1 files changed, 0 insertions, 182 deletions
diff --git a/contrib/llvm/lib/Target/AMDGPU/AMDGPUAnnotateUniformValues.cpp b/contrib/llvm/lib/Target/AMDGPU/AMDGPUAnnotateUniformValues.cpp
deleted file mode 100644
index 71121ade0a49..000000000000
--- a/contrib/llvm/lib/Target/AMDGPU/AMDGPUAnnotateUniformValues.cpp
+++ /dev/null
@@ -1,182 +0,0 @@
-//===-- AMDGPUAnnotateUniformValues.cpp - ---------------------------------===//
-//
-// 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 pass adds amdgpu.uniform metadata to IR values so this information
-/// can be used during instruction selection.
-//
-//===----------------------------------------------------------------------===//
-
-#include "AMDGPU.h"
-#include "llvm/ADT/SetVector.h"
-#include "llvm/Analysis/LegacyDivergenceAnalysis.h"
-#include "llvm/Analysis/LoopInfo.h"
-#include "llvm/Analysis/MemoryDependenceAnalysis.h"
-#include "llvm/IR/IRBuilder.h"
-#include "llvm/IR/InstVisitor.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/raw_ostream.h"
-
-#define DEBUG_TYPE "amdgpu-annotate-uniform"
-
-using namespace llvm;
-
-namespace {
-
-class AMDGPUAnnotateUniformValues : public FunctionPass,
-                       public InstVisitor<AMDGPUAnnotateUniformValues> {
-  LegacyDivergenceAnalysis *DA;
-  MemoryDependenceResults *MDR;
-  LoopInfo *LI;
-  DenseMap<Value*, GetElementPtrInst*> noClobberClones;
-  bool isKernelFunc;
-
-public:
-  static char ID;
-  AMDGPUAnnotateUniformValues() :
-    FunctionPass(ID) { }
-  bool doInitialization(Module &M) override;
-  bool runOnFunction(Function &F) override;
-  StringRef getPassName() const override {
-    return "AMDGPU Annotate Uniform Values";
-  }
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.addRequired<LegacyDivergenceAnalysis>();
-    AU.addRequired<MemoryDependenceWrapperPass>();
-    AU.addRequired<LoopInfoWrapperPass>();
-    AU.setPreservesAll();
- }
-
-  void visitBranchInst(BranchInst &I);
-  void visitLoadInst(LoadInst &I);
-  bool isClobberedInFunction(LoadInst * Load);
-};
-
-} // End anonymous namespace
-
-INITIALIZE_PASS_BEGIN(AMDGPUAnnotateUniformValues, DEBUG_TYPE,
-                      "Add AMDGPU uniform metadata", false, false)
-INITIALIZE_PASS_DEPENDENCY(LegacyDivergenceAnalysis)
-INITIALIZE_PASS_DEPENDENCY(MemoryDependenceWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass)
-INITIALIZE_PASS_END(AMDGPUAnnotateUniformValues, DEBUG_TYPE,
-                    "Add AMDGPU uniform metadata", false, false)
-
-char AMDGPUAnnotateUniformValues::ID = 0;
-
-static void setUniformMetadata(Instruction *I) {
-  I->setMetadata("amdgpu.uniform", MDNode::get(I->getContext(), {}));
-}
-static void setNoClobberMetadata(Instruction *I) {
-  I->setMetadata("amdgpu.noclobber", MDNode::get(I->getContext(), {}));
-}
-
-static void DFS(BasicBlock *Root, SetVector<BasicBlock*> & Set) {
-  for (auto I : predecessors(Root))
-    if (Set.insert(I))
-      DFS(I, Set);
-}
-
-bool AMDGPUAnnotateUniformValues::isClobberedInFunction(LoadInst * Load) {
-  // 1. get Loop for the Load->getparent();
-  // 2. if it exists, collect all the BBs from the most outer
-  // loop and check for the writes. If NOT - start DFS over all preds.
