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95 lines
3.0 KiB
C++
95 lines
3.0 KiB
C++
//===-- PTXMFInfoExtract.cpp - Extract PTX machine function info ----------===//
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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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// This file defines an information extractor for PTX machine functions.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "ptx-mf-info-extract"
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#include "PTX.h"
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#include "PTXTargetMachine.h"
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#include "PTXMachineFunctionInfo.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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// NOTE: PTXMFInfoExtract must after register allocation!
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namespace llvm {
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/// PTXMFInfoExtract - PTX specific code to extract of PTX machine
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/// function information for PTXAsmPrinter
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///
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class PTXMFInfoExtract : public MachineFunctionPass {
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private:
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static char ID;
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public:
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PTXMFInfoExtract(PTXTargetMachine &TM, CodeGenOpt::Level OptLevel)
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: MachineFunctionPass(ID) {}
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virtual bool runOnMachineFunction(MachineFunction &MF);
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virtual const char *getPassName() const {
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return "PTX Machine Function Info Extractor";
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}
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}; // class PTXMFInfoExtract
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} // namespace llvm
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using namespace llvm;
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char PTXMFInfoExtract::ID = 0;
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bool PTXMFInfoExtract::runOnMachineFunction(MachineFunction &MF) {
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PTXMachineFunctionInfo *MFI = MF.getInfo<PTXMachineFunctionInfo>();
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MachineRegisterInfo &MRI = MF.getRegInfo();
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DEBUG(dbgs() << "******** PTX FUNCTION LOCAL VAR REG DEF ********\n");
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unsigned retreg = MFI->retReg();
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DEBUG(dbgs()
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<< "PTX::NoRegister == " << PTX::NoRegister << "\n"
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<< "PTX::NUM_TARGET_REGS == " << PTX::NUM_TARGET_REGS << "\n");
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DEBUG(for (unsigned reg = PTX::NoRegister + 1;
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reg < PTX::NUM_TARGET_REGS; ++reg)
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if (MRI.isPhysRegUsed(reg))
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dbgs() << "Used Reg: " << reg << "\n";);
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// FIXME: This is a slow linear scanning
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for (unsigned reg = PTX::NoRegister + 1; reg < PTX::NUM_TARGET_REGS; ++reg)
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if (MRI.isPhysRegUsed(reg) && reg != retreg && !MFI->isArgReg(reg))
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MFI->addLocalVarReg(reg);
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// Notify MachineFunctionInfo that I've done adding local var reg
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MFI->doneAddLocalVar();
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DEBUG(dbgs() << "Return Reg: " << retreg << "\n");
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DEBUG(for (PTXMachineFunctionInfo::reg_iterator
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i = MFI->argRegBegin(), e = MFI->argRegEnd();
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i != e; ++i)
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dbgs() << "Arg Reg: " << *i << "\n";);
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DEBUG(for (PTXMachineFunctionInfo::reg_iterator
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i = MFI->localVarRegBegin(), e = MFI->localVarRegEnd();
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i != e; ++i)
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dbgs() << "Local Var Reg: " << *i << "\n";);
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return false;
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}
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FunctionPass *llvm::createPTXMFInfoExtract(PTXTargetMachine &TM,
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CodeGenOpt::Level OptLevel) {
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return new PTXMFInfoExtract(TM, OptLevel);
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}
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