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//===-- ARMTargetMachine.cpp - Define TargetMachine for ARM ---------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the "Instituto Nokia de Tecnologia" and
// is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
#include "ARMTargetMachine.h"
#include "ARMTargetAsmInfo.h"
#include "ARMFrameInfo.h"
#include "ARM.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetMachineRegistry.h"
#include "llvm/Target/TargetOptions.h"
using namespace llvm;
static cl::opt<bool> DisableLdStOpti("disable-arm-loadstore-opti", cl::Hidden,
cl::desc("Disable load store optimization pass"));
namespace {
// Register the target.
RegisterTarget<ARMTargetMachine> X("arm", " ARM");
RegisterTarget<ThumbTargetMachine> Y("thumb", " Thumb");
}
/// ThumbTargetMachine - Create an Thumb architecture model.
///
unsigned ThumbTargetMachine::getModuleMatchQuality(const Module &M) {
std::string TT = M.getTargetTriple();
if (TT.size() >= 6 && std::string(TT.begin(), TT.begin()+6) == "thumb-")
return 20;
return M.getPointerSize() == Module::Pointer32;
}
ThumbTargetMachine::ThumbTargetMachine(const Module &M, const std::string &FS)
: ARMTargetMachine(M, FS, true) {
}
/// TargetMachine ctor - Create an ARM architecture model.
///
ARMTargetMachine::ARMTargetMachine(const Module &M, const std::string &FS,
bool isThumb)
: Subtarget(M, FS, isThumb),
DataLayout(Subtarget.isAPCS_ABI() ?
// APCS ABI
(isThumb ?
std::string("e-p:32:32-f64:32:32-i64:32:32-"
"i16:16:32-i8:8:32-i1:8:32-a:0:32") :
std::string("e-p:32:32-f64:32:32-i64:32:32")) :
// AAPCS ABI
(isThumb ?
std::string("e-p:32:32-f64:64:64-i64:64:64-"
"i16:16:32-i8:8:32-i1:8:32-a:0:32") :
std::string("e-p:32:32-f64:64:64-i64:64:64"))),
InstrInfo(Subtarget),
FrameInfo(Subtarget),
TLInfo(*this) {}
unsigned ARMTargetMachine::getModuleMatchQuality(const Module &M) {
std::string TT = M.getTargetTriple();
if (TT.size() >= 4 && std::string(TT.begin(), TT.begin()+4) == "arm-")
return 20;
return M.getPointerSize() == Module::Pointer32;
}
const TargetAsmInfo *ARMTargetMachine::createTargetAsmInfo() const {
return new ARMTargetAsmInfo(*this);
}
// Pass Pipeline Configuration
bool ARMTargetMachine::addInstSelector(FunctionPassManager &PM, bool Fast) {
PM.add(createARMISelDag(*this));
return false;
}
bool ARMTargetMachine::addPreEmitPass(FunctionPassManager &PM, bool Fast) {
// FIXME: temporarily disabling load / store optimization pass for Thumb mode.
if (!Fast && !DisableLdStOpti && !Subtarget.isThumb())
PM.add(createARMLoadStoreOptimizationPass());
PM.add(createARMConstantIslandPass());
return true;
}
bool ARMTargetMachine::addAssemblyEmitter(FunctionPassManager &PM, bool Fast,
std::ostream &Out) {
// Output assembly language.
PM.add(createARMCodePrinterPass(Out, *this));
return false;
}
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