Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 193 deletions

diff --git a/gnu/llvm/lib/Transforms/IPO/GlobalSplit.cpp b/gnu/llvm/lib/Transforms/IPO/GlobalSplit.cpp
deleted file mode 100644
index 792f4b3052a..00000000000
--- a/gnu/llvm/lib/Transforms/IPO/GlobalSplit.cpp
+++ /dev/null
@@ -1,193 +0,0 @@
-//===- GlobalSplit.cpp - global variable splitter -------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This pass uses inrange annotations on GEP indices to split globals where
-// beneficial. Clang currently attaches these annotations to references to
-// virtual table globals under the Itanium ABI for the benefit of the
-// whole-program virtual call optimization and control flow integrity passes.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Transforms/IPO/GlobalSplit.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/IR/Constant.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/Function.h"
-#include "llvm/IR/GlobalValue.h"
-#include "llvm/IR/GlobalVariable.h"
-#include "llvm/IR/Intrinsics.h"
-#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/Metadata.h"
-#include "llvm/IR/Module.h"
-#include "llvm/IR/Operator.h"
-#include "llvm/IR/Type.h"
-#include "llvm/IR/User.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Transforms/IPO.h"
-#include <cstdint>
-#include <vector>
-
-using namespace llvm;
-
-static bool splitGlobal(GlobalVariable &GV) {
-  // If the address of the global is taken outside of the module, we cannot
-  // apply this transformation.
-  if (!GV.hasLocalLinkage())
-    return false;
-
-  // We currently only know how to split ConstantStructs.
-  auto *Init = dyn_cast_or_null<ConstantStruct>(GV.getInitializer());
-  if (!Init)
-    return false;
-
-  // Verify that each user of the global is an inrange getelementptr constant.
-  // From this it follows that any loads from or stores to that global must use
-  // a pointer derived from an inrange getelementptr constant, which is
-  // sufficient to allow us to apply the splitting transform.
-  for (User *U : GV.users()) {
-    if (!isa<Constant>(U))
-      return false;
-
-    auto *GEP = dyn_cast<GEPOperator>(U);
-    if (!GEP || !GEP->getInRangeIndex() || *GEP->getInRangeIndex() != 1 ||
-        !isa<ConstantInt>(GEP->getOperand(1)) ||
-        !cast<ConstantInt>(GEP->getOperand(1))->isZero() ||
-        !isa<ConstantInt>(GEP->getOperand(2)))
-      return false;
-  }
-
-  SmallVector<MDNode *, 2> Types;
-  GV.getMetadata(LLVMContext::MD_type, Types);
-
-  const DataLayout &DL = GV.getParent()->getDataLayout();
-  const StructLayout *SL = DL.getStructLayout(Init->getType());
-
-  IntegerType *Int32Ty = Type::getInt32Ty(GV.getContext());
-
-  std::vector<GlobalVariable *> SplitGlobals(Init->getNumOperands());
-  for (unsigned I = 0; I != Init->getNumOperands(); ++I) {
-    // Build a global representing this split piece.
-    auto *SplitGV =
-        new GlobalVariable(*GV.getParent(), Init->getOperand(I)->getType(),
-                           GV.isConstant(), GlobalValue::PrivateLinkage,
-                           Init->getOperand(I), GV.getName() + "." + utostr(I));
-    SplitGlobals[I] = SplitGV;
-
-    unsigned SplitBegin = SL->getElementOffset(I);
-    unsigned SplitEnd = (I == Init->getNumOperands() - 1)
-                            ? SL->getSizeInBytes()
-                            : SL->getElementOffset(I + 1);
-
-    // Rebuild type metadata, adjusting by the split offset.
-    // FIXME: See if we can use DW_OP_piece to preserve debug metadata here.
