1 files changed, 0 insertions, 208 deletions

diff --git a/contrib/llvm/lib/CodeGen/RegUsageInfoCollector.cpp b/contrib/llvm/lib/CodeGen/RegUsageInfoCollector.cpp
deleted file mode 100644
index b37dfada7101f..0000000000000
--- a/contrib/llvm/lib/CodeGen/RegUsageInfoCollector.cpp
+++ /dev/null
@@ -1,208 +0,0 @@
-//===-- RegUsageInfoCollector.cpp - Register Usage Information Collector --===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-///
-/// This pass is required to take advantage of the interprocedural register
-/// allocation infrastructure.
-///
-/// This pass is simple MachineFunction pass which collects register usage
-/// details by iterating through each physical registers and checking
-/// MRI::isPhysRegUsed() then creates a RegMask based on this details.
-/// The pass then stores this RegMask in PhysicalRegisterUsageInfo.cpp
-///
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/Statistic.h"
-#include "llvm/CodeGen/MachineBasicBlock.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/CodeGen/MachineOperand.h"
-#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/CodeGen/RegisterUsageInfo.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/CodeGen/TargetFrameLowering.h"
-
-using namespace llvm;
-
-#define DEBUG_TYPE "ip-regalloc"
-
-STATISTIC(NumCSROpt,
-          "Number of functions optimized for callee saved registers");
-
-namespace {
-
-class RegUsageInfoCollector : public MachineFunctionPass {
-public:
-  RegUsageInfoCollector() : MachineFunctionPass(ID) {
-    PassRegistry &Registry = *PassRegistry::getPassRegistry();
-    initializeRegUsageInfoCollectorPass(Registry);
-  }
-
-  StringRef getPassName() const override {
-    return "Register Usage Information Collector Pass";
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.addRequired<PhysicalRegisterUsageInfo>();
-    AU.setPreservesAll();
-    MachineFunctionPass::getAnalysisUsage(AU);
-  }
-
-  bool runOnMachineFunction(MachineFunction &MF) override;
-
-  // Call determineCalleeSaves and then also set the bits for subregs and
-  // fully saved superregs.
-  static void computeCalleeSavedRegs(BitVector &SavedRegs, MachineFunction &MF);
-
-  static char ID;
-};
-
-} // end of anonymous namespace
-
-char RegUsageInfoCollector::ID = 0;
-
-INITIALIZE_PASS_BEGIN(RegUsageInfoCollector, "RegUsageInfoCollector",
-                      "Register Usage Information Collector", false, false)
-INITIALIZE_PASS_DEPENDENCY(PhysicalRegisterUsageInfo)
-INITIALIZE_PASS_END(RegUsageInfoCollector, "RegUsageInfoCollector",
-                    "Register Usage Information Collector", false, false)
-
-FunctionPass *llvm::createRegUsageInfoCollector() {
-  return new RegUsageInfoCollector();
-}
-
-// TODO: Move to hook somwehere?
-
-// Return true if it is useful to track the used registers for IPRA / no CSR
-// optimizations. This is not useful for entry points, and computing the
-// register usage information is expensive.
-static bool isCallableFunction(const MachineFunction &MF) {
-  switch (MF.getFunction().getCallingConv()) {
-  case CallingConv::AMDGPU_VS:
-  case CallingConv::AMDGPU_GS:
-  case CallingConv::AMDGPU_PS:
-  case CallingConv::AMDGPU_CS:
-  case CallingConv::AMDGPU_HS:
-  case CallingConv::AMDGPU_ES:
-  case CallingConv::AMDGPU_LS:
-  case CallingConv::AMDGPU_KERNEL:
-    return false;
-  default:
-    return true;
-  }
-}
-
-bool RegUsageInfoCollector::runOnMachineFunction(MachineFunction &MF) {
-  MachineRegisterInfo *MRI = &MF.getRegInfo();
-  const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
-  const LLVMTargetMachine &TM = MF.getTarget();
-
-  LLVM_DEBUG(dbgs() << " -------------------- " << getPassName()
-                    << " -------------------- \nFunction Name : "
-                    << MF.getName() << '\n');
-
-  // Analyzing the register usage may be expensive on some targets.
