mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 20:29:48 +00:00
61fc8d670f
Function attributes are the future! So just query whether we want to realign the stack directly from the function instead of through a random target options structure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187618 91177308-0d34-0410-b5e6-96231b3b80d8
384 lines
12 KiB
C++
384 lines
12 KiB
C++
//===-- llc.cpp - Implement the LLVM Native Code Generator ----------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This is the llc code generator driver. It provides a convenient
|
|
// command-line interface for generating native assembly-language code
|
|
// or C code, given LLVM bitcode.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/ADT/Triple.h"
|
|
#include "llvm/Assembly/PrintModulePass.h"
|
|
#include "llvm/CodeGen/CommandFlags.h"
|
|
#include "llvm/CodeGen/LinkAllAsmWriterComponents.h"
|
|
#include "llvm/CodeGen/LinkAllCodegenComponents.h"
|
|
#include "llvm/IR/DataLayout.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/IRReader/IRReader.h"
|
|
#include "llvm/MC/SubtargetFeature.h"
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/PassManager.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
#include "llvm/Support/Host.h"
|
|
#include "llvm/Support/ManagedStatic.h"
|
|
#include "llvm/Support/PluginLoader.h"
|
|
#include "llvm/Support/PrettyStackTrace.h"
|
|
#include "llvm/Support/Signals.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "llvm/Support/TargetRegistry.h"
|
|
#include "llvm/Support/TargetSelect.h"
|
|
#include "llvm/Support/ToolOutputFile.h"
|
|
#include "llvm/Target/TargetLibraryInfo.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include <memory>
|
|
using namespace llvm;
|
|
|
|
// General options for llc. Other pass-specific options are specified
|
|
// within the corresponding llc passes, and target-specific options
|
|
// and back-end code generation options are specified with the target machine.
|
|
//
|
|
static cl::opt<std::string>
|
|
InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
|
|
|
|
static cl::opt<std::string>
|
|
OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"));
|
|
|
|
static cl::opt<unsigned>
|
|
TimeCompilations("time-compilations", cl::Hidden, cl::init(1u),
|
|
cl::value_desc("N"),
|
|
cl::desc("Repeat compilation N times for timing"));
|
|
|
|
// Determine optimization level.
|
|
static cl::opt<char>
|
|
OptLevel("O",
|
|
cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
|
|
"(default = '-O2')"),
|
|
cl::Prefix,
|
|
cl::ZeroOrMore,
|
|
cl::init(' '));
|
|
|
|
static cl::opt<std::string>
|
|
TargetTriple("mtriple", cl::desc("Override target triple for module"));
|
|
|
|
cl::opt<bool> NoVerify("disable-verify", cl::Hidden,
|
|
cl::desc("Do not verify input module"));
|
|
|
|
cl::opt<bool>
|
|
DisableSimplifyLibCalls("disable-simplify-libcalls",
|
|
cl::desc("Disable simplify-libcalls"),
|
|
cl::init(false));
|
|
|
|
static int compileModule(char**, LLVMContext&);
|
|
|
|
// GetFileNameRoot - Helper function to get the basename of a filename.
|
|
static inline std::string
|
|
GetFileNameRoot(const std::string &InputFilename) {
|
|
std::string IFN = InputFilename;
|
|
std::string outputFilename;
|
|
int Len = IFN.length();
|
|
if ((Len > 2) &&
|
|
IFN[Len-3] == '.' &&
|
|
((IFN[Len-2] == 'b' && IFN[Len-1] == 'c') ||
|
|
(IFN[Len-2] == 'l' && IFN[Len-1] == 'l'))) {
|
|
outputFilename = std::string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
|
|
} else {
|
|
outputFilename = IFN;
|
|
}
|
|
return outputFilename;
|
|
}
|
|
|
|
static tool_output_file *GetOutputStream(const char *TargetName,
|
|
Triple::OSType OS,
|
|
const char *ProgName) {
|
|
// If we don't yet have an output filename, make one.
|
|
if (OutputFilename.empty()) {
|
|
if (InputFilename == "-")
|
|
OutputFilename = "-";
|
|
else {
|
|
OutputFilename = GetFileNameRoot(InputFilename);
|
|
|
|
switch (FileType) {
|
|
case TargetMachine::CGFT_AssemblyFile:
|
|
if (TargetName[0] == 'c') {
|
|
if (TargetName[1] == 0)
|
|
OutputFilename += ".cbe.c";
|
|
else if (TargetName[1] == 'p' && TargetName[2] == 'p')
|
|
OutputFilename += ".cpp";
|
|
else
|
|
OutputFilename += ".s";
|
|
} else
|
|
OutputFilename += ".s";
|
|
break;
|
|
case TargetMachine::CGFT_ObjectFile:
|
|
if (OS == Triple::Win32)
|
|
OutputFilename += ".obj";
|
|
else
|
|
OutputFilename += ".o";
|
|
break;
|
|
case TargetMachine::CGFT_Null:
|
|
OutputFilename += ".null";
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Decide if we need "binary" output.
