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//===-- PTXMFInfoExtract.cpp - Extract PTX machine function info ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines an information extractor for PTX machine functions.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "ptx-mf-info-extract"
#include "PTX.h"
#include "PTXTargetMachine.h"
#include "PTXMachineFunctionInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
namespace llvm {
/// PTXMFInfoExtract - PTX specific code to extract of PTX machine
/// function information for PTXAsmPrinter
///
class PTXMFInfoExtract : public MachineFunctionPass {
private:
static char ID;
public:
PTXMFInfoExtract(PTXTargetMachine &TM, CodeGenOpt::Level OptLevel)
: MachineFunctionPass(ID) {}
virtual bool runOnMachineFunction(MachineFunction &MF);
virtual const char *getPassName() const {
return "PTX Machine Function Info Extractor";
}
}; // class PTXMFInfoExtract
} // namespace llvm
using namespace llvm;
char PTXMFInfoExtract::ID = 0;
bool PTXMFInfoExtract::runOnMachineFunction(MachineFunction &MF) {
PTXMachineFunctionInfo *MFI = MF.getInfo<PTXMachineFunctionInfo>();
MachineRegisterInfo &MRI = MF.getRegInfo();
DEBUG(dbgs() << "****** PTX FUNCTION LOCAL VAR REG DEF ******\n");
unsigned reg_ret = MFI->retReg();
// FIXME: This is a slow linear scanning
for (unsigned reg = PTX::NoRegister + 1; reg < PTX::NUM_TARGET_REGS; ++reg)
if (MRI.isPhysRegUsed(reg) && reg != reg_ret && !MFI->isArgReg(reg))
MFI->addLocalVarReg(reg);
// Notify MachineFunctionInfo that I've done adding local var reg
MFI->doneAddLocalVar();
DEBUG(for (PTXMachineFunctionInfo::reg_iterator
i = MFI->localVarRegBegin(), e = MFI->localVarRegEnd();
i != e; ++i)
dbgs() << "Used Reg: " << *i << "\n";);
return false;
}
FunctionPass *llvm::createPTXMFInfoExtract(PTXTargetMachine &TM,
CodeGenOpt::Level OptLevel) {
return new PTXMFInfoExtract(TM, OptLevel);
}
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