&M))
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.parseTypeAtBeginning(Ty, Read, Slots))
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return nullptr;
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return Ty;
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}
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