Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/lib/Target/PowerPC/PPCPreEmitPeephole.cpp

@@ -1,95 +0,0 @@
-//===--------- PPCPreEmitPeephole.cpp - Late peephole optimizations -------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// A pre-emit peephole for catching opportunities introduced by late passes such
-// as MachineBlockPlacement.
-//
-//===----------------------------------------------------------------------===//
-
-#include "PPC.h"
-#include "PPCInstrInfo.h"
-#include "PPCSubtarget.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/CodeGen/LivePhysRegs.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/Support/Debug.h"
-
-using namespace llvm;
-
-#define DEBUG_TYPE "ppc-pre-emit-peephole"
-
-STATISTIC(NumRRConvertedInPreEmit,
-          "Number of r+r instructions converted to r+i in pre-emit peephole");
-STATISTIC(NumRemovedInPreEmit,
-          "Number of instructions deleted in pre-emit peephole");
-
-static cl::opt<bool>
-RunPreEmitPeephole("ppc-late-peephole", cl::Hidden, cl::init(true),
-                   cl::desc("Run pre-emit peephole optimizations."));
-
-namespace {
-  class PPCPreEmitPeephole : public MachineFunctionPass {
-  public:
-    static char ID;
-    PPCPreEmitPeephole() : MachineFunctionPass(ID) {
-      initializePPCPreEmitPeepholePass(*PassRegistry::getPassRegistry());
-    }
-
-    void getAnalysisUsage(AnalysisUsage &AU) const override {
-      MachineFunctionPass::getAnalysisUsage(AU);
-    }
-
-    MachineFunctionProperties getRequiredProperties() const override {
-      return MachineFunctionProperties().set(
-          MachineFunctionProperties::Property::NoVRegs);
-    }
-
-    bool runOnMachineFunction(MachineFunction &MF) override {
-      if (skipFunction(MF.getFunction()) || !RunPreEmitPeephole)
-        return false;
-      bool Changed = false;
-      const PPCInstrInfo *TII = MF.getSubtarget<PPCSubtarget>().getInstrInfo();
-      SmallVector<MachineInstr *, 4> InstrsToErase;
-      for (MachineBasicBlock &MBB : MF) {
-        for (MachineInstr &MI : MBB) {
-          MachineInstr *DefMIToErase = nullptr;
-          if (TII->convertToImmediateForm(MI, &DefMIToErase)) {
-            Changed = true;
-            NumRRConvertedInPreEmit++;
-            DEBUG(dbgs() << "Converted instruction to imm form: ");
-            DEBUG(MI.dump());
-            if (DefMIToErase) {
-              InstrsToErase.push_back(DefMIToErase);
-            }
-          }
-        }
-      }
-      for (MachineInstr *MI : InstrsToErase) {
-        DEBUG(dbgs() << "PPC pre-emit peephole: erasing instruction: ");
-        DEBUG(MI->dump());
-        MI->eraseFromParent();
-        NumRemovedInPreEmit++;
-      }
-      return Changed;
-    }
-  };
-}
-
-INITIALIZE_PASS(PPCPreEmitPeephole, DEBUG_TYPE, "PowerPC Pre-Emit Peephole",
-                false, false)
-char PPCPreEmitPeephole::ID = 0;
-
-FunctionPass *llvm::createPPCPreEmitPeepholePass() {
-  return new PPCPreEmitPeephole();
-}