mirror of
https://github.com/c64scene-ar/llvm-6502.git
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slots. The AsmPrinter will use this information to determine whether to print a spill/reload comment. Remove default argument values. It's too easy to pass a wrong argument value when multiple arguments have default values. Make everything explicit to trap bugs early. Update all targets to adhere to the new interfaces.. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87022 91177308-0d34-0410-b5e6-96231b3b80d8
697 lines
23 KiB
C++
697 lines
23 KiB
C++
//===-- MachineFunction.cpp -----------------------------------------------===//
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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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// Collect native machine code information for a function. This allows
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// target-specific information about the generated code to be stored with each
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// function.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DerivedTypes.h"
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#include "llvm/Function.h"
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#include "llvm/Instructions.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Config/config.h"
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#include "llvm/CodeGen/MachineConstantPool.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/MachineJumpTableInfo.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetLowering.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetFrameInfo.h"
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#include "llvm/Support/GraphWriter.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace {
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struct Printer : public MachineFunctionPass {
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static char ID;
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raw_ostream &OS;
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const std::string Banner;
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Printer(raw_ostream &os, const std::string &banner)
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: MachineFunctionPass(&ID), OS(os), Banner(banner) {}
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const char *getPassName() const { return "MachineFunction Printer"; }
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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MachineFunctionPass::getAnalysisUsage(AU);
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}
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bool runOnMachineFunction(MachineFunction &MF) {
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OS << "# " << Banner << ":\n";
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MF.print(OS);
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return false;
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}
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};
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char Printer::ID = 0;
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}
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/// Returns a newly-created MachineFunction Printer pass. The default banner is
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/// empty.
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///
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FunctionPass *llvm::createMachineFunctionPrinterPass(raw_ostream &OS,
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const std::string &Banner){
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return new Printer(OS, Banner);
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}
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//===---------------------------------------------------------------------===//
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// MachineFunction implementation
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//===---------------------------------------------------------------------===//
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// Out of line virtual method.
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MachineFunctionInfo::~MachineFunctionInfo() {}
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void ilist_traits<MachineBasicBlock>::deleteNode(MachineBasicBlock *MBB) {
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MBB->getParent()->DeleteMachineBasicBlock(MBB);
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}
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MachineFunction::MachineFunction(Function *F,
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const TargetMachine &TM)
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: Fn(F), Target(TM) {
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if (TM.getRegisterInfo())
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RegInfo = new (Allocator.Allocate<MachineRegisterInfo>())
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MachineRegisterInfo(*TM.getRegisterInfo());
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else
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RegInfo = 0;
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MFInfo = 0;
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FrameInfo = new (Allocator.Allocate<MachineFrameInfo>())
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MachineFrameInfo(*TM.getFrameInfo());
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ConstantPool = new (Allocator.Allocate<MachineConstantPool>())
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MachineConstantPool(TM.getTargetData());
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Alignment = TM.getTargetLowering()->getFunctionAlignment(F);
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// Set up jump table.
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const TargetData &TD = *TM.getTargetData();
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bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
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unsigned EntrySize = IsPic ? 4 : TD.getPointerSize();
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unsigned TyAlignment = IsPic ?
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TD.getABITypeAlignment(Type::getInt32Ty(F->getContext()))
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: TD.getPointerABIAlignment();
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JumpTableInfo = new (Allocator.Allocate<MachineJumpTableInfo>())
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MachineJumpTableInfo(EntrySize, TyAlignment);
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}
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MachineFunction::~MachineFunction() {
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BasicBlocks.clear();
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InstructionRecycler.clear(Allocator);
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BasicBlockRecycler.clear(Allocator);
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if (RegInfo) {
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RegInfo->~MachineRegisterInfo();
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Allocator.Deallocate(RegInfo);
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}
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if (MFInfo) {
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MFInfo->~MachineFunctionInfo();
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Allocator.Deallocate(MFInfo);
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}
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FrameInfo->~MachineFrameInfo(); Allocator.Deallocate(FrameInfo);
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ConstantPool->~MachineConstantPool(); Allocator.Deallocate(ConstantPool);
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JumpTableInfo->~MachineJumpTableInfo(); Allocator.Deallocate(JumpTableInfo);
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}
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/// RenumberBlocks - This discards all of the MachineBasicBlock numbers and
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/// recomputes them. This guarantees that the MBB numbers are sequential,
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/// dense, and match the ordering of the blocks within the function. If a
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/// specific MachineBasicBlock is specified, only that block and those after
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/// it are renumbered.
