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Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
195 lines
6.1 KiB
C++
195 lines
6.1 KiB
C++
//===-- llvm/CodeGen/Spiller.cpp - Spiller -------------------------------===//
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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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#define DEBUG_TYPE "spiller"
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#include "Spiller.h"
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#include "llvm/CodeGen/LiveIntervalAnalysis.h"
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#include "llvm/CodeGen/LiveRangeEdit.h"
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#include "llvm/CodeGen/LiveStackAnalysis.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineLoopInfo.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/CodeGen/VirtRegMap.h"
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#include "llvm/Support/CommandLine.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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#include "llvm/Target/TargetInstrInfo.h"
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#include "llvm/Target/TargetMachine.h"
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using namespace llvm;
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namespace {
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enum SpillerName { trivial, inline_ };
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}
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static cl::opt<SpillerName>
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spillerOpt("spiller",
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cl::desc("Spiller to use: (default: standard)"),
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cl::Prefix,
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cl::values(clEnumVal(trivial, "trivial spiller"),
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clEnumValN(inline_, "inline", "inline spiller"),
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clEnumValEnd),
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cl::init(trivial));
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// Spiller virtual destructor implementation.
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Spiller::~Spiller() {}
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namespace {
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/// Utility class for spillers.
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class SpillerBase : public Spiller {
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protected:
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MachineFunctionPass *pass;
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MachineFunction *mf;
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VirtRegMap *vrm;
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LiveIntervals *lis;
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MachineFrameInfo *mfi;
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MachineRegisterInfo *mri;
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const TargetInstrInfo *tii;
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const TargetRegisterInfo *tri;
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/// Construct a spiller base.
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SpillerBase(MachineFunctionPass &pass, MachineFunction &mf, VirtRegMap &vrm)
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: pass(&pass), mf(&mf), vrm(&vrm)
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{
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lis = &pass.getAnalysis<LiveIntervals>();
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mfi = mf.getFrameInfo();
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mri = &mf.getRegInfo();
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tii = mf.getTarget().getInstrInfo();
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tri = mf.getTarget().getRegisterInfo();
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}
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/// Add spill ranges for every use/def of the live interval, inserting loads
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/// immediately before each use, and stores after each def. No folding or
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/// remat is attempted.
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void trivialSpillEverywhere(LiveRangeEdit& LRE) {
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LiveInterval* li = &LRE.getParent();
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DEBUG(dbgs() << "Spilling everywhere " << *li << "\n");
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assert(li->weight != HUGE_VALF &&
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"Attempting to spill already spilled value.");
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assert(!TargetRegisterInfo::isStackSlot(li->reg) &&
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"Trying to spill a stack slot.");
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DEBUG(dbgs() << "Trivial spill everywhere of reg" << li->reg << "\n");
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const TargetRegisterClass *trc = mri->getRegClass(li->reg);
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unsigned ss = vrm->assignVirt2StackSlot(li->reg);
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// Iterate over reg uses/defs.
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for (MachineRegisterInfo::reg_iterator
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regItr = mri->reg_begin(li->reg); regItr != mri->reg_end();) {
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// Grab the use/def instr.
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MachineInstr *mi = &*regItr;
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DEBUG(dbgs() << " Processing " << *mi);
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// Step regItr to the next use/def instr.
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do {
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++regItr;
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} while (regItr != mri->reg_end() && (&*regItr == mi));
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// Collect uses & defs for this instr.
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SmallVector<unsigned, 2> indices;
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bool hasUse = false;
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bool hasDef = false;
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for (unsigned i = 0; i != mi->getNumOperands(); ++i) {
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MachineOperand &op = mi->getOperand(i);
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if (!op.isReg() || op.getReg() != li->reg)
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continue;
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hasUse |= mi->getOperand(i).isUse();
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hasDef |= mi->getOperand(i).isDef();
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indices.push_back(i);
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}
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// Create a new vreg & interval for this instr.
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LiveInterval *newLI = &LRE.create();
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newLI->weight = HUGE_VALF;
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// Update the reg operands & kill flags.
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for (unsigned i = 0; i < indices.size(); ++i) {
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unsigned mopIdx = indices[i];
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MachineOperand &mop = mi->getOperand(mopIdx);
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mop.setReg(newLI->reg);
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if (mop.isUse() && !mi->isRegTiedToDefOperand(mopIdx)) {
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mop.setIsKill(true);
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}
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}
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assert(hasUse || hasDef);
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// Insert reload if necessary.
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MachineBasicBlock::iterator miItr(mi);
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if (hasUse) {
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tii->loadRegFromStackSlot(*mi->getParent(), miItr, newLI->reg, ss, trc,
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tri);
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MachineInstr *loadInstr(prior(miItr));
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SlotIndex loadIndex =
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lis->InsertMachineInstrInMaps(loadInstr).getRegSlot();
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SlotIndex endIndex = loadIndex.getNextIndex();
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VNInfo *loadVNI =
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newLI->getNextValue(loadIndex, lis->getVNInfoAllocator());
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newLI->addRange(LiveRange(loadIndex, endIndex, loadVNI));
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}
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// Insert store if necessary.
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if (hasDef) {
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tii->storeRegToStackSlot(*mi->getParent(), llvm::next(miItr),newLI->reg,
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true, ss, trc, tri);
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MachineInstr *storeInstr(llvm::next(miItr));
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SlotIndex storeIndex =
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lis->InsertMachineInstrInMaps(storeInstr).getRegSlot();
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SlotIndex beginIndex = storeIndex.getPrevIndex();
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VNInfo *storeVNI =
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newLI->getNextValue(beginIndex, lis->getVNInfoAllocator());
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newLI->addRange(LiveRange(beginIndex, storeIndex, storeVNI));
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}
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}
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}
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};
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} // end anonymous namespace
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namespace {
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/// Spills any live range using the spill-everywhere method with no attempt at
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/// folding.
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class TrivialSpiller : public SpillerBase {
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public:
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TrivialSpiller(MachineFunctionPass &pass, MachineFunction &mf,
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VirtRegMap &vrm)
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: SpillerBase(pass, mf, vrm) {}
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void spill(LiveRangeEdit &LRE) {
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// Ignore spillIs - we don't use it.
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trivialSpillEverywhere(LRE);
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}
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};
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} // end anonymous namespace
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void Spiller::anchor() { }
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llvm::Spiller* llvm::createSpiller(MachineFunctionPass &pass,
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MachineFunction &mf,
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VirtRegMap &vrm) {
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switch (spillerOpt) {
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case trivial: return new TrivialSpiller(pass, mf, vrm);
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case inline_: return createInlineSpiller(pass, mf, vrm);
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}
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llvm_unreachable("Invalid spiller optimization");
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}
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