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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
318 lines
9.9 KiB
C++
318 lines
9.9 KiB
C++
//===-- XCoreRegisterInfo.cpp - XCore Register Information ----------------===//
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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 the XCore implementation of the MRegisterInfo class.
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//
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//===----------------------------------------------------------------------===//
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#include "XCoreRegisterInfo.h"
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#include "XCore.h"
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#include "XCoreMachineFunctionInfo.h"
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#include "llvm/ADT/BitVector.h"
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#include "llvm/ADT/STLExtras.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/MachineModuleInfo.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/CodeGen/RegisterScavenging.h"
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#include "llvm/Function.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/TargetFrameLowering.h"
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#include "llvm/Target/TargetInstrInfo.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/Type.h"
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#define GET_REGINFO_TARGET_DESC
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#include "XCoreGenRegisterInfo.inc"
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using namespace llvm;
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XCoreRegisterInfo::XCoreRegisterInfo(const TargetInstrInfo &tii)
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: XCoreGenRegisterInfo(XCore::LR), TII(tii) {
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}
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// helper functions
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static inline bool isImmUs(unsigned val) {
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return val <= 11;
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}
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static inline bool isImmU6(unsigned val) {
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return val < (1 << 6);
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}
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static inline bool isImmU16(unsigned val) {
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return val < (1 << 16);
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}
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bool XCoreRegisterInfo::needsFrameMoves(const MachineFunction &MF) {
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return MF.getMMI().hasDebugInfo() ||
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MF.getFunction()->needsUnwindTableEntry();
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}
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const uint16_t* XCoreRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
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const {
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static const uint16_t CalleeSavedRegs[] = {
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XCore::R4, XCore::R5, XCore::R6, XCore::R7,
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XCore::R8, XCore::R9, XCore::R10, XCore::LR,
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0
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};
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return CalleeSavedRegs;
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}
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BitVector XCoreRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
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BitVector Reserved(getNumRegs());
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const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
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Reserved.set(XCore::CP);
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Reserved.set(XCore::DP);
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Reserved.set(XCore::SP);
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Reserved.set(XCore::LR);
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if (TFI->hasFP(MF)) {
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Reserved.set(XCore::R10);
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}
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return Reserved;
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}
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bool
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XCoreRegisterInfo::requiresRegisterScavenging(const MachineFunction &MF) const {
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const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
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// TODO can we estimate stack size?
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return TFI->hasFP(MF);
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}
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bool
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XCoreRegisterInfo::trackLivenessAfterRegAlloc(const MachineFunction &MF) const {
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return requiresRegisterScavenging(MF);
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}
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bool
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XCoreRegisterInfo::useFPForScavengingIndex(const MachineFunction &MF) const {
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return false;
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}
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// This function eliminates ADJCALLSTACKDOWN,
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// ADJCALLSTACKUP pseudo instructions
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void XCoreRegisterInfo::
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eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const {
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const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
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if (!TFI->hasReservedCallFrame(MF)) {
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// Turn the adjcallstackdown instruction into 'extsp <amt>' and the
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// adjcallstackup instruction into 'ldaw sp, sp[<amt>]'
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MachineInstr *Old = I;
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uint64_t Amount = Old->getOperand(0).getImm();
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if (Amount != 0) {
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// We need to keep the stack aligned properly. To do this, we round the
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// amount of space needed for the outgoing arguments up to the next
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// alignment boundary.
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unsigned Align = TFI->getStackAlignment();
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Amount = (Amount+Align-1)/Align*Align;
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assert(Amount%4 == 0);
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Amount /= 4;
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bool isU6 = isImmU6(Amount);
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if (!isU6 && !isImmU16(Amount)) {
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// FIX could emit multiple instructions in this case.
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#ifndef NDEBUG
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errs() << "eliminateCallFramePseudoInstr size too big: "
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<< Amount << "\n";
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#endif
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llvm_unreachable(0);
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}
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MachineInstr *New;
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if (Old->getOpcode() == XCore::ADJCALLSTACKDOWN) {
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int Opcode = isU6 ? XCore::EXTSP_u6 : XCore::EXTSP_lu6;
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New=BuildMI(MF, Old->getDebugLoc(), TII.get(Opcode))
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.addImm(Amount);
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} else {
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assert(Old->getOpcode() == XCore::ADJCALLSTACKUP);
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int Opcode = isU6 ? XCore::LDAWSP_ru6_RRegs : XCore::LDAWSP_lru6_RRegs;
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New=BuildMI(MF, Old->getDebugLoc(), TII.get(Opcode), XCore::SP)
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.addImm(Amount);
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}
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// Replace the pseudo instruction with a new instruction...
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MBB.insert(I, New);
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}
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}
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MBB.erase(I);
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}
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void
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XCoreRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
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int SPAdj, RegScavenger *RS) const {
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assert(SPAdj == 0 && "Unexpected");
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MachineInstr &MI = *II;
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DebugLoc dl = MI.getDebugLoc();
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unsigned i = 0;
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while (!MI.getOperand(i).isFI()) {
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++i;
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assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!");
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}
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MachineOperand &FrameOp = MI.getOperand(i);
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int FrameIndex = FrameOp.getIndex();
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MachineFunction &MF = *MI.getParent()->getParent();
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const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
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int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex);
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int StackSize = MF.getFrameInfo()->getStackSize();
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#ifndef NDEBUG
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DEBUG(errs() << "\nFunction : "
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<< MF.getName() << "\n");
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DEBUG(errs() << "<--------->\n");
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DEBUG(MI.print(errs()));
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DEBUG(errs() << "FrameIndex : " << FrameIndex << "\n");
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DEBUG(errs() << "FrameOffset : " << Offset << "\n");
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DEBUG(errs() << "StackSize : " << StackSize << "\n");
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#endif
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Offset += StackSize;
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unsigned FrameReg = getFrameRegister(MF);
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// Special handling of DBG_VALUE instructions.
