forked from OSchip/llvm-project
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
//===-- PTXRegAlloc.cpp - PTX Register Allocator --------------------------===//
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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 contains a register allocator for PTX code.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "ptx-reg-alloc"
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#include "PTX.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/RegAllocRegistry.h"
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using namespace llvm;
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namespace {
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// Special register allocator for PTX.
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class PTXRegAlloc : public MachineFunctionPass {
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public:
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static char ID;
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PTXRegAlloc() : MachineFunctionPass(ID) {
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initializePHIEliminationPass(*PassRegistry::getPassRegistry());
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initializeTwoAddressInstructionPassPass(*PassRegistry::getPassRegistry());
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}
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virtual const char* getPassName() const {
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return "PTX Register Allocator";
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}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesCFG();
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AU.addRequiredID(PHIEliminationID);
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AU.addRequiredID(TwoAddressInstructionPassID);
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MachineFunctionPass::getAnalysisUsage(AU);
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}
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virtual bool runOnMachineFunction(MachineFunction &MF) {
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// We do not actually do anything (at least not yet).
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return false;
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}
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};
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char PTXRegAlloc::ID = 0;
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static RegisterRegAlloc
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ptxRegAlloc("ptx", "PTX register allocator", createPTXRegisterAllocator);
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}
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FunctionPass *llvm::createPTXRegisterAllocator() {
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return new PTXRegAlloc();
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}
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