|
|
bool Binary = false;
|
|
switch (FileType) {
|
|
case TargetMachine::CGFT_AssemblyFile:
|
|
break;
|
|
case TargetMachine::CGFT_ObjectFile:
|
|
case TargetMachine::CGFT_Null:
|
|
Binary = true;
|
|
break;
|
|
}
|
|
|
|
// Open the file.
|
|
std::string error;
|
|
sys::fs::OpenFlags OpenFlags = sys::fs::F_None;
|
|
if (Binary)
|
|
OpenFlags |= sys::fs::F_Binary;
|
|
tool_output_file *FDOut = new tool_output_file(OutputFilename.c_str(), error,
|
|
OpenFlags);
|
|
if (!error.empty()) {
|
|
errs() << error << '\n';
|
|
delete FDOut;
|
|
return 0;
|
|
}
|
|
|
|
return FDOut;
|
|
}
|
|
|
|
// main - Entry point for the llc compiler.
|
|
//
|
|
int main(int argc, char **argv) {
|
|
sys::PrintStackTraceOnErrorSignal();
|
|
PrettyStackTraceProgram X(argc, argv);
|
|
|
|
// Enable debug stream buffering.
|
|
EnableDebugBuffering = true;
|
|
|
|
LLVMContext &Context = getGlobalContext();
|
|
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
|
|
|
|
// Initialize targets first, so that --version shows registered targets.
|
|
InitializeAllTargets();
|
|
InitializeAllTargetMCs();
|
|
InitializeAllAsmPrinters();
|
|
InitializeAllAsmParsers();
|
|
|
|
// Initialize codegen and IR passes used by llc so that the -print-after,
|
|
// -print-before, and -stop-after options work.
|
|
PassRegistry *Registry = PassRegistry::getPassRegistry();
|
|
initializeCore(*Registry);
|
|
initializeCodeGen(*Registry);
|
|
initializeLoopStrengthReducePass(*Registry);
|
|
initializeLowerIntrinsicsPass(*Registry);
|
|
initializeUnreachableBlockElimPass(*Registry);
|
|
|
|
// Register the target printer for --version.
|
|
cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
|
|
|
|
cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
|
|
|
|
// Compile the module TimeCompilations times to give better compile time
|
|
// metrics.
|
|
for (unsigned I = TimeCompilations; I; --I)
|
|
if (int RetVal = compileModule(argv, Context))
|
|
return RetVal;
|
|
return 0;
|
|
}
|
|
|
|
static int compileModule(char **argv, LLVMContext &Context) {
|
|
// Load the module to be compiled...
|
|
SMDiagnostic Err;
|
|
OwningPtr<Module> M;
|
|
Module *mod = 0;
|
|
Triple TheTriple;
|
|
|
|
bool SkipModule = MCPU == "help" ||
|
|
(!MAttrs.empty() && MAttrs.front() == "help");
|
|
|
|
// If user just wants to list available options, skip module loading
|
|
if (!SkipModule) {
|
|
M.reset(ParseIRFile(InputFilename, Err, Context));
|
|
mod = M.get();
|
|
if (mod == 0) {
|
|
Err.print(argv[0], errs());
|
|
return 1;
|
|
}
|
|
|
|
// If we are supposed to override the target triple, do so now.
|
|
if (!TargetTriple.empty())
|
|
mod->setTargetTriple(Triple::normalize(TargetTriple));
|
|
TheTriple = Triple(mod->getTargetTriple());
|
|
} else {
|
|
TheTriple = Triple(Triple::normalize(TargetTriple));
|
|
}
|
|
|
|
if (TheTriple.getTriple().empty())
|
|
TheTriple.setTriple(sys::getDefaultTargetTriple());
|
|
|
|
// Get the target specific parser.