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if (MI.isDebugValue()) {
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MI.getOperand(i).ChangeToRegister(FrameReg, false /*isDef*/);
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MI.getOperand(i+1).ChangeToImmediate(Offset);
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return;
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}
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// fold constant into offset.
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Offset += MI.getOperand(i + 1).getImm();
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MI.getOperand(i + 1).ChangeToImmediate(0);
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assert(Offset%4 == 0 && "Misaligned stack offset");
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DEBUG(errs() << "Offset : " << Offset << "\n" << "<--------->\n");
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Offset/=4;
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bool FP = TFI->hasFP(MF);
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unsigned Reg = MI.getOperand(0).getReg();
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bool isKill = MI.getOpcode() == XCore::STWFI && MI.getOperand(0).isKill();
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assert(XCore::GRRegsRegClass.contains(Reg) && "Unexpected register operand");
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MachineBasicBlock &MBB = *MI.getParent();
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if (FP) {
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bool isUs = isImmUs(Offset);
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if (!isUs) {
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if (!RS)
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report_fatal_error("eliminateFrameIndex Frame size too big: " +
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Twine(Offset));
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unsigned ScratchReg = RS->scavengeRegister(&XCore::GRRegsRegClass, II,
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SPAdj);
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loadConstant(MBB, II, ScratchReg, Offset, dl);
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switch (MI.getOpcode()) {
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case XCore::LDWFI:
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BuildMI(MBB, II, dl, TII.get(XCore::LDW_3r), Reg)
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.addReg(FrameReg)
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.addReg(ScratchReg, RegState::Kill);
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break;
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case XCore::STWFI:
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BuildMI(MBB, II, dl, TII.get(XCore::STW_3r))
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.addReg(Reg, getKillRegState(isKill))
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.addReg(FrameReg)
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.addReg(ScratchReg, RegState::Kill);
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break;
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case XCore::LDAWFI:
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BuildMI(MBB, II, dl, TII.get(XCore::LDAWF_l3r), Reg)
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.addReg(FrameReg)
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.addReg(ScratchReg, RegState::Kill);
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break;
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default:
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llvm_unreachable("Unexpected Opcode");
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}
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} else {
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switch (MI.getOpcode()) {
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case XCore::LDWFI:
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BuildMI(MBB, II, dl, TII.get(XCore::LDW_2rus), Reg)
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.addReg(FrameReg)
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.addImm(Offset);
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break;
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case XCore::STWFI:
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BuildMI(MBB, II, dl, TII.get(XCore::STW_2rus))
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.addReg(Reg, getKillRegState(isKill))
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.addReg(FrameReg)
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.addImm(Offset);
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break;
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case XCore::LDAWFI:
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BuildMI(MBB, II, dl, TII.get(XCore::LDAWF_l2rus), Reg)
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.addReg(FrameReg)
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.addImm(Offset);
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break;
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default:
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llvm_unreachable("Unexpected Opcode");
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}
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}
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} else {
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bool isU6 = isImmU6(Offset);
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if (!isU6 && !isImmU16(Offset))
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report_fatal_error("eliminateFrameIndex Frame size too big: " +
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Twine(Offset));
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switch (MI.getOpcode()) {
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int NewOpcode;
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case XCore::LDWFI:
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NewOpcode = (isU6) ? XCore::LDWSP_ru6 : XCore::LDWSP_lru6;
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BuildMI(MBB, II, dl, TII.get(NewOpcode), Reg)
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.addImm(Offset);
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break;
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case XCore::STWFI:
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NewOpcode = (isU6) ? XCore::STWSP_ru6 : XCore::STWSP_lru6;
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BuildMI(MBB, II, dl, TII.get(NewOpcode))
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.addReg(Reg, getKillRegState(isKill))
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.addImm(Offset);
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break;
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case XCore::LDAWFI:
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NewOpcode = (isU6) ? XCore::LDAWSP_ru6 : XCore::LDAWSP_lru6;
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BuildMI(MBB, II, dl, TII.get(NewOpcode), Reg)
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.addImm(Offset);
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break;
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default:
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llvm_unreachable("Unexpected Opcode");
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}
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}
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// Erase old instruction.
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MBB.erase(II);
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}
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void XCoreRegisterInfo::
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loadConstant(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
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unsigned DstReg, int64_t Value, DebugLoc dl) const {
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// TODO use mkmsk if possible.
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if (!isImmU16(Value)) {
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// TODO use constant pool.
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report_fatal_error("loadConstant value too big " + Twine(Value));
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}
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int Opcode = isImmU6(Value) ? XCore::LDC_ru6 : XCore::LDC_lru6;
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BuildMI(MBB, I, dl, TII.get(Opcode), DstReg).addImm(Value);
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}
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unsigned XCoreRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
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const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
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return TFI->hasFP(MF) ? XCore::R10 : XCore::SP;
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}
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