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void MachineFunction::RenumberBlocks(MachineBasicBlock *MBB) {
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if (empty()) { MBBNumbering.clear(); return; }
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MachineFunction::iterator MBBI, E = end();
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if (MBB == 0)
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MBBI = begin();
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else
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MBBI = MBB;
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// Figure out the block number this should have.
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unsigned BlockNo = 0;
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if (MBBI != begin())
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BlockNo = prior(MBBI)->getNumber()+1;
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for (; MBBI != E; ++MBBI, ++BlockNo) {
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if (MBBI->getNumber() != (int)BlockNo) {
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// Remove use of the old number.
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if (MBBI->getNumber() != -1) {
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assert(MBBNumbering[MBBI->getNumber()] == &*MBBI &&
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"MBB number mismatch!");
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MBBNumbering[MBBI->getNumber()] = 0;
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}
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// If BlockNo is already taken, set that block's number to -1.
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if (MBBNumbering[BlockNo])
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MBBNumbering[BlockNo]->setNumber(-1);
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MBBNumbering[BlockNo] = MBBI;
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MBBI->setNumber(BlockNo);
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}
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}
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// Okay, all the blocks are renumbered. If we have compactified the block
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// numbering, shrink MBBNumbering now.
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assert(BlockNo <= MBBNumbering.size() && "Mismatch!");
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MBBNumbering.resize(BlockNo);
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}
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/// CreateMachineInstr - Allocate a new MachineInstr. Use this instead
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/// of `new MachineInstr'.
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///
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MachineInstr *
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MachineFunction::CreateMachineInstr(const TargetInstrDesc &TID,
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DebugLoc DL, bool NoImp) {
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return new (InstructionRecycler.Allocate<MachineInstr>(Allocator))
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MachineInstr(TID, DL, NoImp);
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}
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/// CloneMachineInstr - Create a new MachineInstr which is a copy of the
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/// 'Orig' instruction, identical in all ways except the the instruction
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/// has no parent, prev, or next.
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///
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MachineInstr *
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MachineFunction::CloneMachineInstr(const MachineInstr *Orig) {
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return new (InstructionRecycler.Allocate<MachineInstr>(Allocator))
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MachineInstr(*this, *Orig);
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}
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/// DeleteMachineInstr - Delete the given MachineInstr.
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///
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void
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MachineFunction::DeleteMachineInstr(MachineInstr *MI) {
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MI->~MachineInstr();
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InstructionRecycler.Deallocate(Allocator, MI);
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}
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/// CreateMachineBasicBlock - Allocate a new MachineBasicBlock. Use this
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/// instead of `new MachineBasicBlock'.
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///
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MachineBasicBlock *
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MachineFunction::CreateMachineBasicBlock(const BasicBlock *bb) {
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return new (BasicBlockRecycler.Allocate<MachineBasicBlock>(Allocator))
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MachineBasicBlock(*this, bb);
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}
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/// DeleteMachineBasicBlock - Delete the given MachineBasicBlock.
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///
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void
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MachineFunction::DeleteMachineBasicBlock(MachineBasicBlock *MBB) {
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assert(MBB->getParent() == this && "MBB parent mismatch!");
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MBB->~MachineBasicBlock();
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BasicBlockRecycler.Deallocate(Allocator, MBB);
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}
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MachineMemOperand *
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MachineFunction::getMachineMemOperand(const Value *v, unsigned f,
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int64_t o, uint64_t s,
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unsigned base_alignment) {
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return new (Allocator.Allocate<MachineMemOperand>())
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MachineMemOperand(v, f, o, s, base_alignment);
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}
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MachineMemOperand *
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MachineFunction::getMachineMemOperand(const MachineMemOperand *MMO,
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int64_t Offset, uint64_t Size) {
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return new (Allocator.Allocate<MachineMemOperand>())
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MachineMemOperand(MMO->getValue(), MMO->getFlags(),
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int64_t(uint64_t(MMO->getOffset()) +
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uint64_t(Offset)),
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Size, MMO->getBaseAlignment());
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}
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MachineInstr::mmo_iterator
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MachineFunction::allocateMemRefsArray(unsigned long Num) {
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return Allocator.Allocate<MachineMemOperand *>(Num);
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}
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std::pair<MachineInstr::mmo_iterator, MachineInstr::mmo_iterator>
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MachineFunction::extractLoadMemRefs(MachineInstr::mmo_iterator Begin,
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MachineInstr::mmo_iterator End) {
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// Count the number of load mem refs.
