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https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206252 91177308-0d34-0410-b5e6-96231b3b80d8
124 lines
4.0 KiB
C++
124 lines
4.0 KiB
C++
//===---- IRReader.cpp - Reader for LLVM IR files -------------------------===//
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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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#include "llvm/IRReader/IRReader.h"
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#include "llvm-c/Core.h"
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#include "llvm-c/IRReader.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/Bitcode/ReaderWriter.h"
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#include "llvm/IR/LLVMContext.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/Timer.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/system_error.h"
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using namespace llvm;
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namespace llvm {
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extern bool TimePassesIsEnabled;
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}
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static const char *const TimeIRParsingGroupName = "LLVM IR Parsing";
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static const char *const TimeIRParsingName = "Parse IR";
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Module *llvm::getLazyIRModule(MemoryBuffer *Buffer, SMDiagnostic &Err,
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LLVMContext &Context) {
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if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
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(const unsigned char *)Buffer->getBufferEnd())) {
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std::string ErrMsg;
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ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer, Context);
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if (error_code EC = ModuleOrErr.getError()) {
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Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
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EC.message());
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// ParseBitcodeFile does not take ownership of the Buffer in the
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// case of an error.
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delete Buffer;
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return nullptr;
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}
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return ModuleOrErr.get();
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}
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return ParseAssembly(Buffer, nullptr, Err, Context);
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}
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Module *llvm::getLazyIRFileModule(const std::string &Filename, SMDiagnostic &Err,
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LLVMContext &Context) {
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std::unique_ptr<MemoryBuffer> File;
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if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, File)) {
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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 getLazyIRModule(File.release(), Err, Context);
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}
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Module *llvm::ParseIR(MemoryBuffer *Buffer, SMDiagnostic &Err,
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LLVMContext &Context) {
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NamedRegionTimer T(TimeIRParsingName, TimeIRParsingGroupName,
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TimePassesIsEnabled);
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if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
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(const unsigned char *)Buffer->getBufferEnd())) {
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ErrorOr<Module *> ModuleOrErr = parseBitcodeFile(Buffer, Context);
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Module *M = nullptr;
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if (error_code EC = ModuleOrErr.getError())
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Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
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EC.message());
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else
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M = ModuleOrErr.get();
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// parseBitcodeFile does not take ownership of the Buffer.
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delete Buffer;
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return M;
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}
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return ParseAssembly(Buffer, nullptr, Err, Context);
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}
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Module *llvm::ParseIRFile(const std::string &Filename, SMDiagnostic &Err,
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LLVMContext &Context) {
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std::unique_ptr<MemoryBuffer> File;
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if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, File)) {
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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 ParseIR(File.release(), Err, Context);
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}
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//===----------------------------------------------------------------------===//
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// C API.
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//===----------------------------------------------------------------------===//
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LLVMBool LLVMParseIRInContext(LLVMContextRef ContextRef,
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LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
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char **OutMessage) {
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SMDiagnostic Diag;
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*OutM = wrap(ParseIR(unwrap(MemBuf), Diag, *unwrap(ContextRef)));
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if(!*OutM) {
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if (OutMessage) {
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std::string buf;
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raw_string_ostream os(buf);
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Diag.print(nullptr, os, false);
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os.flush();
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*OutMessage = strdup(buf.c_str());
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}
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return 1;
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}
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return 0;
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}
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