|
|
std::string Error;
|
|
const Target *TheTarget = TargetRegistry::lookupTarget(MArch, TheTriple,
|
|
Error);
|
|
if (!TheTarget) {
|
|
errs() << argv[0] << ": " << Error;
|
|
return 1;
|
|
}
|
|
|
|
// Package up features to be passed to target/subtarget
|
|
std::string FeaturesStr;
|
|
if (MAttrs.size()) {
|
|
SubtargetFeatures Features;
|
|
for (unsigned i = 0; i != MAttrs.size(); ++i)
|
|
Features.AddFeature(MAttrs[i]);
|
|
FeaturesStr = Features.getString();
|
|
}
|
|
|
|
CodeGenOpt::Level OLvl = CodeGenOpt::Default;
|
|
switch (OptLevel) {
|
|
default:
|
|
errs() << argv[0] << ": invalid optimization level.\n";
|
|
return 1;
|
|
case ' ': break;
|
|
case '0': OLvl = CodeGenOpt::None; break;
|
|
case '1': OLvl = CodeGenOpt::Less; break;
|
|
case '2': OLvl = CodeGenOpt::Default; break;
|
|
case '3': OLvl = CodeGenOpt::Aggressive; break;
|
|
}
|
|
|
|
TargetOptions Options;
|
|
Options.LessPreciseFPMADOption = EnableFPMAD;
|
|
Options.NoFramePointerElim = DisableFPElim;
|
|
Options.AllowFPOpFusion = FuseFPOps;
|
|
Options.UnsafeFPMath = EnableUnsafeFPMath;
|
|
Options.NoInfsFPMath = EnableNoInfsFPMath;
|
|
Options.NoNaNsFPMath = EnableNoNaNsFPMath;
|
|
Options.HonorSignDependentRoundingFPMathOption =
|
|
EnableHonorSignDependentRoundingFPMath;
|
|
Options.UseSoftFloat = GenerateSoftFloatCalls;
|
|
if (FloatABIForCalls != FloatABI::Default)
|
|
Options.FloatABIType = FloatABIForCalls;
|
|
Options.NoZerosInBSS = DontPlaceZerosInBSS;
|
|
Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
|
|
Options.DisableTailCalls = DisableTailCalls;
|
|
Options.StackAlignmentOverride = OverrideStackAlignment;
|
|
Options.TrapFuncName = TrapFuncName;
|
|
Options.PositionIndependentExecutable = EnablePIE;
|
|
Options.EnableSegmentedStacks = SegmentedStacks;
|
|
Options.UseInitArray = UseInitArray;
|
|
|
|
OwningPtr<TargetMachine>
|
|
target(TheTarget->createTargetMachine(TheTriple.getTriple(),
|
|
MCPU, FeaturesStr, Options,
|
|
RelocModel, CMModel, OLvl));
|
|
assert(target.get() && "Could not allocate target machine!");
|
|
assert(mod && "Should have exited after outputting help!");
|
|
TargetMachine &Target = *target.get();
|
|
|
|
if (DisableDotLoc)
|
|
Target.setMCUseLoc(false);
|
|
|
|
if (DisableCFI)
|
|
Target.setMCUseCFI(false);
|
|
|
|
if (EnableDwarfDirectory)
|
|
Target.setMCUseDwarfDirectory(true);
|
|
|
|
if (GenerateSoftFloatCalls)
|
|
FloatABIForCalls = FloatABI::Soft;
|
|
|
|
// Disable .loc support for older OS X versions.
|
|
if (TheTriple.isMacOSX() &&
|
|
TheTriple.isMacOSXVersionLT(10, 6))
|
|
Target.setMCUseLoc(false);
|
|
|
|
// Figure out where we are going to send the output.
|
|
OwningPtr<tool_output_file> Out
|
|
(GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]));
|
|
if (!Out) return 1;
|
|
|
|
// Build up all of the passes that we want to do to the module.
|
|
PassManager PM;
|
|
|
|
// Add an appropriate TargetLibraryInfo pass for the module's triple.
|
|
TargetLibraryInfo *TLI = new TargetLibraryInfo(TheTriple);
|
|
if (DisableSimplifyLibCalls)
|
|
TLI->disableAllFunctions();
|
|
PM.add(TLI);
|
|
|
|
// Add intenal analysis passes from the target machine.
|
|
Target.addAnalysisPasses(PM);
|
|
|
|
// Add the target data from the target machine, if it exists, or the module.
|
|
if (const DataLayout *TD = Target.getDataLayout())
|
|
PM.add(new DataLayout(*TD));
|
|
else
|
|
PM.add(new DataLayout(mod));
|
|
|
|
// Override default to generate verbose assembly.
|
|
Target.setAsmVerbosityDefault(true);
|
|
|
|
if (RelaxAll) {
|
|
if (FileType != TargetMachine::CGFT_ObjectFile)
|
|
errs() << argv[0]
|
|
<< ": warning: ignoring -mc-relax-all because filetype != obj";
|
|
else
|
|
Target.setMCRelaxAll(true);
|
|
}
|
|
|
|
{
|
|
formatted_raw_ostream FOS(Out->os());
|
|
|
|
AnalysisID StartAfterID = 0;
|
|
AnalysisID StopAfterID = 0;
|
|
const PassRegistry *PR = PassRegistry::getPassRegistry();
|
|
if (!StartAfter.empty()) {
|
|
const PassInfo *PI = PR->getPassInfo(StartAfter);
|
|
if (!PI) {
|
|
errs() << argv[0] << ": start-after pass is not registered.\n";
|
|
return 1;
|
|
}
|
|
StartAfterID = PI->getTypeInfo();
|
|
}
|
|
if (!StopAfter.empty()) {
|
|
const PassInfo *PI = PR->getPassInfo(StopAfter);
|
|
if (!PI) {
|
|
errs() << argv[0] << ": stop-after pass is not registered.\n";
|
|
return 1;
|
|
}
|
|
StopAfterID = PI->getTypeInfo();
|
|
}
|
|
|
|
// Ask the target to add backend passes as necessary.
|
|
if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify,
|
|
StartAfterID, StopAfterID)) {
|
|
errs() << argv[0] << ": target does not support generation of this"
|
|
<< " file type!\n";
|
|
return 1;
|
|
}
|
|
|
|
// Before executing passes, print the final values of the LLVM options.
|
|
cl::PrintOptionValues();
|
|
|
|
PM.run(*mod);
|
|
}
|
|
|
|
// Declare success.
|
|
Out->keep();
|
|
|
|
return 0;
|
|
}
|