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unsigned Num = 0;
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for (MachineInstr::mmo_iterator I = Begin; I != End; ++I)
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if ((*I)->isLoad())
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++Num;
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// Allocate a new array and populate it with the load information.
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MachineInstr::mmo_iterator Result = allocateMemRefsArray(Num);
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unsigned Index = 0;
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for (MachineInstr::mmo_iterator I = Begin; I != End; ++I) {
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if ((*I)->isLoad()) {
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if (!(*I)->isStore())
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// Reuse the MMO.
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Result[Index] = *I;
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else {
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// Clone the MMO and unset the store flag.
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MachineMemOperand *JustLoad =
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getMachineMemOperand((*I)->getValue(),
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(*I)->getFlags() & ~MachineMemOperand::MOStore,
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(*I)->getOffset(), (*I)->getSize(),
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(*I)->getBaseAlignment());
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Result[Index] = JustLoad;
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}
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++Index;
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}
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}
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return std::make_pair(Result, Result + Num);
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}
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std::pair<MachineInstr::mmo_iterator, MachineInstr::mmo_iterator>
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MachineFunction::extractStoreMemRefs(MachineInstr::mmo_iterator Begin,
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MachineInstr::mmo_iterator End) {
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// Count the number of load mem refs.
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unsigned Num = 0;
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for (MachineInstr::mmo_iterator I = Begin; I != End; ++I)
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if ((*I)->isStore())
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++Num;
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// Allocate a new array and populate it with the store information.
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MachineInstr::mmo_iterator Result = allocateMemRefsArray(Num);
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unsigned Index = 0;
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for (MachineInstr::mmo_iterator I = Begin; I != End; ++I) {
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if ((*I)->isStore()) {
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if (!(*I)->isLoad())
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// Reuse the MMO.
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Result[Index] = *I;
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else {
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// Clone the MMO and unset the load flag.
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MachineMemOperand *JustStore =
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getMachineMemOperand((*I)->getValue(),
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(*I)->getFlags() & ~MachineMemOperand::MOLoad,
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(*I)->getOffset(), (*I)->getSize(),
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(*I)->getBaseAlignment());
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Result[Index] = JustStore;
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}
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++Index;
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}
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}
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return std::make_pair(Result, Result + Num);
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}
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void MachineFunction::dump() const {
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print(errs());
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}
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void MachineFunction::print(raw_ostream &OS) const {
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OS << "# Machine code for function " << Fn->getName() << ":\n";
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// Print Frame Information
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FrameInfo->print(*this, OS);
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// Print JumpTable Information
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JumpTableInfo->print(OS);
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// Print Constant Pool
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ConstantPool->print(OS);
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const TargetRegisterInfo *TRI = getTarget().getRegisterInfo();
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if (RegInfo && !RegInfo->livein_empty()) {
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OS << "Function Live Ins: ";
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for (MachineRegisterInfo::livein_iterator
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I = RegInfo->livein_begin(), E = RegInfo->livein_end(); I != E; ++I) {
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if (TRI)
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OS << "%" << TRI->getName(I->first);
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else
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OS << " %physreg" << I->first;
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if (I->second)
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OS << " in reg%" << I->second;
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if (next(I) != E)
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OS << ", ";
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}
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OS << '\n';
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}
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if (RegInfo && !RegInfo->liveout_empty()) {
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OS << "Function Live Outs: ";
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for (MachineRegisterInfo::liveout_iterator
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I = RegInfo->liveout_begin(), E = RegInfo->liveout_end(); I != E; ++I){
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if (TRI)
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OS << '%' << TRI->getName(*I);
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else
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OS << "%physreg" << *I;
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if (next(I) != E)
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OS << " ";
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}
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OS << '\n';
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}
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for (const_iterator BB = begin(), E = end(); BB != E; ++BB) {
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OS << '\n';
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BB->print(OS);
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}
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OS << "\n# End machine code for function " << Fn->getName() << ".\n\n";
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}
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namespace llvm {
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template<>
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struct DOTGraphTraits<const MachineFunction*> : public DefaultDOTGraphTraits {
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static std::string getGraphName(const MachineFunction *F) {
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return "CFG for '" + F->getFunction()->getNameStr() + "' function";
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}
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static std::string getNodeLabel(const MachineBasicBlock *Node,
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const MachineFunction *Graph,
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bool ShortNames) {
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if (ShortNames && Node->getBasicBlock() &&
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!Node->getBasicBlock()->getName().empty())
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return Node->getBasicBlock()->getNameStr() + ":";
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std::string OutStr;
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{
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raw_string_ostream OSS(OutStr);
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if (ShortNames)
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OSS << Node->getNumber() << ':';
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else
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Node->print(OSS);
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}
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if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
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// Process string output to make it nicer...
