Imported Upstream version 5.18.0.247

Former-commit-id: 2d6af2e4ed0eda5cbdc2946446ef7718456ad190

external/llvm/lib/CodeGen/PreISelIntrinsicLowering.cpp

@@ -1,96 +0,0 @@
-//===- PreISelIntrinsicLowering.cpp - Pre-ISel intrinsic lowering pass ----===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This pass implements IR lowering for the llvm.load.relative intrinsic.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/PreISelIntrinsicLowering.h"
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/IR/Function.h"
-#include "llvm/IR/IRBuilder.h"
-#include "llvm/IR/Instructions.h"
-#include "llvm/IR/Module.h"
-#include "llvm/IR/Type.h"
-#include "llvm/IR/User.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/Casting.h"
-
-using namespace llvm;
-
-static bool lowerLoadRelative(Function &F) {
-  if (F.use_empty())
-    return false;
-
-  bool Changed = false;
-  Type *Int32Ty = Type::getInt32Ty(F.getContext());
-  Type *Int32PtrTy = Int32Ty->getPointerTo();
-  Type *Int8Ty = Type::getInt8Ty(F.getContext());
-
-  for (auto I = F.use_begin(), E = F.use_end(); I != E;) {
-    auto CI = dyn_cast<CallInst>(I->getUser());
-    ++I;
-    if (!CI || CI->getCalledValue() != &F)
-      continue;
-
-    IRBuilder<> B(CI);
-    Value *OffsetPtr =
-        B.CreateGEP(Int8Ty, CI->getArgOperand(0), CI->getArgOperand(1));
-    Value *OffsetPtrI32 = B.CreateBitCast(OffsetPtr, Int32PtrTy);
-    Value *OffsetI32 = B.CreateAlignedLoad(OffsetPtrI32, 4);
-
-    Value *ResultPtr = B.CreateGEP(Int8Ty, CI->getArgOperand(0), OffsetI32);
-
-    CI->replaceAllUsesWith(ResultPtr);
-    CI->eraseFromParent();
-    Changed = true;
-  }
-
-  return Changed;
-}
-
-static bool lowerIntrinsics(Module &M) {
-  bool Changed = false;
-  for (Function &F : M) {
-    if (F.getName().startswith("llvm.load.relative."))
-      Changed |= lowerLoadRelative(F);
-  }
-  return Changed;
-}
-
-namespace {
-
-class PreISelIntrinsicLoweringLegacyPass : public ModulePass {
-public:
-  static char ID;
-
-  PreISelIntrinsicLoweringLegacyPass() : ModulePass(ID) {}
-
-  bool runOnModule(Module &M) override { return lowerIntrinsics(M); }
-};
-
-} // end anonymous namespace
-
-char PreISelIntrinsicLoweringLegacyPass::ID;
-
-INITIALIZE_PASS(PreISelIntrinsicLoweringLegacyPass,
-                "pre-isel-intrinsic-lowering", "Pre-ISel Intrinsic Lowering",
-                false, false)
-
-ModulePass *llvm::createPreISelIntrinsicLoweringPass() {
-  return new PreISelIntrinsicLoweringLegacyPass;
-}
-
-PreservedAnalyses PreISelIntrinsicLoweringPass::run(Module &M,
-                                                    ModuleAnalysisManager &AM) {
-  if (!lowerIntrinsics(M))
-    return PreservedAnalyses::all();
-  else
-    return PreservedAnalyses::none();
-}