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//===-- HexagonTargetMachine.cpp - Define TargetMachine for Hexagon -------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Implements the info about Hexagon target spec.
//
//===----------------------------------------------------------------------===//
#include "HexagonTargetMachine.h"
#include "Hexagon.h"
#include "HexagonISelLowering.h"
#include "HexagonMachineScheduler.h"
#include "llvm/Module.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/PassManager.h"
#include "llvm/Transforms/IPO/PassManagerBuilder.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
static cl::
opt<bool> DisableHardwareLoops(
"disable-hexagon-hwloops", cl::Hidden,
cl::desc("Disable Hardware Loops for Hexagon target"));
static cl::
opt<bool> DisableHexagonMISched("disable-hexagon-misched",
cl::Hidden, cl::ZeroOrMore, cl::init(false),
cl::desc("Disable Hexagon MI Scheduling"));
/// HexagonTargetMachineModule - Note that this is used on hosts that
/// cannot link in a library unless there are references into the
/// library. In particular, it seems that it is not possible to get
/// things to work on Win32 without this. Though it is unused, do not
/// remove it.
extern "C" int HexagonTargetMachineModule;
int HexagonTargetMachineModule = 0;
extern "C" void LLVMInitializeHexagonTarget() {
// Register the target.
RegisterTargetMachine<HexagonTargetMachine> X(TheHexagonTarget);
}
static ScheduleDAGInstrs *createVLIWMachineSched(MachineSchedContext *C) {
return new VLIWMachineScheduler(C, new ConvergingVLIWScheduler());
}
static MachineSchedRegistry
SchedCustomRegistry("hexagon", "Run Hexagon's custom scheduler",
createVLIWMachineSched);
/// HexagonTargetMachine ctor - Create an ILP32 architecture model.
///
/// Hexagon_TODO: Do I need an aggregate alignment?
///
HexagonTargetMachine::HexagonTargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS,
const TargetOptions &Options,
Reloc::Model RM,
CodeModel::Model CM,
CodeGenOpt::Level OL)
: LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
DL("e-p:32:32:32-"
"i64:64:64-i32:32:32-i16:16:16-i1:32:32-"
"f64:64:64-f32:32:32-a0:0-n32") ,
Subtarget(TT, CPU, FS), InstrInfo(Subtarget), TLInfo(*this),
TSInfo(*this),
FrameLowering(Subtarget),
InstrItins(&Subtarget.getInstrItineraryData()),
STTI(&TLInfo), VTTI(&TLInfo) {
setMCUseCFI(false);
}
// addPassesForOptimizations - Allow the backend (target) to add Target
// Independent Optimization passes to the Pass Manager.
bool HexagonTargetMachine::addPassesForOptimizations(PassManagerBase &PM) {
PM.add(createConstantPropagationPass());
PM.add(createLoopSimplifyPass());
PM.add(createDeadCodeEliminationPass());
PM.add(createConstantPropagationPass());
PM.add(createLoopUnrollPass());
PM.add(createLoopStrengthReducePass());
return true;
}
namespace {
/// Hexagon Code Generator Pass Configuration Options.
class HexagonPassConfig : public TargetPassConfig {
public:
HexagonPassConfig(HexagonTargetMachine *TM, PassManagerBase &PM)
: TargetPassConfig(TM, PM) {
// Enable MI scheduler.
if (!DisableHexagonMISched) {
enablePass(&MachineSchedulerID);
MachineSchedRegistry::setDefault(createVLIWMachineSched);
}
}
HexagonTargetMachine &getHexagonTargetMachine() const {
return getTM<HexagonTargetMachine>();
}
virtual bool addInstSelector();
virtual bool addPreRegAlloc();
virtual bool addPostRegAlloc();
virtual bool addPreSched2();
virtual bool addPreEmitPass();
};
} // namespace
TargetPassConfig *HexagonTargetMachine::createPassConfig(PassManagerBase &PM) {
return new HexagonPassConfig(this, PM);
}
bool HexagonPassConfig::addInstSelector() {
addPass(createHexagonRemoveExtendOps(getHexagonTargetMachine()));
addPass(createHexagonISelDag(getHexagonTargetMachine()));
addPass(createHexagonPeephole());
return false;
}
bool HexagonPassConfig::addPreRegAlloc() {
if (!DisableHardwareLoops) {
addPass(createHexagonHardwareLoops());
}
return false;
}
bool HexagonPassConfig::addPostRegAlloc() {
addPass(createHexagonCFGOptimizer(getHexagonTargetMachine()));
return true;
}
bool HexagonPassConfig::addPreSched2() {
addPass(&IfConverterID);
return true;
}
bool HexagonPassConfig::addPreEmitPass() {
if (!DisableHardwareLoops) {
addPass(createHexagonFixupHwLoops());
}
addPass(createHexagonNewValueJump());
// Expand Spill code for predicate registers.
addPass(createHexagonExpandPredSpillCode(getHexagonTargetMachine()));
// Split up TFRcondsets into conditional transfers.
addPass(createHexagonSplitTFRCondSets(getHexagonTargetMachine()));
// Create Packets.
addPass(createHexagonPacketizer());
return false;
}
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