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behavior based on other files defining DEBUG_TYPE, which means it cannot define DEBUG_TYPE at all. This is actually better IMO as it forces folks to define relevant DEBUG_TYPEs for their files. However, it requires all files that currently use DEBUG(...) to define a DEBUG_TYPE if they don't already. I've updated all such files in LLVM and will do the same for other upstream projects. This still leaves one important change in how LLVM uses the DEBUG_TYPE macro going forward: we need to only define the macro *after* header files have been #include-ed. Previously, this wasn't possible because Debug.h required the macro to be pre-defined. This commit removes that. By defining DEBUG_TYPE after the includes two things are fixed: - Header files that need to provide a DEBUG_TYPE for some inline code can do so by defining the macro before their inline code and undef-ing it afterward so the macro does not escape. - We no longer have rampant ODR violations due to including headers with different DEBUG_TYPE definitions. This may be mostly an academic violation today, but with modules these types of violations are easy to check for and potentially very relevant. Where necessary to suppor headers with DEBUG_TYPE, I have moved the definitions below the includes in this commit. I plan to move the rest of the DEBUG_TYPE macros in LLVM in subsequent commits; this one is big enough. The comments in Debug.h, which were hilariously out of date already, have been updated to reflect the recommended practice going forward. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206822 91177308-0d34-0410-b5e6-96231b3b80d8
154 lines
4.9 KiB
C++
154 lines
4.9 KiB
C++
//===-- Mips16RegisterInfo.cpp - MIPS16 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 MIPS16 implementation of the TargetRegisterInfo class.
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//
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//===----------------------------------------------------------------------===//
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#include "Mips16RegisterInfo.h"
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#include "Mips.h"
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#include "Mips16InstrInfo.h"
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#include "MipsAnalyzeImmediate.h"
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#include "MipsInstrInfo.h"
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#include "MipsMachineFunction.h"
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#include "MipsSubtarget.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/MachineRegisterInfo.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DebugInfo.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/Type.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/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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using namespace llvm;
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#define DEBUG_TYPE "mips16-registerinfo"
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Mips16RegisterInfo::Mips16RegisterInfo(const MipsSubtarget &ST)
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: MipsRegisterInfo(ST) {}
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bool Mips16RegisterInfo::requiresRegisterScavenging
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(const MachineFunction &MF) const {
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return false;
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}
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bool Mips16RegisterInfo::requiresFrameIndexScavenging
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(const MachineFunction &MF) const {
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return false;
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}
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bool Mips16RegisterInfo::useFPForScavengingIndex
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(const MachineFunction &MF) const {
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return false;
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}
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bool Mips16RegisterInfo::saveScavengerRegister
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(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I,
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MachineBasicBlock::iterator &UseMI,
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const TargetRegisterClass *RC,
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unsigned Reg) const {
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DebugLoc DL;
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const TargetInstrInfo &TII = *MBB.getParent()->getTarget().getInstrInfo();
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TII.copyPhysReg(MBB, I, DL, Mips::T0, Reg, true);
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TII.copyPhysReg(MBB, UseMI, DL, Reg, Mips::T0, true);
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return true;
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}
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const TargetRegisterClass *
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Mips16RegisterInfo::intRegClass(unsigned Size) const {
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assert(Size == 4);
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return &Mips::CPU16RegsRegClass;
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}
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void Mips16RegisterInfo::eliminateFI(MachineBasicBlock::iterator II,
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unsigned OpNo, int FrameIndex,
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uint64_t StackSize,
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int64_t SPOffset) const {
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MachineInstr &MI = *II;
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MachineFunction &MF = *MI.getParent()->getParent();
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MachineFrameInfo *MFI = MF.getFrameInfo();
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const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
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int MinCSFI = 0;
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int MaxCSFI = -1;
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if (CSI.size()) {
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MinCSFI = CSI[0].getFrameIdx();
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MaxCSFI = CSI[CSI.size() - 1].getFrameIdx();
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}
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// The following stack frame objects are always
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// referenced relative to $sp:
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// 1. Outgoing arguments.
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// 2. Pointer to dynamically allocated stack space.
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// 3. Locations for callee-saved registers.
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// Everything else is referenced relative to whatever register
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// getFrameRegister() returns.
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unsigned FrameReg;
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if (FrameIndex >= MinCSFI && FrameIndex <= MaxCSFI)
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FrameReg = Mips::SP;
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else {
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const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
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if (TFI->hasFP(MF)) {
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FrameReg = Mips::S0;
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}
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else {
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if ((MI.getNumOperands()> OpNo+2) && MI.getOperand(OpNo+2).isReg())
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FrameReg = MI.getOperand(OpNo+2).getReg();
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else
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FrameReg = Mips::SP;
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}
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}
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// Calculate final offset.
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// - There is no need to change the offset if the frame object
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// is one of the
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// following: an outgoing argument, pointer to a dynamically allocated
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// stack space or a $gp restore location,
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// - If the frame object is any of the following,
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// its offset must be adjusted
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// by adding the size of the stack:
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// incoming argument, callee-saved register location or local variable.
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int64_t Offset;
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bool IsKill = false;
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Offset = SPOffset + (int64_t)StackSize;
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Offset += MI.getOperand(OpNo + 1).getImm();
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DEBUG(errs() << "Offset : " << Offset << "\n" << "<--------->\n");
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if (!MI.isDebugValue() &&
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!Mips16InstrInfo::validImmediate(MI.getOpcode(), FrameReg, Offset)) {
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MachineBasicBlock &MBB = *MI.getParent();
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DebugLoc DL = II->getDebugLoc();
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unsigned NewImm;
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const Mips16InstrInfo &TII =
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*static_cast<const Mips16InstrInfo*>(
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MBB.getParent()->getTarget().getInstrInfo());
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FrameReg = TII.loadImmediate(FrameReg, Offset, MBB, II, DL, NewImm);
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Offset = SignExtend64<16>(NewImm);
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IsKill = true;
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}
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MI.getOperand(OpNo).ChangeToRegister(FrameReg, false, false, IsKill);
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MI.getOperand(OpNo + 1).ChangeToImmediate(Offset);
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}
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