-  // 3. Start DFS over all preds from the most outer loop header.
-  SetVector<BasicBlock *> Checklist;
-  BasicBlock *Start = Load->getParent();
-  Checklist.insert(Start);
-  const Value *Ptr = Load->getPointerOperand();
-  const Loop *L = LI->getLoopFor(Start);
-  if (L) {
-    const Loop *P = L;
-    do {
-      L = P;
-      P = P->getParentLoop();
-    } while (P);
-    Checklist.insert(L->block_begin(), L->block_end());
-    Start = L->getHeader();
-  }
-
-  DFS(Start, Checklist);
-  for (auto &BB : Checklist) {
-    BasicBlock::iterator StartIt = (!L && (BB == Load->getParent())) ?
-      BasicBlock::iterator(Load) : BB->end();
-    auto Q = MDR->getPointerDependencyFrom(MemoryLocation(Ptr), true,
-                                           StartIt, BB, Load);
-    if (Q.isClobber() || Q.isUnknown())
-      return true;
-  }
-  return false;
-}
-
-void AMDGPUAnnotateUniformValues::visitBranchInst(BranchInst &I) {
-  if (DA->isUniform(&I))
-    setUniformMetadata(I.getParent()->getTerminator());
-}
-
-void AMDGPUAnnotateUniformValues::visitLoadInst(LoadInst &I) {
-  Value *Ptr = I.getPointerOperand();
-  if (!DA->isUniform(Ptr))
-    return;
-  auto isGlobalLoad = [&](LoadInst &Load)->bool {
-    return Load.getPointerAddressSpace() == AMDGPUAS::GLOBAL_ADDRESS;
-  };
-  // We're tracking up to the Function boundaries
-  // We cannot go beyond because of FunctionPass restrictions
-  // Thus we can ensure that memory not clobbered for memory
-  // operations that live in kernel only.
-  bool NotClobbered = isKernelFunc &&   !isClobberedInFunction(&I);
-  Instruction *PtrI = dyn_cast<Instruction>(Ptr);
-  if (!PtrI && NotClobbered && isGlobalLoad(I)) {
-    if (isa<Argument>(Ptr) || isa<GlobalValue>(Ptr)) {
-      // Lookup for the existing GEP
-      if (noClobberClones.count(Ptr)) {
-        PtrI = noClobberClones[Ptr];
-      } else {
-        // Create GEP of the Value
-        Function *F = I.getParent()->getParent();
-        Value *Idx = Constant::getIntegerValue(
-          Type::getInt32Ty(Ptr->getContext()), APInt(64, 0));
-        // Insert GEP at the entry to make it dominate all uses
-        PtrI = GetElementPtrInst::Create(
-          Ptr->getType()->getPointerElementType(), Ptr,
-          ArrayRef<Value*>(Idx), Twine(""), F->getEntryBlock().getFirstNonPHI());
-      }
-      I.replaceUsesOfWith(Ptr, PtrI);
-    }
-  }
-
-  if (PtrI) {
-    setUniformMetadata(PtrI);
-    if (NotClobbered)
-      setNoClobberMetadata(PtrI);
-  }
-}
-
-bool AMDGPUAnnotateUniformValues::doInitialization(Module &M) {
-  return false;
-}
-
-bool AMDGPUAnnotateUniformValues::runOnFunction(Function &F) {
-  if (skipFunction(F))
-    return false;
-
-  DA  = &getAnalysis<LegacyDivergenceAnalysis>();
-  MDR = &getAnalysis<MemoryDependenceWrapperPass>().getMemDep();
-  LI  = &getAnalysis<LoopInfoWrapperPass>().getLoopInfo();
-  isKernelFunc = F.getCallingConv() == CallingConv::AMDGPU_KERNEL;
-
-  visit(F);
-  noClobberClones.clear();
-  return true;
-}
-
-FunctionPass *
-llvm::createAMDGPUAnnotateUniformValues() {
-  return new AMDGPUAnnotateUniformValues();
-}