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//===-- TargetMachine.cpp -------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the LLVM-C part of TargetMachine.h
//
//===----------------------------------------------------------------------===//
#include "llvm-c/Core.h"
#include "llvm-c/TargetMachine.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Module.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/CodeGenCWrappers.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/TargetParser/Host.h"
#include "llvm/TargetParser/SubtargetFeature.h"
#include <cstring>
#include <optional>
using namespace llvm;
static TargetMachine *unwrap(LLVMTargetMachineRef P) {
return reinterpret_cast<TargetMachine *>(P);
}
static Target *unwrap(LLVMTargetRef P) {
return reinterpret_cast<Target*>(P);
}
static LLVMTargetMachineRef wrap(const TargetMachine *P) {
return reinterpret_cast<LLVMTargetMachineRef>(const_cast<TargetMachine *>(P));
}
static LLVMTargetRef wrap(const Target * P) {
return reinterpret_cast<LLVMTargetRef>(const_cast<Target*>(P));
}
LLVMTargetRef LLVMGetFirstTarget() {
if (TargetRegistry::targets().begin() == TargetRegistry::targets().end()) {
return nullptr;
}
const Target *target = &*TargetRegistry::targets().begin();
return wrap(target);
}
LLVMTargetRef LLVMGetNextTarget(LLVMTargetRef T) {
return wrap(unwrap(T)->getNext());
}
LLVMTargetRef LLVMGetTargetFromName(const char *Name) {
StringRef NameRef = Name;
auto I = find_if(TargetRegistry::targets(),
[&](const Target &T) { return T.getName() == NameRef; });
return I != TargetRegistry::targets().end() ? wrap(&*I) : nullptr;
}
LLVMBool LLVMGetTargetFromTriple(const char* TripleStr, LLVMTargetRef *T,
char **ErrorMessage) {
std::string Error;
*T = wrap(TargetRegistry::lookupTarget(TripleStr, Error));
if (!*T) {
if (ErrorMessage)
*ErrorMessage = strdup(Error.c_str());
return 1;
}
return 0;
}
const char * LLVMGetTargetName(LLVMTargetRef T) {
return unwrap(T)->getName();
}
const char * LLVMGetTargetDescription(LLVMTargetRef T) {
return unwrap(T)->getShortDescription();
}
LLVMBool LLVMTargetHasJIT(LLVMTargetRef T) {
return unwrap(T)->hasJIT();
}
LLVMBool LLVMTargetHasTargetMachine(LLVMTargetRef T) {
return unwrap(T)->hasTargetMachine();
}
LLVMBool LLVMTargetHasAsmBackend(LLVMTargetRef T) {
return unwrap(T)->hasMCAsmBackend();
}
LLVMTargetMachineRef LLVMCreateTargetMachine(LLVMTargetRef T,
const char *Triple, const char *CPU, const char *Features,
LLVMCodeGenOptLevel Level, LLVMRelocMode Reloc,
LLVMCodeModel CodeModel) {
std::optional<Reloc::Model> RM;
switch (Reloc){
case LLVMRelocStatic:
RM = Reloc::Static;
break;
case LLVMRelocPIC:
RM = Reloc::PIC_;
break;
case LLVMRelocDynamicNoPic:
RM = Reloc::DynamicNoPIC;
break;
case LLVMRelocROPI:
RM = Reloc::ROPI;
break;
case LLVMRelocRWPI:
RM = Reloc::RWPI;
break;
case LLVMRelocROPI_RWPI:
RM = Reloc::ROPI_RWPI;
break;
default:
break;
}
bool JIT;
std::optional<CodeModel::Model> CM = unwrap(CodeModel, JIT);
CodeGenOptLevel OL;
switch (Level) {
case LLVMCodeGenLevelNone:
OL = CodeGenOptLevel::None;
break;
case LLVMCodeGenLevelLess:
OL = CodeGenOptLevel::Less;
break;
case LLVMCodeGenLevelAggressive:
OL = CodeGenOptLevel::Aggressive;
break;
default:
OL = CodeGenOptLevel::Default;
break;
}
TargetOptions opt;
