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https://github.com/c64scene-ar/llvm-6502.git
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843ee2e6a4
Allows command line overrides to be centralized in LLVMTargetMachine.cpp. LLVMTargetMachine can intercept common passes and give precedence to command line overrides. Allows adding "internal" target configuration options without touching TargetOptions. Encapsulates the PassManager. Provides a good point to initialize all CodeGen passes so that Pass ID's can be used in APIs. Allows modifying the target configuration hooks without rebuilding the world. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149672 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
2.9 KiB
C++
84 lines
2.9 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 "MBlaze.h"
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#include "MBlazeTargetMachine.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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bool DisableVerifyFlag)
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: TargetPassConfig(TM, PM, DisableVerifyFlag) {}
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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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bool DisableVerify) {
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return new MBlazePassConfig(this, PM, DisableVerify);
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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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