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for (unsigned i = 0; i != OutStr.length(); ++i)
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if (OutStr[i] == '\n') { // Left justify
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OutStr[i] = '\\';
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OutStr.insert(OutStr.begin()+i+1, 'l');
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}
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return OutStr;
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}
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};
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}
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void MachineFunction::viewCFG() const
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{
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#ifndef NDEBUG
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ViewGraph(this, "mf" + getFunction()->getNameStr());
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#else
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errs() << "SelectionDAG::viewGraph is only available in debug builds on "
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<< "systems with Graphviz or gv!\n";
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#endif // NDEBUG
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}
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void MachineFunction::viewCFGOnly() const
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{
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#ifndef NDEBUG
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ViewGraph(this, "mf" + getFunction()->getNameStr(), true);
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#else
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errs() << "SelectionDAG::viewGraph is only available in debug builds on "
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<< "systems with Graphviz or gv!\n";
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#endif // NDEBUG
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}
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/// addLiveIn - Add the specified physical register as a live-in value and
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/// create a corresponding virtual register for it.
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unsigned MachineFunction::addLiveIn(unsigned PReg,
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const TargetRegisterClass *RC) {
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assert(RC->contains(PReg) && "Not the correct regclass!");
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unsigned VReg = getRegInfo().createVirtualRegister(RC);
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getRegInfo().addLiveIn(PReg, VReg);
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return VReg;
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}
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/// getDebugLocTuple - Get the DebugLocTuple for a given DebugLoc object.
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DebugLocTuple MachineFunction::getDebugLocTuple(DebugLoc DL) const {
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unsigned Idx = DL.getIndex();
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assert(Idx < DebugLocInfo.DebugLocations.size() &&
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"Invalid index into debug locations!");
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return DebugLocInfo.DebugLocations[Idx];
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}
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//===----------------------------------------------------------------------===//
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// MachineFrameInfo implementation
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//===----------------------------------------------------------------------===//
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/// CreateFixedObject - Create a new object at a fixed location on the stack.
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/// All fixed objects should be created before other objects are created for
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/// efficiency. By default, fixed objects are immutable. This returns an
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/// index with a negative value.
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///
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int MachineFrameInfo::CreateFixedObject(uint64_t Size, int64_t SPOffset,
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bool Immutable, bool isSS) {
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assert(Size != 0 && "Cannot allocate zero size fixed stack objects!");
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Objects.insert(Objects.begin(), StackObject(Size, 1, SPOffset, Immutable,
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isSS));
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return -++NumFixedObjects;
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}
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BitVector
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MachineFrameInfo::getPristineRegs(const MachineBasicBlock *MBB) const {
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assert(MBB && "MBB must be valid");
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const MachineFunction *MF = MBB->getParent();
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assert(MF && "MBB must be part of a MachineFunction");
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const TargetMachine &TM = MF->getTarget();
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const TargetRegisterInfo *TRI = TM.getRegisterInfo();
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BitVector BV(TRI->getNumRegs());
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// Before CSI is calculated, no registers are considered pristine. They can be
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// freely used and PEI will make sure they are saved.
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if (!isCalleeSavedInfoValid())
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return BV;
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for (const unsigned *CSR = TRI->getCalleeSavedRegs(MF); CSR && *CSR; ++CSR)
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BV.set(*CSR);
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// The entry MBB always has all CSRs pristine.
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if (MBB == &MF->front())
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return BV;
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// On other MBBs the saved CSRs are not pristine.
