1 files changed, 0 insertions, 195 deletions

diff --git a/contrib/llvm/lib/Analysis/CodeMetrics.cpp b/contrib/llvm/lib/Analysis/CodeMetrics.cpp
deleted file mode 100644
index 627d955c865f..000000000000
--- a/contrib/llvm/lib/Analysis/CodeMetrics.cpp
+++ /dev/null
@@ -1,195 +0,0 @@
-//===- CodeMetrics.cpp - Code cost measurements ---------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements code cost measurement utilities.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Analysis/CodeMetrics.h"
-#include "llvm/Analysis/AssumptionCache.h"
-#include "llvm/Analysis/LoopInfo.h"
-#include "llvm/Analysis/TargetTransformInfo.h"
-#include "llvm/Analysis/ValueTracking.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/Function.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/raw_ostream.h"
-
-#define DEBUG_TYPE "code-metrics"
-
-using namespace llvm;
-
-static void
-appendSpeculatableOperands(const Value *V,
-                           SmallPtrSetImpl<const Value *> &Visited,
-                           SmallVectorImpl<const Value *> &Worklist) {
-  const User *U = dyn_cast<User>(V);
-  if (!U)
-    return;
-
-  for (const Value *Operand : U->operands())
-    if (Visited.insert(Operand).second)
-      if (isSafeToSpeculativelyExecute(Operand))
-        Worklist.push_back(Operand);
-}
-
-static void completeEphemeralValues(SmallPtrSetImpl<const Value *> &Visited,
-                                    SmallVectorImpl<const Value *> &Worklist,
-                                    SmallPtrSetImpl<const Value *> &EphValues) {
-  // Note: We don't speculate PHIs here, so we'll miss instruction chains kept
-  // alive only by ephemeral values.
-
-  // Walk the worklist using an index but without caching the size so we can
-  // append more entries as we process the worklist. This forms a queue without
-  // quadratic behavior by just leaving processed nodes at the head of the
-  // worklist forever.
-  for (int i = 0; i < (int)Worklist.size(); ++i) {
-    const Value *V = Worklist[i];
-
-    assert(Visited.count(V) &&
-           "Failed to add a worklist entry to our visited set!");
-
-    // If all uses of this value are ephemeral, then so is this value.
-    if (!all_of(V->users(), [&](const User *U) { return EphValues.count(U); }))
-      continue;
-
-    EphValues.insert(V);
-    LLVM_DEBUG(dbgs() << "Ephemeral Value: " << *V << "\n");
-
-    // Append any more operands to consider.
-    appendSpeculatableOperands(V, Visited, Worklist);
-  }
-}
-
-// Find all ephemeral values.
-void CodeMetrics::collectEphemeralValues(
-    const Loop *L, AssumptionCache *AC,
-    SmallPtrSetImpl<const Value *> &EphValues) {
-  SmallPtrSet<const Value *, 32> Visited;
-  SmallVector<const Value *, 16> Worklist;
-
-  for (auto &AssumeVH : AC->assumptions()) {
-    if (!AssumeVH)
-      continue;
-    Instruction *I = cast<Instruction>(AssumeVH);
-
-    // Filter out call sites outside of the loop so we don't do a function's
-    // worth of work for each of its loops (and, in the common case, ephemeral
-    // values in the loop are likely due to @llvm.assume calls in the loop).
-    if (!L->contains(I->getParent()))
-      continue;
-
-    if (EphValues.insert(I).second)
-      appendSpeculatableOperands(I, Visited, Worklist);
-  }
-
-  completeEphemeralValues(Visited, Worklist, EphValues);
-}
-
-void CodeMetrics::collectEphemeralValues(
-    const Function *F, AssumptionCache *AC,
-    SmallPtrSetImpl<const Value *> &EphValues) {
-  SmallPtrSet<const Value *, 32> Visited;
-  SmallVector<const Value *, 16> Worklist;
-
-  for (auto &AssumeVH : AC->assumptions()) {
-    if (!AssumeVH)
-      continue;
-    Instruction *I = cast<Instruction>(AssumeVH);
-    assert(I->getParent()->getParent() == F &&
-           "Found assumption for the wrong function!");
-
-    if (EphValues.insert(I).second)
-      appendSpeculatableOperands(I, Visited, Worklist);
-  }
-
-  completeEphemeralValues(Visited, Worklist, EphValues);
-}
-
-/// Fill in the current structure with information gleaned from the specified
-/// block.
