[llvm][clang] Remove uses of isOpaquePointerTy() (NFC)

This now always returns true (for pointer types).

clang/lib/CodeGen/CGCall.h

@@ -109,9 +109,6 @@ class CGCallee {
     AbstractInfo = abstractInfo;
     assert(functionPtr && "configuring callee without function pointer");
     assert(functionPtr->getType()->isPointerTy());
-    assert(functionPtr->getType()->isOpaquePointerTy() ||
-           functionPtr->getType()->getNonOpaquePointerElementType()
-               ->isFunctionTy());
   }
 
   static CGCallee forBuiltin(unsigned builtinID,

llvm/lib/Analysis/InstructionSimplify.cpp

@@ -4888,10 +4888,8 @@ static Value *simplifyGEPInst(Type *SrcTy, Value *Ptr,
     }
   }
 
-  // For opaque pointers an all-zero GEP is a no-op. For typed pointers,
-  // it may be equivalent to a bitcast.
-  if (Ptr->getType()->getScalarType()->isOpaquePointerTy() &&
-      Ptr->getType() == GEPTy &&
+  // All-zero GEP is a no-op, unless it performs a vector splat.
+  if (Ptr->getType() == GEPTy &&
       all_of(Indices, [](const auto *V) { return match(V, m_Zero()); }))
     return Ptr;
 

llvm/lib/AsmParser/LLParser.cpp

@@ -2675,7 +2675,7 @@ bool LLParser::parseType(Type *&Result, const Twine &Msg, bool AllowVoid) {
     // Handle "ptr" opaque pointer type.
     //
     // Type ::= ptr ('addrspace' '(' uint32 ')')?
-    if (Result->isOpaquePointerTy()) {
+    if (Result->isPointerTy()) {
       unsigned AddrSpace;
       if (parseOptionalAddrSpace(AddrSpace))
         return true;

llvm/lib/Bitcode/Reader/BitcodeReader.cpp

@@ -1381,17 +1381,6 @@ unsigned BitcodeReader::getVirtualTypeID(Type *Ty,
     return It->second;
   }
 
-#ifndef NDEBUG
-  if (!Ty->isOpaquePointerTy()) {
-    assert(Ty->getNumContainedTypes() == ChildTypeIDs.size() &&
-           "Wrong number of contained types");
-    for (auto Pair : zip(Ty->subtypes(), ChildTypeIDs)) {
-      assert(std::get<0>(Pair) == getTypeByID(std::get<1>(Pair)) &&
-             "Incorrect contained type ID");
-    }
-  }
-#endif
-
   unsigned TypeID = TypeList.size();
   TypeList.push_back(Ty);
   if (!ChildTypeIDs.empty())

llvm/lib/FuzzMutate/Operations.cpp

@@ -196,9 +196,7 @@ OpDescriptor llvm::fuzzerop::gepDescriptor(unsigned Weight) {
   auto buildGEP = [](ArrayRef<Value *> Srcs, Instruction *Inst) {
     // TODO: It would be better to generate a random type here, rather than
     // generating a random value and picking its type.
-    Type *Ty = Srcs[0]->getType()->isOpaquePointerTy()
-                   ? Srcs[1]->getType()
-                   : Srcs[0]->getType()->getNonOpaquePointerElementType();
+    Type *Ty = Srcs[1]->getType();
     auto Indices = ArrayRef(Srcs).drop_front(2);
     return GetElementPtrInst::Create(Ty, Srcs[0], Indices, "G", Inst);
   };

llvm/lib/FuzzMutate/RandomIRBuilder.cpp

@@ -211,10 +211,8 @@ Value *RandomIRBuilder::newSource(BasicBlock &BB, ArrayRef<Instruction *> Insts,
       IP = ++I->getIterator();
       assert(IP != BB.end() && "guaranteed by the findPointer");
     }
-    // For opaque pointers, pick the type independently.
-    Type *AccessTy = Ptr->getType()->isOpaquePointerTy()
-                         ? RS.getSelection()->getType()
-                         : Ptr->getType()->getNonOpaquePointerElementType();
+    // Pick the type independently.
+    Type *AccessTy = RS.getSelection()->getType();
     auto *NewLoad = new LoadInst(AccessTy, Ptr, "L", &*IP);
 
     // Only sample this load if it really matches the descriptor

llvm/lib/IR/Core.cpp

@@ -793,7 +793,7 @@ LLVMTypeRef LLVMPointerType(LLVMTypeRef ElementType, unsigned AddressSpace) {
 }
 
 LLVMBool LLVMPointerTypeIsOpaque(LLVMTypeRef Ty) {
-  return unwrap(Ty)->isOpaquePointerTy();
+  return true;
 }
 
