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toobj.cpp
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toobj.cpp
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//===-- toobj.cpp ---------------------------------------------------------===//
//
// LDC – the LLVM D compiler
//
// This file is distributed under the BSD-style LDC license. See the LICENSE
// file for details.
//
//===----------------------------------------------------------------------===//
#include "driver/toobj.h"
#include "driver/targetmachine.h"
#include "driver/tool.h"
#include "gen/irstate.h"
#include "gen/logger.h"
#include "gen/optimizer.h"
#include "gen/programs.h"
#if LDC_LLVM_VER >= 305
#include "llvm/IR/AssemblyAnnotationWriter.h"
#include "llvm/IR/Verifier.h"
#else
#include "llvm/Assembly/AssemblyAnnotationWriter.h"
#include "llvm/Analysis/Verifier.h"
#endif
#include "llvm/Bitcode/ReaderWriter.h"
#if LDC_LLVM_VER >= 307
#include "llvm/IR/LegacyPassManager.h"
#else
#include "llvm/PassManager.h"
#endif
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/Program.h"
#if LDC_LLVM_VER < 304
#include "llvm/Support/PathV1.h"
#endif
#if LDC_LLVM_VER >= 307
#include "llvm/Support/Path.h"
#endif
#include "llvm/Target/TargetMachine.h"
#if LDC_LLVM_VER >= 307
#include "llvm/Analysis/TargetTransformInfo.h"
#endif
#if LDC_LLVM_VER >= 306
#include "llvm/Target/TargetSubtargetInfo.h"
#endif
#if LDC_LLVM_VER >= 303
#include "llvm/IR/Module.h"
#else
#include "llvm/Module.h"
#endif
#include <cstddef>
#include <fstream>
#if LDC_LLVM_VER < 304
namespace llvm {
namespace sys {
namespace fs {
enum OpenFlags {
F_Excl = llvm::raw_fd_ostream::F_Excl,
F_Append = llvm::raw_fd_ostream::F_Append,
F_Binary = llvm::raw_fd_ostream::F_Binary
};
}
}
}
#endif
static llvm::cl::opt<bool>
NoIntegratedAssembler("no-integrated-as", llvm::cl::Hidden,
llvm::cl::desc("Disable integrated assembler"));
// based on llc code, University of Illinois Open Source License
static void codegenModule(llvm::TargetMachine &Target, llvm::Module& m,
llvm::raw_fd_ostream& out, llvm::TargetMachine::CodeGenFileType fileType)
{
using namespace llvm;
// Create a PassManager to hold and optimize the collection of passes we are
// about to build.
#if LDC_LLVM_VER >= 307
legacy::
#endif
PassManager Passes;
#if LDC_LLVM_VER >= 307
// The DataLayout is already set at the module (in module.cpp,
// method Module::genLLVMModule())
// FIXME: Introduce new command line switch default-data-layout to
// override the module data layout
#elif LDC_LLVM_VER == 306
Passes.add(new DataLayoutPass());
#elif LDC_LLVM_VER == 305
if (const DataLayout *DL = Target.getDataLayout())
Passes.add(new DataLayoutPass(*DL));
else
Passes.add(new DataLayoutPass(&m));
#elif LDC_LLVM_VER >= 302
if (const DataLayout *DL = Target.getDataLayout())
Passes.add(new DataLayout(*DL));
else
Passes.add(new DataLayout(&m));
#else
if (const TargetData *TD = Target.getTargetData())
Passes.add(new TargetData(*TD));
else
Passes.add(new TargetData(&m));
#endif
#if LDC_LLVM_VER >= 307
// Add internal analysis passes from the target machine.
Passes.add(createTargetTransformInfoWrapperPass(Target.getTargetIRAnalysis()));
#elif LDC_LLVM_VER >= 303
Target.addAnalysisPasses(Passes);
#endif
#if LDC_LLVM_VER < 307
llvm::formatted_raw_ostream fout(out);
#endif
if (Target.addPassesToEmitFile(Passes,
#if LDC_LLVM_VER >= 307
out,
#else
fout,
#endif
fileType, codeGenOptLevel()))
llvm_unreachable("no support for asm output");
Passes.run(m);
}
static void assemble(const std::string &asmpath, const std::string &objpath)
{
std::vector<std::string> args;
args.push_back("-O3");
args.push_back("-c");
args.push_back("-xassembler");
args.push_back(asmpath);
args.push_back("-o");
args.push_back(objpath);
// Only specify -m32/-m64 for architectures where the two variants actually
// exist (as e.g. the GCC ARM toolchain doesn't recognize the switches).