return wrap(unwrap(T)->createTargetMachine(Triple, CPU, Features, opt, RM, CM,
OL, JIT));
}
void LLVMDisposeTargetMachine(LLVMTargetMachineRef T) { delete unwrap(T); }
LLVMTargetRef LLVMGetTargetMachineTarget(LLVMTargetMachineRef T) {
const Target* target = &(unwrap(T)->getTarget());
return wrap(target);
}
char* LLVMGetTargetMachineTriple(LLVMTargetMachineRef T) {
std::string StringRep = unwrap(T)->getTargetTriple().str();
return strdup(StringRep.c_str());
}
char* LLVMGetTargetMachineCPU(LLVMTargetMachineRef T) {
std::string StringRep = std::string(unwrap(T)->getTargetCPU());
return strdup(StringRep.c_str());
}
char* LLVMGetTargetMachineFeatureString(LLVMTargetMachineRef T) {
std::string StringRep = std::string(unwrap(T)->getTargetFeatureString());
return strdup(StringRep.c_str());
}
void LLVMSetTargetMachineAsmVerbosity(LLVMTargetMachineRef T,
LLVMBool VerboseAsm) {
unwrap(T)->Options.MCOptions.AsmVerbose = VerboseAsm;
}
LLVMTargetDataRef LLVMCreateTargetDataLayout(LLVMTargetMachineRef T) {
return wrap(new DataLayout(unwrap(T)->createDataLayout()));
}
static LLVMBool LLVMTargetMachineEmit(LLVMTargetMachineRef T, LLVMModuleRef M,
raw_pwrite_stream &OS,
LLVMCodeGenFileType codegen,
char **ErrorMessage) {
TargetMachine* TM = unwrap(T);
Module* Mod = unwrap(M);
legacy::PassManager pass;
std::string error;
Mod->setDataLayout(TM->createDataLayout());
CodeGenFileType ft;
switch (codegen) {
case LLVMAssemblyFile:
ft = CodeGenFileType::AssemblyFile;
break;
default:
ft = CodeGenFileType::ObjectFile;
break;
}
if (TM->addPassesToEmitFile(pass, OS, nullptr, ft)) {
error = "TargetMachine can't emit a file of this type";
*ErrorMessage = strdup(error.c_str());
return true;
}
pass.run(*Mod);
OS.flush();
return false;
}
LLVMBool LLVMTargetMachineEmitToFile(LLVMTargetMachineRef T, LLVMModuleRef M,
const char *Filename,
LLVMCodeGenFileType codegen,
char **ErrorMessage) {
std::error_code EC;
raw_fd_ostream dest(Filename, EC, sys::fs::OF_None);
if (EC) {
*ErrorMessage = strdup(EC.message().c_str());
return true;
}
bool Result = LLVMTargetMachineEmit(T, M, dest, codegen, ErrorMessage);
dest.flush();
return Result;
}
LLVMBool LLVMTargetMachineEmitToMemoryBuffer(LLVMTargetMachineRef T,
LLVMModuleRef M, LLVMCodeGenFileType codegen, char** ErrorMessage,
LLVMMemoryBufferRef *OutMemBuf) {
SmallString<0> CodeString;
raw_svector_ostream OStream(CodeString);
bool Result = LLVMTargetMachineEmit(T, M, OStream, codegen, ErrorMessage);
StringRef Data = OStream.str();
*OutMemBuf =
LLVMCreateMemoryBufferWithMemoryRangeCopy(Data.data(), Data.size(), "");
return Result;
}
char *LLVMGetDefaultTargetTriple(void) {
return strdup(sys::getDefaultTargetTriple().c_str());
}
char *LLVMNormalizeTargetTriple(const char* triple) {
return strdup(Triple::normalize(StringRef(triple)).c_str());
}
char *LLVMGetHostCPUName(void) {
return strdup(sys::getHostCPUName().data());
}
char *LLVMGetHostCPUFeatures(void) {
SubtargetFeatures Features;
StringMap<bool> HostFeatures;
if (sys::getHostCPUFeatures(HostFeatures))
for (const auto &[Feature, IsEnabled] : HostFeatures)
Features.AddFeature(Feature, IsEnabled);
return strdup(Features.getString().c_str());
}
void LLVMAddAnalysisPasses(LLVMTargetMachineRef T, LLVMPassManagerRef PM) {
unwrap(PM)->add(
createTargetTransformInfoWrapperPass(unwrap(T)->getTargetIRAnalysis()));
}