 LLVMTypeRef LLVMVectorType(LLVMTypeRef ElementType, unsigned ElementCount) {

llvm/lib/Transforms/Coroutines/Coroutines.cpp

@@ -596,20 +596,6 @@ static void checkAsyncFuncPointer(const Instruction *I, Value *V) {
   auto *AsyncFuncPtrAddr = dyn_cast<GlobalVariable>(V->stripPointerCasts());
   if (!AsyncFuncPtrAddr)
     fail(I, "llvm.coro.id.async async function pointer not a global", V);
-
-  if (AsyncFuncPtrAddr->getType()->isOpaquePointerTy())
-    return;
-
-  auto *StructTy = cast<StructType>(
-      AsyncFuncPtrAddr->getType()->getNonOpaquePointerElementType());
-  if (StructTy->isOpaque() || !StructTy->isPacked() ||
-      StructTy->getNumElements() != 2 ||
-      !StructTy->getElementType(0)->isIntegerTy(32) ||
-      !StructTy->getElementType(1)->isIntegerTy(32))
-    fail(I,
-         "llvm.coro.id.async async function pointer argument's type is not "
-         "<{i32, i32}>",
-         V);
 }
 
 void CoroIdAsyncInst::checkWellFormed() const {

llvm/lib/Transforms/Scalar/GVN.cpp

@@ -423,10 +423,9 @@ GVNPass::Expression GVNPass::ValueTable::createGEPExpr(GetElementPtrInst *GEP) {
   unsigned BitWidth = DL.getIndexTypeSizeInBits(PtrTy);
   MapVector<Value *, APInt> VariableOffsets;
   APInt ConstantOffset(BitWidth, 0);
-  if (PtrTy->isOpaquePointerTy() &&
-      GEP->collectOffset(DL, BitWidth, VariableOffsets, ConstantOffset)) {
-    // For opaque pointers, convert into offset representation, to recognize
-    // equivalent address calculations that use different type encoding.
+  if (GEP->collectOffset(DL, BitWidth, VariableOffsets, ConstantOffset)) {
+    // Convert into offset representation, to recognize equivalent address
+    // calculations that use different type encoding.
     LLVMContext &Context = GEP->getContext();
     E.opcode = GEP->getOpcode();
     E.type = nullptr;
@@ -439,8 +438,8 @@ GVNPass::Expression GVNPass::ValueTable::createGEPExpr(GetElementPtrInst *GEP) {
       E.varargs.push_back(
           lookupOrAdd(ConstantInt::get(Context, ConstantOffset)));
   } else {
-    // If converting to offset representation fails (for typed pointers and
-    // scalable vectors), fall back to type-based implementation:
+    // If converting to offset representation fails (for scalable vectors),
+    // fall back to type-based implementation:
     E.opcode = GEP->getOpcode();
     E.type = GEP->getSourceElementType();
     for (Use &Op : GEP->operands())

llvm/lib/Transforms/Scalar/SROA.cpp

@@ -1628,12 +1628,6 @@ static void speculateSelectInstLoads(SelectInst &SI, LoadInst &LI,
 
   IRB.SetInsertPoint(&LI);
 
-  if (auto *TypedPtrTy = LI.getPointerOperandType();
-      !TypedPtrTy->isOpaquePointerTy() && SI.getType() != TypedPtrTy) {
-    TV = IRB.CreateBitOrPointerCast(TV, TypedPtrTy, "");
-    FV = IRB.CreateBitOrPointerCast(FV, TypedPtrTy, "");
-  }
-
   LoadInst *TL =
       IRB.CreateAlignedLoad(LI.getType(), TV, LI.getAlign(),
                             LI.getName() + ".sroa.speculate.load.true");
@@ -1702,11 +1696,6 @@ static void rewriteMemOpOfSelect(SelectInst &SI, T &I,
     }
     CondMemOp.insertBefore(NewMemOpBB->getTerminator());
     Value *Ptr = SI.getOperand(1 + SuccIdx);
-    if (auto *PtrTy = Ptr->getType();
-        !PtrTy->isOpaquePointerTy() &&
-        PtrTy != CondMemOp.getPointerOperandType())
-      Ptr = BitCastInst::CreatePointerBitCastOrAddrSpaceCast(
-          Ptr, CondMemOp.getPointerOperandType(), "", &CondMemOp);
     CondMemOp.setOperand(I.getPointerOperandIndex(), Ptr);
     if (isa<LoadInst>(I)) {
       CondMemOp.setName(I.getName() + (IsThen ? ".then" : ".else") + ".val");
@@ -1769,8 +1758,6 @@ static bool rewriteSelectInstMemOps(SelectInst &SI,
 static Value *getAdjustedPtr(IRBuilderTy &IRB, const DataLayout &DL, Value *Ptr,
                              APInt Offset, Type *PointerTy,
                              const Twine &NamePrefix) {
-  assert(Ptr->getType()->isOpaquePointerTy() &&
-         "Only opaque pointers supported");
   if (Offset != 0)
     Ptr = IRB.CreateInBoundsGEP(IRB.getInt8Ty(), Ptr, IRB.getInt(Offset),
                                 NamePrefix + "sroa_idx");

llvm/tools/llvm-stress/llvm-stress.cpp

@@ -341,9 +341,7 @@ struct LoadModifier: public Modifier {
   void Act() override {
     // Try to use predefined pointers. If non-exist, use undef pointer value;
     Value *Ptr = getRandomPointerValue();
-    Type *Ty = Ptr->getType()->isOpaquePointerTy()
-                   ? pickType()
-                   : Ptr->getType()->getNonOpaquePointerElementType();
+    Type *Ty = pickType();
     Value *V = new LoadInst(Ty, Ptr, "L", BB->getTerminator());
     PT->push_back(V);
   }
@@ -356,9 +354,7 @@ struct StoreModifier: public Modifier {
   void Act() override {
     // Try to use predefined pointers. If non-exist, use undef pointer value;
     Value *Ptr = getRandomPointerValue();
-    Type *ValTy = Ptr->getType()->isOpaquePointerTy()
-                      ? pickType()
-                      : Ptr->getType()->getNonOpaquePointerElementType();
+    Type *ValTy = pickType();
 
     // Do not store vectors of i1s because they are unsupported
     // by the codegen.