llvm-6502/lib/Target/PowerPC/PPCTargetMachine.cpp

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//===-- PPCTargetMachine.cpp - Define TargetMachine for PowerPC -----------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Top-level implementation for the PowerPC target.
//
//===----------------------------------------------------------------------===//
#include "PPC.h"
#include "PPCFrameInfo.h"
#include "PPCTargetMachine.h"
#include "PPCJITInfo.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetMachineRegistry.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Support/CommandLine.h"
#include <iostream>
using namespace llvm;
namespace {
// Register the targets
RegisterTarget<PPCTargetMachine>
X("ppc32", " PowerPC");
}
unsigned PPCTargetMachine::getJITMatchQuality() {
#if defined(__POWERPC__) || defined (__ppc__) || defined(_POWER)
return 10;
#else
return 0;
#endif
}
unsigned PPCTargetMachine::getModuleMatchQuality(const Module &M) {
// We strongly match "powerpc-*".
std::string TT = M.getTargetTriple();
if (TT.size() >= 8 && std::string(TT.begin(), TT.begin()+8) == "powerpc-")
return 20;
if (M.getEndianness() == Module::BigEndian &&
M.getPointerSize() == Module::Pointer32)
return 10; // Weak match
else if (M.getEndianness() != Module::AnyEndianness ||
M.getPointerSize() != Module::AnyPointerSize)
return 0; // Match for some other target
return getJITMatchQuality()/2;
}
PPCTargetMachine::PPCTargetMachine(const Module &M, const std::string &FS)
: TargetMachine("PowerPC", false, 4, 4, 4, 4, 4, 4, 2, 1, 1),
Subtarget(M, FS), FrameInfo(*this, false), JITInfo(*this),
TLInfo(*this), InstrItins(Subtarget.getInstrItineraryData()) {
if (TargetDefault == PPCTarget) {
if (Subtarget.isAIX()) PPCTarget = TargetAIX;
if (Subtarget.isDarwin()) PPCTarget = TargetDarwin;
}
if (getRelocationModel() == Reloc::Default)
if (Subtarget.isDarwin())
setRelocationModel(Reloc::DynamicNoPIC);
else
setRelocationModel(Reloc::PIC);
}
/// addPassesToEmitFile - Add passes to the specified pass manager to implement
/// a static compiler for this target.
///
bool PPCTargetMachine::addPassesToEmitFile(PassManager &PM,
std::ostream &Out,
CodeGenFileType FileType,
bool Fast) {
if (FileType != TargetMachine::AssemblyFile) return true;
// Run loop strength reduction before anything else.
if (!Fast) PM.add(createLoopStrengthReducePass(&TLInfo));
// FIXME: Implement efficient support for garbage collection intrinsics.
PM.add(createLowerGCPass());
// FIXME: Implement the invoke/unwind instructions!
PM.add(createLowerInvokePass());
// Clean up after other passes, e.g. merging critical edges.
if (!Fast) PM.add(createCFGSimplificationPass());
// Make sure that no unreachable blocks are instruction selected.
PM.add(createUnreachableBlockEliminationPass());
// Install an instruction selector.
PM.add(createPPCISelDag(*this));
if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
PM.add(createRegisterAllocator());
if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
PM.add(createPrologEpilogCodeInserter());
// Must run branch selection immediately preceding the asm printer
PM.add(createPPCBranchSelectionPass());
// Decide which asm printer to use. If the user has not specified one on
// the command line, choose whichever one matches the default (current host).
switch (PPCTarget) {
case TargetAIX:
PM.add(createAIXAsmPrinter(Out, *this));
break;
case TargetDefault:
case TargetDarwin:
PM.add(createDarwinAsmPrinter(Out, *this));
break;
}
PM.add(createMachineCodeDeleter());
return false;
}
void PPCJITInfo::addPassesToJITCompile(FunctionPassManager &PM) {
// The JIT should use dynamic-no-pic relocation model.
TM.setRelocationModel(Reloc::DynamicNoPIC);
// Run loop strength reduction before anything else.
PM.add(createLoopStrengthReducePass(TM.getTargetLowering()));
// FIXME: Implement efficient support for garbage collection intrinsics.
PM.add(createLowerGCPass());
// FIXME: Implement the invoke/unwind instructions!
PM.add(createLowerInvokePass());
// Clean up after other passes, e.g. merging critical edges.
PM.add(createCFGSimplificationPass());
// Make sure that no unreachable blocks are instruction selected.
PM.add(createUnreachableBlockEliminationPass());
// Install an instruction selector.
PM.add(createPPCISelDag(TM));
PM.add(createRegisterAllocator());
PM.add(createPrologEpilogCodeInserter());
// Must run branch selection immediately preceding the asm printer
PM.add(createPPCBranchSelectionPass());
if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
}