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const std::vector<CalleeSavedInfo> &CSI = getCalleeSavedInfo();
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for (std::vector<CalleeSavedInfo>::const_iterator I = CSI.begin(),
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E = CSI.end(); I != E; ++I)
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BV.reset(I->getReg());
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return BV;
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}
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void MachineFrameInfo::print(const MachineFunction &MF, raw_ostream &OS) const{
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if (Objects.empty()) return;
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const TargetFrameInfo *FI = MF.getTarget().getFrameInfo();
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int ValOffset = (FI ? FI->getOffsetOfLocalArea() : 0);
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OS << "Frame Objects:\n";
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for (unsigned i = 0, e = Objects.size(); i != e; ++i) {
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const StackObject &SO = Objects[i];
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OS << " fi#" << (int)(i-NumFixedObjects) << ": ";
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if (SO.Size == ~0ULL) {
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OS << "dead\n";
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continue;
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}
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if (SO.Size == 0)
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OS << "variable sized";
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else
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OS << "size=" << SO.Size;
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OS << ", align=" << SO.Alignment;
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if (i < NumFixedObjects)
|
|
OS << ", fixed";
|
|
if (i < NumFixedObjects || SO.SPOffset != -1) {
|
|
int64_t Off = SO.SPOffset - ValOffset;
|
|
OS << ", at location [SP";
|
|
if (Off > 0)
|
|
OS << "+" << Off;
|
|
else if (Off < 0)
|
|
OS << Off;
|
|
OS << "]";
|
|
}
|
|
OS << "\n";
|
|
}
|
|
}
|
|
|
|
void MachineFrameInfo::dump(const MachineFunction &MF) const {
|
|
print(MF, errs());
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// MachineJumpTableInfo implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// getJumpTableIndex - Create a new jump table entry in the jump table info
|
|
/// or return an existing one.
|
|
///
|
|
unsigned MachineJumpTableInfo::getJumpTableIndex(
|
|
const std::vector<MachineBasicBlock*> &DestBBs) {
|
|
assert(!DestBBs.empty() && "Cannot create an empty jump table!");
|
|
for (unsigned i = 0, e = JumpTables.size(); i != e; ++i)
|
|
if (JumpTables[i].MBBs == DestBBs)
|
|
return i;
|
|
|
|
JumpTables.push_back(MachineJumpTableEntry(DestBBs));
|
|
return JumpTables.size()-1;
|
|
}
|
|
|
|
/// ReplaceMBBInJumpTables - If Old is the target of any jump tables, update
|
|
/// the jump tables to branch to New instead.
|
|
bool
|
|
MachineJumpTableInfo::ReplaceMBBInJumpTables(MachineBasicBlock *Old,
|
|
MachineBasicBlock *New) {
|
|
assert(Old != New && "Not making a change?");
|
|
bool MadeChange = false;
|
|
for (size_t i = 0, e = JumpTables.size(); i != e; ++i) {
|
|
MachineJumpTableEntry &JTE = JumpTables[i];
|
|
for (size_t j = 0, e = JTE.MBBs.size(); j != e; ++j)
|
|
if (JTE.MBBs[j] == Old) {
|
|
JTE.MBBs[j] = New;
|
|
MadeChange = true;
|
|
}
|
|
}
|
|
return MadeChange;
|
|
}
|
|
|
|
void MachineJumpTableInfo::print(raw_ostream &OS) const {
|
|
if (JumpTables.empty()) return;
|
|
|
|
OS << "Jump Tables:\n";
|
|
|
|
for (unsigned i = 0, e = JumpTables.size(); i != e; ++i) {
|
|
OS << " jt#" << i << ": ";
|
|
for (unsigned j = 0, f = JumpTables[i].MBBs.size(); j != f; ++j)
|
|
OS << " BB#" << JumpTables[i].MBBs[j]->getNumber();
|
|
}
|
|
|
|
OS << '\n';
|
|
}
|
|
|
|
void MachineJumpTableInfo::dump() const { print(errs()); }
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// MachineConstantPool implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
const Type *MachineConstantPoolEntry::getType() const {
|
|
if (isMachineConstantPoolEntry())
|
|
return Val.MachineCPVal->getType();
|
|
return Val.ConstVal->getType();
|
|
}
|
|
|
|
|
|
unsigned MachineConstantPoolEntry::getRelocationInfo() const {
|
|
if (isMachineConstantPoolEntry())
|
|
return Val.MachineCPVal->getRelocationInfo();
|
|
return Val.ConstVal->getRelocationInfo();
|
|
}
|
|
|
|
MachineConstantPool::~MachineConstantPool() {
|
|
for (unsigned i = 0, e = Constants.size(); i != e; ++i)
|
|
if (Constants[i].isMachineConstantPoolEntry())
|
|
delete Constants[i].Val.MachineCPVal;
|
|
}
|
|
|
|
/// CanShareConstantPoolEntry - Test whether the given two constants
|
|
/// can be allocated the same constant pool entry.
