Imported Upstream version 5.18.0.234

Former-commit-id: 8071ec1a8c5eaa9be24b41745add19297608001f

external/llvm/lib/Target/ARM/ARMMacroFusion.cpp

@@ -1,57 +0,0 @@
-//===- ARMMacroFusion.cpp - ARM Macro Fusion ----------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-/// \file This file contains the ARM implementation of the DAG scheduling
-///  mutation to pair instructions back to back.
-//
-//===----------------------------------------------------------------------===//
-
-#include "ARMMacroFusion.h"
-#include "ARMSubtarget.h"
-#include "llvm/CodeGen/MacroFusion.h"
-#include "llvm/CodeGen/TargetInstrInfo.h"
-
-namespace llvm {
-
-/// \brief Check if the instr pair, FirstMI and SecondMI, should be fused
-/// together. Given SecondMI, when FirstMI is unspecified, then check if
-/// SecondMI may be part of a fused pair at all.
-static bool shouldScheduleAdjacent(const TargetInstrInfo &TII,
-                                   const TargetSubtargetInfo &TSI,
-                                   const MachineInstr *FirstMI,
-                                   const MachineInstr &SecondMI) {
-  const ARMSubtarget &ST = static_cast<const ARMSubtarget&>(TSI);
-
-  // Assume wildcards for unspecified instrs.
-  unsigned FirstOpcode =
-    FirstMI ? FirstMI->getOpcode()
-            : static_cast<unsigned>(ARM::INSTRUCTION_LIST_END);
-  unsigned SecondOpcode = SecondMI.getOpcode();
-
-  if (ST.hasFuseAES())
-    // Fuse AES crypto operations.
-    switch(SecondOpcode) {
-    // AES encode.
-    case ARM::AESMC :
-      return FirstOpcode == ARM::AESE ||
-             FirstOpcode == ARM::INSTRUCTION_LIST_END;
-    // AES decode.
-    case ARM::AESIMC:
-      return FirstOpcode == ARM::AESD ||
-             FirstOpcode == ARM::INSTRUCTION_LIST_END;
-    }
-
-  return false;
-}
-
-std::unique_ptr<ScheduleDAGMutation> createARMMacroFusionDAGMutation () {
-  return createMacroFusionDAGMutation(shouldScheduleAdjacent);
-}
-
-} // end namespace llvm