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//===-- ARMTargetMachine.cpp - Define TargetMachine for ARM ---------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
#include "ARMTargetMachine.h"
#include "ARMMCAsmInfo.h"
#include "ARMFrameInfo.h"
#include "ARM.h"
#include "llvm/PassManager.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegistry.h"
using namespace llvm;
static cl::opt<bool>
EarlyITBlockFormation("thumb2-early-it-blocks", cl::Hidden,
cl::desc("Form IT blocks early before register allocation"),
cl::init(false));
static MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
Triple TheTriple(TT);
switch (TheTriple.getOS()) {
case Triple::Darwin:
return new ARMMCAsmInfoDarwin();
default:
return new ARMELFMCAsmInfo();
}
}
extern "C" void LLVMInitializeARMTarget() {
// Register the target.
RegisterTargetMachine<ARMTargetMachine> X(TheARMTarget);
RegisterTargetMachine<ThumbTargetMachine> Y(TheThumbTarget);
// Register the target asm info.
RegisterAsmInfoFn A(TheARMTarget, createMCAsmInfo);
RegisterAsmInfoFn B(TheThumbTarget, createMCAsmInfo);
}
/// TargetMachine ctor - Create an ARM architecture model.
///
ARMBaseTargetMachine::ARMBaseTargetMachine(const Target &T,
const std::string &TT,
const std::string &FS,
bool isThumb)
: LLVMTargetMachine(T, TT),
Subtarget(TT, FS, isThumb),
FrameInfo(Subtarget),
JITInfo(),
InstrItins(Subtarget.getInstrItineraryData()) {
DefRelocModel = getRelocationModel();
}
ARMTargetMachine::ARMTargetMachine(const Target &T, const std::string &TT,
const std::string &FS)
: ARMBaseTargetMachine(T, TT, FS, false), InstrInfo(Subtarget),
DataLayout(Subtarget.isAPCS_ABI() ?
std::string("e-p:32:32-f64:32:32-i64:32:32-n32") :
std::string("e-p:32:32-f64:64:64-i64:64:64-n32")),
TLInfo(*this),
TSInfo(*this) {
}
ThumbTargetMachine::ThumbTargetMachine(const Target &T, const std::string &TT,
const std::string &FS)
: ARMBaseTargetMachine(T, TT, FS, true),
InstrInfo(Subtarget.hasThumb2()
? ((ARMBaseInstrInfo*)new Thumb2InstrInfo(Subtarget))
: ((ARMBaseInstrInfo*)new Thumb1InstrInfo(Subtarget))),
DataLayout(Subtarget.isAPCS_ABI() ?
std::string("e-p:32:32-f64:32:32-i64:32:32-"
"i16:16:32-i8:8:32-i1:8:32-a:0:32-n32") :
std::string("e-p:32:32-f64:64:64-i64:64:64-"
"i16:16:32-i8:8:32-i1:8:32-a:0:32-n32")),
TLInfo(*this),
TSInfo(*this) {
}
// Pass Pipeline Configuration
bool ARMBaseTargetMachine::addInstSelector(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
PM.add(createARMISelDag(*this, OptLevel));
return false;
}
bool ARMBaseTargetMachine::addPreRegAlloc(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
if (Subtarget.hasNEON())
PM.add(createNEONPreAllocPass());
// FIXME: temporarily disabling load / store optimization pass for Thumb1.
if (OptLevel != CodeGenOpt::None && !Subtarget.isThumb1Only())
PM.add(createARMLoadStoreOptimizationPass(true));
if (OptLevel != CodeGenOpt::None && Subtarget.isThumb2() &&
EarlyITBlockFormation)
PM.add(createThumb2ITBlockPass(true));
return true;
}
bool ARMBaseTargetMachine::addPreSched2(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
// FIXME: temporarily disabling load / store optimization pass for Thumb1.
if (OptLevel != CodeGenOpt::None) {
if (!Subtarget.isThumb1Only())
PM.add(createARMLoadStoreOptimizationPass());
if (Subtarget.hasNEON())
PM.add(createNEONMoveFixPass());
}
// Expand some pseudo instructions into multiple instructions to allow
// proper scheduling.
PM.add(createARMExpandPseudoPass());
return true;
}
bool ARMBaseTargetMachine::addPreEmitPass(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
// FIXME: temporarily disabling load / store optimization pass for Thumb1.
if (OptLevel != CodeGenOpt::None) {
if (!Subtarget.isThumb1Only())
PM.add(createIfConverterPass());
}
if (Subtarget.isThumb2()) {
PM.add(createThumb2ITBlockPass());
PM.add(createThumb2SizeReductionPass());
}
PM.add(createARMConstantIslandPass());
return true;
}
bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
CodeGenOpt::Level OptLevel,
JITCodeEmitter &JCE) {
// FIXME: Move this to TargetJITInfo!
if (DefRelocModel == Reloc::Default)
setRelocationModel(Reloc::Static);
// Machine code emitter pass for ARM.
PM.add(createARMJITCodeEmitterPass(*this, JCE));
return false;
}
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