// MIPS does not have -m32/-m64 but requires -mabi=.
if (global.params.targetTriple.get64BitArchVariant().getArch() !=
llvm::Triple::UnknownArch &&
global.params.targetTriple.get32BitArchVariant().getArch() !=
llvm::Triple::UnknownArch) {
if (global.params.targetTriple.get64BitArchVariant().getArch() ==
llvm::Triple::mips64 ||
global.params.targetTriple.get64BitArchVariant().getArch() ==
llvm::Triple::mips64el) {
switch (getMipsABI())
{
case MipsABI::EABI:
args.push_back("-mabi=eabi");
args.push_back("-march=mips32r2");
break;
case MipsABI::O32:
args.push_back("-mabi=32");
args.push_back("-march=mips32r2");
break;
case MipsABI::N32:
args.push_back("-mabi=n32");
args.push_back("-march=mips64r2");
break;
case MipsABI::N64:
args.push_back("-mabi=64");
args.push_back("-march=mips64r2");
break;
case MipsABI::Unknown:
break;
}
}
else {
if (global.params.is64bit)
args.push_back("-m64");
else
args.push_back("-m32");
}
}
// Run the compiler to assembly the program.
std::string gcc(getGcc());
int R = executeToolAndWait(gcc, args, global.params.verbose);
if (R)
{
error(Loc(), "Error while invoking external assembler.");
fatal();
}
}
//////////////////////////////////////////////////////////////////////////////////////////
namespace
{
using namespace llvm;
static void printDebugLoc(const DebugLoc& debugLoc, formatted_raw_ostream& os)
{
os << debugLoc.getLine() << ":" << debugLoc.getCol();
#if LDC_LLVM_VER >= 307
if (DILocation *IDL = debugLoc.getInlinedAt())
{
os << "@";
printDebugLoc(IDL, os);
}
#else
if (MDNode *N = debugLoc.getInlinedAt(getGlobalContext()))
{
DebugLoc IDL = DebugLoc::getFromDILocation(N);
if (!IDL.isUnknown())
{
os << "@";
printDebugLoc(IDL, os);
}
}
#endif
}
class AssemblyAnnotator : public AssemblyAnnotationWriter
{
// Find the MDNode which corresponds to the DISubprogram data that described F.
#if LDC_LLVM_VER >= 307
static DISubprogram* FindSubprogram(const Function *F, DebugInfoFinder &Finder)
#else
static MDNode* FindSubprogram(const Function *F, DebugInfoFinder &Finder)
#endif
{
#if LDC_LLVM_VER >= 307
for (DISubprogram* Subprogram : Finder.subprograms())
if (Subprogram->describes(F)) return Subprogram;
return nullptr;
#elif LDC_LLVM_VER >= 305
for (DISubprogram Subprogram : Finder.subprograms())
if (Subprogram.describes(F)) return Subprogram;
return nullptr;
#else
for (DebugInfoFinder::iterator I = Finder.subprogram_begin(),
E = Finder.subprogram_end();
I != E; ++I) {
DISubprogram Subprogram(*I);
if (Subprogram.describes(F)) return Subprogram;
}
return 0;
#endif
}
static llvm::StringRef GetDisplayName(const Function *F)
{
llvm::DebugInfoFinder Finder;
#if LDC_LLVM_VER >= 303
Finder.processModule(*F->getParent());
#else
Finder.processModule(const_cast<llvm::Module&>(*F->getParent()));
#endif
#if LDC_LLVM_VER >= 307
if (DISubprogram* N = FindSubprogram(F, Finder))
#else
if (MDNode* N = FindSubprogram(F, Finder))
#endif
{
#if LDC_LLVM_VER >= 307
return N->getDisplayName();
#else
llvm::DISubprogram sub(N);
return sub.getDisplayName();
#endif
}
return "";
}
public:
void emitFunctionAnnot(const Function* F, formatted_raw_ostream& os) LLVM_OVERRIDE
{
os << "; [#uses = " << F->getNumUses() << ']';
// show demangled name
llvm::StringRef funcName = GetDisplayName(F);
if (!funcName.empty())
os << " [display name = " << funcName << ']';
os << '\n';
}
void printInfoComment(const Value& val, formatted_raw_ostream& os) LLVM_OVERRIDE
{
bool padding = false;
if (!val.getType()->isVoidTy())
{
os.PadToColumn(50);
padding = true;
os << "; [#uses = " << val.getNumUses() << " type = " << *val.getType() << ']';
}
const Instruction* instr = dyn_cast<Instruction>(&val);
if (!instr)
return;
#if LDC_LLVM_VER >= 307
if (const DebugLoc &debugLoc = instr->getDebugLoc())
#else
const DebugLoc& debugLoc = instr->getDebugLoc();
if (!debugLoc.isUnknown())
#endif
{
if (!padding)
{
os.PadToColumn(50);
padding = true;
os << ';';
}
os << " [debug line = ";
printDebugLoc(debugLoc, os);
os << ']';
}
if (const DbgDeclareInst* DDI = dyn_cast<DbgDeclareInst>(instr))
{
#if LDC_LLVM_VER >= 307
DILocalVariable* Var(DDI->getVariable());
#else
DIVariable Var(DDI->getVariable());
#endif
if (!padding)
{
os.PadToColumn(50);
os << ";";
}
#if LDC_LLVM_VER >= 307
os << " [debug variable = " << Var->getName() << ']';
#else
os << " [debug variable = " << Var.getName() << ']';
#endif
}
else if (const DbgValueInst* DVI = dyn_cast<DbgValueInst>(instr))
{
#if LDC_LLVM_VER >= 307
DILocalVariable* Var(DVI->getVariable());
#else
DIVariable Var(DVI->getVariable());
#endif
if (!padding)
{
os.PadToColumn(50);
os << ";";
}
#if LDC_LLVM_VER >= 307
os << " [debug variable = " << Var->getName() << ']';
#else
os << " [debug variable = " << Var.getName() << ']';
#endif
}
else if (const CallInst* callinstr = dyn_cast<CallInst>(instr))
{
const Function* F = callinstr->getCalledFunction();
if (!F)
return;
StringRef funcName = GetDisplayName(F);
if (!funcName.empty())
{
if (!padding)
{
os.PadToColumn(50);
os << ";";
}
os << " [display name = " << funcName << ']';
}
}
else if (const InvokeInst* invokeinstr = dyn_cast<InvokeInst>(instr))
{
const Function* F = invokeinstr->getCalledFunction();
if (!F)
return;
StringRef funcName = GetDisplayName(F);
if (!funcName.empty())
{
if (!padding)
{
os.PadToColumn(50);
os << ";";
}
os << " [display name = " << funcName << ']';
}
}
}
};
} // end of anonymous namespace
void writeModule(llvm::Module* m, std::string filename)
{
// run optimizer
ldc_optimize_module(m);
#if LDC_LLVM_VER >= 305
// There is no integrated assembler on AIX because XCOFF is not supported.
// Starting with LLVM 3.5 the integrated assembler can be used with MinGW.
bool const assembleExternally = global.params.output_o &&
(NoIntegratedAssembler ||
global.params.targetTriple.getOS() == llvm::Triple::AIX);
#else
// (We require LLVM 3.5 with AIX.)
// We don't use the integrated assembler with MinGW as it does not support
// emitting DW2 exception handling tables.
bool const assembleExternally = global.params.output_o &&
(NoIntegratedAssembler ||
global.params.targetTriple.getOS() == llvm::Triple::MinGW32);
#endif
// eventually do our own path stuff, dmd's is a bit strange.