|
|
static bool CanShareConstantPoolEntry(Constant *A, Constant *B,
|
|
const TargetData *TD) {
|
|
// Handle the trivial case quickly.
|
|
if (A == B) return true;
|
|
|
|
// If they have the same type but weren't the same constant, quickly
|
|
// reject them.
|
|
if (A->getType() == B->getType()) return false;
|
|
|
|
// For now, only support constants with the same size.
|
|
if (TD->getTypeStoreSize(A->getType()) != TD->getTypeStoreSize(B->getType()))
|
|
return false;
|
|
|
|
// If a floating-point value and an integer value have the same encoding,
|
|
// they can share a constant-pool entry.
|
|
if (ConstantFP *AFP = dyn_cast<ConstantFP>(A))
|
|
if (ConstantInt *BI = dyn_cast<ConstantInt>(B))
|
|
return AFP->getValueAPF().bitcastToAPInt() == BI->getValue();
|
|
if (ConstantFP *BFP = dyn_cast<ConstantFP>(B))
|
|
if (ConstantInt *AI = dyn_cast<ConstantInt>(A))
|
|
return BFP->getValueAPF().bitcastToAPInt() == AI->getValue();
|
|
|
|
// Two vectors can share an entry if each pair of corresponding
|
|
// elements could.
|
|
if (ConstantVector *AV = dyn_cast<ConstantVector>(A))
|
|
if (ConstantVector *BV = dyn_cast<ConstantVector>(B)) {
|
|
if (AV->getType()->getNumElements() != BV->getType()->getNumElements())
|
|
return false;
|
|
for (unsigned i = 0, e = AV->getType()->getNumElements(); i != e; ++i)
|
|
if (!CanShareConstantPoolEntry(AV->getOperand(i),
|
|
BV->getOperand(i), TD))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
// TODO: Handle other cases.
|
|
|
|
return false;
|
|
}
|
|
|
|
/// getConstantPoolIndex - Create a new entry in the constant pool or return
|
|
/// an existing one. User must specify the log2 of the minimum required
|
|
/// alignment for the object.
|
|
///
|
|
unsigned MachineConstantPool::getConstantPoolIndex(Constant *C,
|
|
unsigned Alignment) {
|
|
assert(Alignment && "Alignment must be specified!");
|
|
if (Alignment > PoolAlignment) PoolAlignment = Alignment;
|
|
|
|
// Check to see if we already have this constant.
|
|
//
|
|
// FIXME, this could be made much more efficient for large constant pools.
|
|
for (unsigned i = 0, e = Constants.size(); i != e; ++i)
|
|
if (!Constants[i].isMachineConstantPoolEntry() &&
|
|
CanShareConstantPoolEntry(Constants[i].Val.ConstVal, C, TD)) {
|
|
if ((unsigned)Constants[i].getAlignment() < Alignment)
|
|
Constants[i].Alignment = Alignment;
|
|
return i;
|
|
}
|
|
|
|
Constants.push_back(MachineConstantPoolEntry(C, Alignment));
|
|
return Constants.size()-1;
|
|
}
|
|
|
|
unsigned MachineConstantPool::getConstantPoolIndex(MachineConstantPoolValue *V,
|
|
unsigned Alignment) {
|
|
assert(Alignment && "Alignment must be specified!");
|
|
if (Alignment > PoolAlignment) PoolAlignment = Alignment;
|
|
|
|
// Check to see if we already have this constant.
|
|
//
|
|
// FIXME, this could be made much more efficient for large constant pools.
|
|
int Idx = V->getExistingMachineCPValue(this, Alignment);
|
|
if (Idx != -1)
|
|
return (unsigned)Idx;
|
|
|
|
Constants.push_back(MachineConstantPoolEntry(V, Alignment));
|
|
return Constants.size()-1;
|
|
}
|
|
|
|
void MachineConstantPool::print(raw_ostream &OS) const {
|
|
if (Constants.empty()) return;
|
|
|
|
OS << "Constant Pool:\n";
|
|
for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
|
|
OS << " cp#" << i << ": ";
|
|
if (Constants[i].isMachineConstantPoolEntry())
|
|
Constants[i].Val.MachineCPVal->print(OS);
|
|
else
|
|
OS << *(Value*)Constants[i].Val.ConstVal;
|
|
OS << ", align=" << Constants[i].getAlignment();
|
|
OS << "\n";
|
|
}
|
|
}
|
|
|
|
void MachineConstantPool::dump() const { print(errs()); }
|