-  if (!isCallableFunction(MF)) {
-    LLVM_DEBUG(dbgs() << "Not analyzing non-callable function\n");
-    return false;
-  }
-
-  // If there are no callers, there's no point in computing more precise
-  // register usage here.
-  if (MF.getFunction().use_empty()) {
-    LLVM_DEBUG(dbgs() << "Not analyzing function with no callers\n");
-    return false;
-  }
-
-  std::vector<uint32_t> RegMask;
-
-  // Compute the size of the bit vector to represent all the registers.
-  // The bit vector is broken into 32-bit chunks, thus takes the ceil of
-  // the number of registers divided by 32 for the size.
-  unsigned RegMaskSize = MachineOperand::getRegMaskSize(TRI->getNumRegs());
-  RegMask.resize(RegMaskSize, ~((uint32_t)0));
-
-  const Function &F = MF.getFunction();
-
-  PhysicalRegisterUsageInfo &PRUI = getAnalysis<PhysicalRegisterUsageInfo>();
-  PRUI.setTargetMachine(TM);
-
-  LLVM_DEBUG(dbgs() << "Clobbered Registers: ");
-
-  BitVector SavedRegs;
-  computeCalleeSavedRegs(SavedRegs, MF);
-
-  const BitVector &UsedPhysRegsMask = MRI->getUsedPhysRegsMask();
-  auto SetRegAsDefined = [&RegMask] (unsigned Reg) {
-    RegMask[Reg / 32] &= ~(1u << Reg % 32);
-  };
-  // Scan all the physical registers. When a register is defined in the current
-  // function set it and all the aliasing registers as defined in the regmask.
-  // FIXME: Rewrite to use regunits.
-  for (unsigned PReg = 1, PRegE = TRI->getNumRegs(); PReg < PRegE; ++PReg) {
-    // Don't count registers that are saved and restored.
-    if (SavedRegs.test(PReg))
-      continue;
-    // If a register is defined by an instruction mark it as defined together
-    // with all it's unsaved aliases.
-    if (!MRI->def_empty(PReg)) {
-      for (MCRegAliasIterator AI(PReg, TRI, true); AI.isValid(); ++AI)
-        if (!SavedRegs.test(*AI))
-          SetRegAsDefined(*AI);
-      continue;
-    }
-    // If a register is in the UsedPhysRegsMask set then mark it as defined.
-    // All clobbered aliases will also be in the set, so we can skip setting
-    // as defined all the aliases here.
-    if (UsedPhysRegsMask.test(PReg))
-      SetRegAsDefined(PReg);
-  }
-
-  if (TargetFrameLowering::isSafeForNoCSROpt(F)) {
-    ++NumCSROpt;
-    LLVM_DEBUG(dbgs() << MF.getName()
-                      << " function optimized for not having CSR.\n");
-  }
-
-  LLVM_DEBUG(
-    for (unsigned PReg = 1, PRegE = TRI->getNumRegs(); PReg < PRegE; ++PReg) {
-      if (MachineOperand::clobbersPhysReg(&(RegMask[0]), PReg))
-        dbgs() << printReg(PReg, TRI) << " ";
-    }
-
-    dbgs() << " \n----------------------------------------\n";
-  );
-
-  PRUI.storeUpdateRegUsageInfo(F, RegMask);
-
-  return false;
-}
-
-void RegUsageInfoCollector::
-computeCalleeSavedRegs(BitVector &SavedRegs, MachineFunction &MF) {
-  const TargetFrameLowering &TFI = *MF.getSubtarget().getFrameLowering();
-  const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
-
-  // Target will return the set of registers that it saves/restores as needed.
-  SavedRegs.clear();
-  TFI.determineCalleeSaves(MF, SavedRegs);
-  if (SavedRegs.none())
-    return;
-
-  // Insert subregs.
-  const MCPhysReg *CSRegs = TRI.getCalleeSavedRegs(&MF);
-  for (unsigned i = 0; CSRegs[i]; ++i) {
-    MCPhysReg Reg = CSRegs[i];
-    if (SavedRegs.test(Reg)) {
-      // Save subregisters
-      for (MCSubRegIterator SR(Reg, &TRI); SR.isValid(); ++SR)
-        SavedRegs.set(*SR);
-    }
-  }
-}