-    for (MDNode *Type : Types) {
-      uint64_t ByteOffset = cast<ConstantInt>(
-              cast<ConstantAsMetadata>(Type->getOperand(0))->getValue())
-              ->getZExtValue();
-      // Type metadata may be attached one byte after the end of the vtable, for
-      // classes without virtual methods in Itanium ABI. AFAIK, it is never
-      // attached to the first byte of a vtable. Subtract one to get the right
-      // slice.
-      // This is making an assumption that vtable groups are the only kinds of
-      // global variables that !type metadata can be attached to, and that they
-      // are either Itanium ABI vtable groups or contain a single vtable (i.e.
-      // Microsoft ABI vtables).
-      uint64_t AttachedTo = (ByteOffset == 0) ? ByteOffset : ByteOffset - 1;
-      if (AttachedTo < SplitBegin || AttachedTo >= SplitEnd)
-        continue;
-      SplitGV->addMetadata(
-          LLVMContext::MD_type,
-          *MDNode::get(GV.getContext(),
-                       {ConstantAsMetadata::get(
-                            ConstantInt::get(Int32Ty, ByteOffset - SplitBegin)),
-                        Type->getOperand(1)}));
-    }
-  }
-
-  for (User *U : GV.users()) {
-    auto *GEP = cast<GEPOperator>(U);
-    unsigned I = cast<ConstantInt>(GEP->getOperand(2))->getZExtValue();
-    if (I >= SplitGlobals.size())
-      continue;
-
-    SmallVector<Value *, 4> Ops;
-    Ops.push_back(ConstantInt::get(Int32Ty, 0));
-    for (unsigned I = 3; I != GEP->getNumOperands(); ++I)
-      Ops.push_back(GEP->getOperand(I));
-
-    auto *NewGEP = ConstantExpr::getGetElementPtr(
-        SplitGlobals[I]->getInitializer()->getType(), SplitGlobals[I], Ops,
-        GEP->isInBounds());
-    GEP->replaceAllUsesWith(NewGEP);
-  }
-
-  // Finally, remove the original global. Any remaining uses refer to invalid
-  // elements of the global, so replace with undef.
-  if (!GV.use_empty())
-    GV.replaceAllUsesWith(UndefValue::get(GV.getType()));
-  GV.eraseFromParent();
-  return true;
-}
-
-static bool splitGlobals(Module &M) {
-  // First, see if the module uses either of the llvm.type.test or
-  // llvm.type.checked.load intrinsics, which indicates that splitting globals
-  // may be beneficial.
-  Function *TypeTestFunc =
-      M.getFunction(Intrinsic::getName(Intrinsic::type_test));
-  Function *TypeCheckedLoadFunc =
-      M.getFunction(Intrinsic::getName(Intrinsic::type_checked_load));
-  if ((!TypeTestFunc || TypeTestFunc->use_empty()) &&
-      (!TypeCheckedLoadFunc || TypeCheckedLoadFunc->use_empty()))
-    return false;
-
-  bool Changed = false;
-  for (auto I = M.global_begin(); I != M.global_end();) {
-    GlobalVariable &GV = *I;
-    ++I;
-    Changed |= splitGlobal(GV);
-  }
-  return Changed;
-}
-
-namespace {
-
-struct GlobalSplit : public ModulePass {
-  static char ID;
-
-  GlobalSplit() : ModulePass(ID) {
-    initializeGlobalSplitPass(*PassRegistry::getPassRegistry());
-  }
-
-  bool runOnModule(Module &M) override {
-    if (skipModule(M))
-      return false;
-
-    return splitGlobals(M);
-  }
-};
-
-} // end anonymous namespace
-
-char GlobalSplit::ID = 0;
-
-INITIALIZE_PASS(GlobalSplit, "globalsplit", "Global splitter", false, false)
-
-ModulePass *llvm::createGlobalSplitPass() {
-  return new GlobalSplit;
-}
-
-PreservedAnalyses GlobalSplitPass::run(Module &M, ModuleAnalysisManager &AM) {
-  if (!splitGlobals(M))
-    return PreservedAnalyses::all();
-  return PreservedAnalyses::none();
-}