forked from OSchip/llvm-project
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
//===-- MBlazeTargetMachine.cpp - Define TargetMachine for MBlaze ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Implements the info about MBlaze target spec.
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//
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//===----------------------------------------------------------------------===//
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#include "MBlazeTargetMachine.h"
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#include "MBlaze.h"
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#include "llvm/PassManager.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Target/TargetOptions.h"
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using namespace llvm;
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extern "C" void LLVMInitializeMBlazeTarget() {
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// Register the target.
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RegisterTargetMachine<MBlazeTargetMachine> X(TheMBlazeTarget);
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}
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// DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
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// The stack is always 8 byte aligned
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// On function prologue, the stack is created by decrementing
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// its pointer. Once decremented, all references are done with positive
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// offset from the stack/frame pointer, using StackGrowsUp enables
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// an easier handling.
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MBlazeTargetMachine::
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MBlazeTargetMachine(const Target &T, StringRef TT,
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StringRef CPU, StringRef FS, const TargetOptions &Options,
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Reloc::Model RM, CodeModel::Model CM,
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CodeGenOpt::Level OL)
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: LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
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Subtarget(TT, CPU, FS),
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DataLayout("E-p:32:32:32-i8:8:8-i16:16:16"),
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InstrInfo(*this),
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FrameLowering(Subtarget),
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TLInfo(*this), TSInfo(*this), ELFWriterInfo(*this),
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InstrItins(Subtarget.getInstrItineraryData()) {
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}
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namespace {
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/// MBlaze Code Generator Pass Configuration Options.
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class MBlazePassConfig : public TargetPassConfig {
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public:
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MBlazePassConfig(MBlazeTargetMachine *TM, PassManagerBase &PM)
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: TargetPassConfig(TM, PM) {}
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MBlazeTargetMachine &getMBlazeTargetMachine() const {
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return getTM<MBlazeTargetMachine>();
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}
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virtual bool addInstSelector();
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virtual bool addPreEmitPass();
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};
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} // namespace
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TargetPassConfig *MBlazeTargetMachine::createPassConfig(PassManagerBase &PM) {
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return new MBlazePassConfig(this, PM);
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}
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// Install an instruction selector pass using
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// the ISelDag to gen MBlaze code.
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bool MBlazePassConfig::addInstSelector() {
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PM->add(createMBlazeISelDag(getMBlazeTargetMachine()));
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return false;
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}
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// Implemented by targets that want to run passes immediately before
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// machine code is emitted. return true if -print-machineinstrs should
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// print out the code after the passes.
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bool MBlazePassConfig::addPreEmitPass() {
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PM->add(createMBlazeDelaySlotFillerPass(getMBlazeTargetMachine()));
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return true;
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}
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