Imported Upstream version 5.18.0.247

Former-commit-id: 2d6af2e4ed0eda5cbdc2946446ef7718456ad190

external/llvm/lib/CodeGen/FuncletLayout.cpp

@@ -1,59 +0,0 @@
-//===-- FuncletLayout.cpp - Contiguously lay out funclets -----------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements basic block placement transformations which result in
-// funclets being contiguous.
-//
-//===----------------------------------------------------------------------===//
-#include "llvm/CodeGen/Analysis.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/Passes.h"
-using namespace llvm;
-
-#define DEBUG_TYPE "funclet-layout"
-
-namespace {
-class FuncletLayout : public MachineFunctionPass {
-public:
-  static char ID; // Pass identification, replacement for typeid
-  FuncletLayout() : MachineFunctionPass(ID) {
-    initializeFuncletLayoutPass(*PassRegistry::getPassRegistry());
-  }
-
-  bool runOnMachineFunction(MachineFunction &F) override;
-  MachineFunctionProperties getRequiredProperties() const override {
-    return MachineFunctionProperties().set(
-        MachineFunctionProperties::Property::NoVRegs);
-  }
-};
-}
-
-char FuncletLayout::ID = 0;
-char &llvm::FuncletLayoutID = FuncletLayout::ID;
-INITIALIZE_PASS(FuncletLayout, DEBUG_TYPE,
-                "Contiguously Lay Out Funclets", false, false)
-
-bool FuncletLayout::runOnMachineFunction(MachineFunction &F) {
-  DenseMap<const MachineBasicBlock *, int> FuncletMembership =
-      getFuncletMembership(F);
-  if (FuncletMembership.empty())
-    return false;
-
-  F.sort([&](MachineBasicBlock &X, MachineBasicBlock &Y) {
-    auto FuncletX = FuncletMembership.find(&X);
-    auto FuncletY = FuncletMembership.find(&Y);
-    assert(FuncletX != FuncletMembership.end());
-    assert(FuncletY != FuncletMembership.end());
-    return FuncletX->second < FuncletY->second;
-  });
-
-  // Conservatively assume we changed something.
-  return true;
-}