-void CodeMetrics::analyzeBasicBlock(const BasicBlock *BB,
-                                    const TargetTransformInfo &TTI,
-                                    const SmallPtrSetImpl<const Value*> &EphValues) {
-  ++NumBlocks;
-  unsigned NumInstsBeforeThisBB = NumInsts;
-  for (const Instruction &I : *BB) {
-    // Skip ephemeral values.
-    if (EphValues.count(&I))
-      continue;
-
-    // Special handling for calls.
-    if (const auto *Call = dyn_cast<CallBase>(&I)) {
-      if (const Function *F = Call->getCalledFunction()) {
-        // If a function is both internal and has a single use, then it is
-        // extremely likely to get inlined in the future (it was probably
-        // exposed by an interleaved devirtualization pass).
-        if (!Call->isNoInline() && F->hasInternalLinkage() && F->hasOneUse())
-          ++NumInlineCandidates;
-
-        // If this call is to function itself, then the function is recursive.
-        // Inlining it into other functions is a bad idea, because this is
-        // basically just a form of loop peeling, and our metrics aren't useful
-        // for that case.
-        if (F == BB->getParent())
-          isRecursive = true;
-
-        if (TTI.isLoweredToCall(F))
-          ++NumCalls;
-      } else {
-        // We don't want inline asm to count as a call - that would prevent loop
-        // unrolling. The argument setup cost is still real, though.
-        if (!Call->isInlineAsm())
-          ++NumCalls;
-      }
-    }
-
-    if (const AllocaInst *AI = dyn_cast<AllocaInst>(&I)) {
-      if (!AI->isStaticAlloca())
-        this->usesDynamicAlloca = true;
-    }
-
-    if (isa<ExtractElementInst>(I) || I.getType()->isVectorTy())
-      ++NumVectorInsts;
-
-    if (I.getType()->isTokenTy() && I.isUsedOutsideOfBlock(BB))
-      notDuplicatable = true;
-
-    if (const CallInst *CI = dyn_cast<CallInst>(&I)) {
-      if (CI->cannotDuplicate())
-        notDuplicatable = true;
-      if (CI->isConvergent())
-        convergent = true;
-    }
-
-    if (const InvokeInst *InvI = dyn_cast<InvokeInst>(&I))
-      if (InvI->cannotDuplicate())
-        notDuplicatable = true;
-
-    NumInsts += TTI.getUserCost(&I);
-  }
-
-  if (isa<ReturnInst>(BB->getTerminator()))
-    ++NumRets;
-
-  // We never want to inline functions that contain an indirectbr.  This is
-  // incorrect because all the blockaddress's (in static global initializers
-  // for example) would be referring to the original function, and this indirect
-  // jump would jump from the inlined copy of the function into the original
-  // function which is extremely undefined behavior.
-  // FIXME: This logic isn't really right; we can safely inline functions
-  // with indirectbr's as long as no other function or global references the
-  // blockaddress of a block within the current function.  And as a QOI issue,
-  // if someone is using a blockaddress without an indirectbr, and that
-  // reference somehow ends up in another function or global, we probably
-  // don't want to inline this function.
-  notDuplicatable |= isa<IndirectBrInst>(BB->getTerminator());
-
-  // Remember NumInsts for this BB.
-  NumBBInsts[BB] = NumInsts - NumInstsBeforeThisBB;
-}