ccb673659a
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. llvm-svn: 149672
74 lines
2.5 KiB
C++
74 lines
2.5 KiB
C++
//===-- MSP430TargetMachine.cpp - Define TargetMachine for MSP430 ---------===//
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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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// Top-level implementation for the MSP430 target.
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//
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//===----------------------------------------------------------------------===//
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#include "MSP430.h"
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#include "MSP430TargetMachine.h"
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#include "llvm/PassManager.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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extern "C" void LLVMInitializeMSP430Target() {
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// Register the target.
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RegisterTargetMachine<MSP430TargetMachine> X(TheMSP430Target);
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}
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MSP430TargetMachine::MSP430TargetMachine(const Target &T,
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StringRef TT,
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StringRef CPU,
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StringRef FS,
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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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// FIXME: Check TargetData string.
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DataLayout("e-p:16:16:16-i8:8:8-i16:16:16-i32:16:32-n8:16"),
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InstrInfo(*this), TLInfo(*this), TSInfo(*this),
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FrameLowering(Subtarget) { }
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namespace {
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/// MSP430 Code Generator Pass Configuration Options.
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class MSP430PassConfig : public TargetPassConfig {
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public:
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MSP430PassConfig(MSP430TargetMachine *TM, PassManagerBase &PM,
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bool DisableVerifyFlag)
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: TargetPassConfig(TM, PM, DisableVerifyFlag) {}
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MSP430TargetMachine &getMSP430TargetMachine() const {
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return getTM<MSP430TargetMachine>();
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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 *MSP430TargetMachine::createPassConfig(PassManagerBase &PM,
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bool DisableVerify) {
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return new MSP430PassConfig(this, PM, DisableVerify);
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}
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bool MSP430PassConfig::addInstSelector() {
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// Install an instruction selector.
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PM.add(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
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return false;
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}
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bool MSP430PassConfig::addPreEmitPass() {
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// Must run branch selection immediately preceding the asm printer.
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PM.add(createMSP430BranchSelectionPass());
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return false;
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}
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