typedef llvm::SmallString<128> LLPath;
// write LLVM bitcode
if (global.params.output_bc) {
LLPath bcpath = LLPath(filename);
llvm::sys::path::replace_extension(bcpath, global.bc_ext);
Logger::println("Writing LLVM bitcode to: %s\n", bcpath.c_str());
#if LDC_LLVM_VER >= 306
std::error_code errinfo;
#else
std::string errinfo;
#endif
llvm::raw_fd_ostream bos(bcpath.c_str(), errinfo,
#if LDC_LLVM_VER >= 305
llvm::sys::fs::F_None
#else
llvm::sys::fs::F_Binary
#endif
);
if (bos.has_error())
{
error(Loc(), "cannot write LLVM bitcode file '%s': %s", bcpath.c_str(),
#if LDC_LLVM_VER >= 306
errinfo
#else
errinfo.c_str()
#endif
);
fatal();
}
llvm::WriteBitcodeToFile(m, bos);
}
// write LLVM IR
if (global.params.output_ll) {
LLPath llpath = LLPath(filename);
llvm::sys::path::replace_extension(llpath, global.ll_ext);
Logger::println("Writing LLVM asm to: %s\n", llpath.c_str());
#if LDC_LLVM_VER >= 306
std::error_code errinfo;
#else
std::string errinfo;
#endif
llvm::raw_fd_ostream aos(llpath.c_str(), errinfo,
#if LDC_LLVM_VER >= 305
llvm::sys::fs::F_None
#else
llvm::sys::fs::F_Binary
#endif
);
if (aos.has_error())
{
error(Loc(), "cannot write LLVM asm file '%s': %s", llpath.c_str(),
#if LDC_LLVM_VER >= 306
errinfo
#else
errinfo.c_str()
#endif
);
fatal();
}
AssemblyAnnotator annotator;
m->print(aos, &annotator);
}
// write native assembly
if (global.params.output_s || assembleExternally) {
#if LDC_LLVM_VER >= 304
LLPath spath = LLPath(filename);
llvm::sys::path::replace_extension(spath, global.s_ext);
if (!global.params.output_s)
llvm::sys::fs::createUniqueFile("ldc-%%%%%%%.s", spath);
#else
// Pre-3.4 versions don't have a createUniqueFile overload that does
// not open the file.
llvm::sys::Path spath(filename);
spath.eraseSuffix();
spath.appendSuffix(std::string(global.s_ext));
if (!global.params.output_s)
spath.createTemporaryFileOnDisk();
#endif
Logger::println("Writing native asm to: %s\n", spath.c_str());
#if LDC_LLVM_VER >= 306
std::error_code errinfo;
#else
std::string errinfo;
#endif
{
llvm::raw_fd_ostream out(spath.c_str(), errinfo,
#if LDC_LLVM_VER >= 305
llvm::sys::fs::F_None
#else
llvm::sys::fs::F_Binary
#endif
);
#if LDC_LLVM_VER >= 306
if (!errinfo)
#else
if (errinfo.empty())
#endif
{
codegenModule(*gTargetMachine, *m, out, llvm::TargetMachine::CGFT_AssemblyFile);
}
else
{
error(Loc(), "cannot write native asm: %s",
#if LDC_LLVM_VER >= 306
errinfo
#else
errinfo.c_str()
#endif
);
fatal();
}
}
if (assembleExternally)
{
LLPath objpath(filename);
assemble(spath.str(), objpath.str());
}
if (!global.params.output_s)
{
#if LDC_LLVM_VER < 305
bool existed;
llvm::sys::fs::remove(spath.str(), existed);
#else
llvm::sys::fs::remove(spath.str());
#endif
}
}
if (global.params.output_o && !assembleExternally) {
LLPath objpath = LLPath(filename);
Logger::println("Writing object file to: %s\n", objpath.c_str());
#if LDC_LLVM_VER >= 306
std::error_code errinfo;
#else
std::string errinfo;
#endif
{
llvm::raw_fd_ostream out(objpath.c_str(), errinfo,
#if LDC_LLVM_VER >= 305
llvm::sys::fs::F_None
#else
llvm::sys::fs::F_Binary
#endif
);
#if LDC_LLVM_VER >= 306
if (!errinfo)
#else
if (errinfo.empty())
#endif
{
codegenModule(*gTargetMachine, *m, out, llvm::TargetMachine::CGFT_ObjectFile);
}
else
{
error(Loc(), "cannot write object file: %s",
#if LDC_LLVM_VER >= 306
errinfo
#else
errinfo.c_str()
#endif
);
fatal();
}
}
}
}