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45d7960509
Without actually parsing a type it is difficult to perdict where the type definition ends. In other words, instead of expecting the user of the parser API to hand over only the relevant bits of the string being parsed, take the whole string, parse the type, and get back the number of characters that have been read. This will be used by the MIR testing infrastructure. llvm-svn: 262884
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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