1 files changed, 0 insertions, 97 deletions
diff --git a/contrib/llvm/lib/CodeGen/PostRAHazardRecognizer.cpp b/contrib/llvm/lib/CodeGen/PostRAHazardRecognizer.cpp
deleted file mode 100644
index 0a3838617bc5..000000000000
--- a/contrib/llvm/lib/CodeGen/PostRAHazardRecognizer.cpp
+++ /dev/null
@@ -1,97 +0,0 @@
-//===----- PostRAHazardRecognizer.cpp - hazard recognizer -----------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-/// \file
-/// This runs the hazard recognizer and emits noops when necessary.  This
-/// gives targets a way to run the hazard recognizer without running one of
-/// the schedulers.  Example use cases for this pass would be:
-///
-/// - Targets that need the hazard recognizer to be run at -O0.
-/// - Targets that want to guarantee that hazards at the beginning of
-///   scheduling regions are handled correctly.  The post-RA scheduler is
-///   a top-down scheduler, but when there are multiple scheduling regions
-///   in a basic block, it visits the regions in bottom-up order.  This
-///   makes it impossible for the scheduler to gauranttee it can correctly
-///   handle hazards at the beginning of scheduling regions.
-///
-/// This pass traverses all the instructions in a program in top-down order.
-/// In contrast to the instruction scheduling passes, this pass never resets
-/// the hazard recognizer to ensure it can correctly handles noop hazards at
-/// the beginning of blocks.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/Statistic.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/CodeGen/ScheduleHazardRecognizer.h"
-#include "llvm/CodeGen/TargetInstrInfo.h"
-#include "llvm/CodeGen/TargetSubtargetInfo.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/raw_ostream.h"
-using namespace llvm;
-
-#define DEBUG_TYPE "post-RA-hazard-rec"
-
-STATISTIC(NumNoops, "Number of noops inserted");
-
-namespace {
-  class PostRAHazardRecognizer : public MachineFunctionPass {
-
-  public:
-    static char ID;
-    PostRAHazardRecognizer() : MachineFunctionPass(ID) {}
-
-    void getAnalysisUsage(AnalysisUsage &AU) const override {
-      AU.setPreservesCFG();
-      MachineFunctionPass::getAnalysisUsage(AU);
-    }
-
-    bool runOnMachineFunction(MachineFunction &Fn) override;
-
-  };
-  char PostRAHazardRecognizer::ID = 0;
-
-}
-
-char &llvm::PostRAHazardRecognizerID = PostRAHazardRecognizer::ID;
-
-INITIALIZE_PASS(PostRAHazardRecognizer, DEBUG_TYPE,
-                "Post RA hazard recognizer", false, false)
-
-bool PostRAHazardRecognizer::runOnMachineFunction(MachineFunction &Fn) {
-  const TargetInstrInfo *TII = Fn.getSubtarget().getInstrInfo();
-  std::unique_ptr<ScheduleHazardRecognizer> HazardRec(
-      TII->CreateTargetPostRAHazardRecognizer(Fn));
-
-  // Return if the target has not implemented a hazard recognizer.
-  if (!HazardRec.get())
-    return false;
-
-  // Loop over all of the basic blocks
-  for (auto &MBB : Fn) {
-    // We do not call HazardRec->reset() here to make sure we are handling noop
-    // hazards at the start of basic blocks.
-    for (MachineInstr &MI : MBB) {
-      // If we need to emit noops prior to this instruction, then do so.
-      unsigned NumPreNoops = HazardRec->PreEmitNoops(&MI);
-      for (unsigned i = 0; i != NumPreNoops; ++i) {
-        HazardRec->EmitNoop();
-        TII->insertNoop(MBB, MachineBasicBlock::iterator(MI));
-        ++NumNoops;
-      }
-
-      HazardRec->EmitInstruction(&MI);
-      if (HazardRec->atIssueLimit()) {
-        HazardRec->AdvanceCycle();
-      }
-    }
-  }
-  return true;
-}