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//===- RustWrapper.cpp - Rust wrapper for core functions --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines alternate interfaces to core functions that are more
// readily callable by Rust's FFI.
//
//===----------------------------------------------------------------------===//
#include "llvm/Linker.h"
#include "llvm/PassManager.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetSelect.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm-c/Core.h"
#include "llvm-c/Object.h"
#include <cstdlib>
using namespace llvm;
static const char *LLVMRustError;
extern "C" LLVMMemoryBufferRef
LLVMRustCreateMemoryBufferWithContentsOfFile(const char *Path) {
LLVMMemoryBufferRef MemBuf = NULL;
LLVMCreateMemoryBufferWithContentsOfFile(Path, &MemBuf,
const_cast<char **>(&LLVMRustError));
return MemBuf;
}
extern "C" const char *LLVMRustGetLastError(void) {
return LLVMRustError;
}
extern "C" void LLVMAddBasicAliasAnalysisPass(LLVMPassManagerRef PM);
void (*RustHackToFetchPassesO)(LLVMPassManagerRef PM) =
LLVMAddBasicAliasAnalysisPass;
enum LLVMCodeGenFileType {
LLVMAssemblyFile,
LLVMObjectFile,
LLVMNullFile // Do not emit any output.
};
extern "C" bool LLVMLinkModules(LLVMModuleRef Dest, LLVMModuleRef Src) {
static std::string err;
// For some strange reason, unwrap() doesn't work here. "No matching
// function" error.
Module *DM = reinterpret_cast<Module *>(Dest);
Module *SM = reinterpret_cast<Module *>(Src);
if (Linker::LinkModules(DM, SM, &err)) {
LLVMRustError = err.c_str();
return false;
}
return true;
}
extern "C" void LLVMRustWriteOutputFile(LLVMPassManagerRef PMR,
LLVMModuleRef M,
const char *triple,
const char *path,
LLVMCodeGenFileType FileType) {
// Set compilation options.
llvm::UnwindTablesMandatory = true;
llvm::NoFramePointerElim = true;
InitializeAllTargets();
InitializeAllAsmPrinters();
InitializeAllAsmParsers();
TargetMachine::setRelocationModel(Reloc::PIC_);
std::string Err;
const Target *TheTarget = TargetRegistry::lookupTarget(triple, Err);
std::string FeaturesStr;
TargetMachine &Target = *TheTarget->createTargetMachine(triple, FeaturesStr);
bool NoVerify = false;
CodeGenOpt::Level OLvl = CodeGenOpt::Default;
PassManager *PM = unwrap<PassManager>(PMR);
std::string ErrorInfo;
raw_fd_ostream OS(path, ErrorInfo,
raw_fd_ostream::F_Binary);
formatted_raw_ostream FOS(OS);
TargetMachine::CodeGenFileType FileType2 =
static_cast<TargetMachine::CodeGenFileType>(FileType);
bool foo = Target.addPassesToEmitFile(*PM, FOS, FileType2, OLvl, NoVerify);
assert(!foo);
(void)foo;
PM->run(*unwrap(M));
}
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