Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/lib/CodeGen/ExpandISelPseudos.cpp

@@ -1,74 +0,0 @@
-//===-- llvm/CodeGen/ExpandISelPseudos.cpp ----------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// Expand Pseudo-instructions produced by ISel. These are usually to allow
-// the expansion to contain control flow, such as a conditional move
-// implemented with a conditional branch and a phi, or an atomic operation
-// implemented with a loop.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/CodeGen/TargetLowering.h"
-#include "llvm/CodeGen/TargetSubtargetInfo.h"
-#include "llvm/Support/Debug.h"
-using namespace llvm;
-
-#define DEBUG_TYPE "expand-isel-pseudos"
-
-namespace {
-  class ExpandISelPseudos : public MachineFunctionPass {
-  public:
-    static char ID; // Pass identification, replacement for typeid
-    ExpandISelPseudos() : MachineFunctionPass(ID) {}
-
-  private:
-    bool runOnMachineFunction(MachineFunction &MF) override;
-
-    void getAnalysisUsage(AnalysisUsage &AU) const override {
-      MachineFunctionPass::getAnalysisUsage(AU);
-    }
-  };
-} // end anonymous namespace
-
-char ExpandISelPseudos::ID = 0;
-char &llvm::ExpandISelPseudosID = ExpandISelPseudos::ID;
-INITIALIZE_PASS(ExpandISelPseudos, DEBUG_TYPE,
-                "Expand ISel Pseudo-instructions", false, false)
-
-bool ExpandISelPseudos::runOnMachineFunction(MachineFunction &MF) {
-  bool Changed = false;
-  const TargetLowering *TLI = MF.getSubtarget().getTargetLowering();
-
-  // Iterate through each instruction in the function, looking for pseudos.
-  for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) {
-    MachineBasicBlock *MBB = &*I;
-    for (MachineBasicBlock::iterator MBBI = MBB->begin(), MBBE = MBB->end();
-         MBBI != MBBE; ) {
-      MachineInstr &MI = *MBBI++;
-
-      // If MI is a pseudo, expand it.
-      if (MI.usesCustomInsertionHook()) {
-        Changed = true;
-        MachineBasicBlock *NewMBB = TLI->EmitInstrWithCustomInserter(MI, MBB);
-        // The expansion may involve new basic blocks.
-        if (NewMBB != MBB) {
-          MBB = NewMBB;
-          I = NewMBB->getIterator();
-          MBBI = NewMBB->begin();
-          MBBE = NewMBB->end();
-        }
-      }
-    }
-  }
-
-  return Changed;
-}