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//===-- PTXRegAlloc.cpp - PTX Register Allocator --------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains a register allocator for PTX code.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "ptx-reg-alloc"
#include "PTX.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/RegAllocRegistry.h"
using namespace llvm;
namespace {
// Special register allocator for PTX.
class PTXRegAlloc : public MachineFunctionPass {
public:
static char ID;
PTXRegAlloc() : MachineFunctionPass(ID) {
initializePHIEliminationPass(*PassRegistry::getPassRegistry());
initializeTwoAddressInstructionPassPass(*PassRegistry::getPassRegistry());
}
virtual const char* getPassName() const {
return "PTX Register Allocator";
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
AU.addRequiredID(PHIEliminationID);
AU.addRequiredID(TwoAddressInstructionPassID);
MachineFunctionPass::getAnalysisUsage(AU);
}
virtual bool runOnMachineFunction(MachineFunction &MF) {
// We do not actually do anything (at least not yet).
return false;
}
};
char PTXRegAlloc::ID = 0;
static RegisterRegAlloc
ptxRegAlloc("ptx", "PTX register allocator", createPTXRegisterAllocator);
}
FunctionPass *llvm::createPTXRegisterAllocator() {
return new PTXRegAlloc();
}
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