Revert r331816 and r331820 - [globalisel] Add a combiner helpers for extending loads and use them in a pre-legalize combiner for AArch64

Reverting this to see if the clang-cmake-aarch64-global-isel and
clang-cmake-aarch64-quick bots are failing because of this commit.
We know it wasn't r331819.

llvm-svn: 331846

1 files changed, 0 insertions, 104 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64PreLegalizerCombiner.cpp b/llvm/lib/Target/AArch64/AArch64PreLegalizerCombiner.cpp
deleted file mode 100644
index 2a0692b888a..00000000000
--- a/llvm/lib/Target/AArch64/AArch64PreLegalizerCombiner.cpp
+++ /dev/null
@@ -1,104 +0,0 @@
-//=== lib/CodeGen/GlobalISel/AArch64PreLegalizerCombiner.cpp --------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This pass does combining of machine instructions at the generic MI level,
-// before the legalizer.
-//
-//===----------------------------------------------------------------------===//
-
-#include "AArch64TargetMachine.h"
-#include "llvm/CodeGen/GlobalISel/Combiner.h"
-#include "llvm/CodeGen/GlobalISel/CombinerHelper.h"
-#include "llvm/CodeGen/GlobalISel/CombinerInfo.h"
-#include "llvm/CodeGen/GlobalISel/MIPatternMatch.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/TargetPassConfig.h"
-#include "llvm/Support/Debug.h"
-
-#define DEBUG_TYPE "aarch64-prelegalizer-combiner"
-
-using namespace llvm;
-using namespace MIPatternMatch;
-
-namespace {
-class AArch64PreLegalizerCombinerInfo : public CombinerInfo {
-public:
-  AArch64PreLegalizerCombinerInfo()
-      : CombinerInfo(/*AllowIllegalOps*/ true, /*ShouldLegalizeIllegal*/ false,
-                     /*LegalizerInfo*/ nullptr) {}
-  virtual bool combine(MachineInstr &MI, MachineIRBuilder &B) const override;
-};
-
-bool AArch64PreLegalizerCombinerInfo::combine(MachineInstr &MI,
-                                              MachineIRBuilder &B) const {
-  CombinerHelper Helper(B);
-
-  switch (MI.getOpcode()) {
-  default:
-    return false;
-  case TargetOpcode::G_ANYEXT:
-  case TargetOpcode::G_SEXT:
-  case TargetOpcode::G_ZEXT:
-    return Helper.tryCombineExtendingLoads(MI);
-  }
-
-  return false;
-}
-
-// Pass boilerplate
-// ================
-
-class AArch64PreLegalizerCombiner : public MachineFunctionPass {
-public:
-  static char ID;
-
-  AArch64PreLegalizerCombiner();
-
-  StringRef getPassName() const override { return "AArch64PreLegalizerCombiner"; }
-
-  bool runOnMachineFunction(MachineFunction &MF) override;
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override;
-};
-}
-
-void AArch64PreLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
-  AU.addRequired<TargetPassConfig>();
-  MachineFunctionPass::getAnalysisUsage(AU);
-}
-
-AArch64PreLegalizerCombiner::AArch64PreLegalizerCombiner() : MachineFunctionPass(ID) {
-  initializeAArch64PreLegalizerCombinerPass(*PassRegistry::getPassRegistry());
-}
-
-bool AArch64PreLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
-  if (MF.getProperties().hasProperty(
-          MachineFunctionProperties::Property::FailedISel))
-    return false;
-  auto *TPC = &getAnalysis<TargetPassConfig>();
-  AArch64PreLegalizerCombinerInfo PCInfo;
-  Combiner C(PCInfo, TPC);
-  return C.combineMachineInstrs(MF);
-}
-
-char AArch64PreLegalizerCombiner::ID = 0;
-INITIALIZE_PASS_BEGIN(AArch64PreLegalizerCombiner, DEBUG_TYPE,
-                      "Combine AArch64 machine instrs before legalization",
-                      false, false)
-INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_END(AArch64PreLegalizerCombiner, DEBUG_TYPE,
-                    "Combine AArch64 machine instrs before legalization", false,
-                    false)
-
-
-namespace llvm {
-FunctionPass *createAArch64PreLegalizeCombiner() {
-  return new AArch64PreLegalizerCombiner();
-}
-} // end namespace llvm