[ConstExpr] Remove select constant expression

[nikic]

Summary

This removes the select constant expression, as part of https://discourse.llvm.org/t/rfc-remove-most-constant-expressions/63179. Uses of this expressions have already been removed in advance, so this just removes related infrastructure and updates tests.

[nikic]

ping

[reames]

LGTM

llvm/bindings/ocaml/llvm/llvm.ml

external const_sext_or_bitcast : llvalue -> lltype -> llvalue
                                = "llvm_const_sext_or_bitcast"
 external const_trunc_or_bitcast : llvalue -> lltype -> llvalue
                                 = "llvm_const_trunc_or_bitcast"
 external const_pointercast : llvalue -> lltype -> llvalue
                            = "llvm_const_pointercast"
 external const_intcast : llvalue -> lltype -> is_signed:bool -> llvalue
                        = "llvm_const_intcast"
 external const_fpcast : llvalue -> lltype -> llvalue = "llvm_const_fpcast"
-external const_select : llvalue -> llvalue -> llvalue -> llvalue
-                      = "llvm_const_select"
 external const_extractelement : llvalue -> llvalue -> llvalue
                               = "llvm_const_extractelement"
 external const_insertelement : llvalue -> llvalue -> llvalue -> llvalue
                              = "llvm_const_insertelement"
 external const_shufflevector : llvalue -> llvalue -> llvalue -> llvalue
                              = "llvm_const_shufflevector"
 external const_inline_asm : lltype -> string -> string -> bool -> bool ->
                             llvalue

llvm/bindings/ocaml/llvm/llvm.mli

(** [const_intcast c ty ~is_signed] returns a constant sext/zext, bitcast,
     See the method [llvm::ConstantExpr::getIntegerCast]. *)
 val const_intcast : llvalue -> lltype -> is_signed:bool -> llvalue
 
 (** [const_fpcast c ty] returns a constant fpext, bitcast, or fptrunc for fp ->
     fp casts of constant [c] to type [ty].
     See the method [llvm::ConstantExpr::getFPCast]. *)
 val const_fpcast : llvalue -> lltype -> llvalue
 
-(** [const_select cond t f] returns the constant conditional which returns value
-    [t] if the boolean constant [cond] is true and the value [f] otherwise.
-    See the method [llvm::ConstantExpr::getSelect]. *)
-val const_select : llvalue -> llvalue -> llvalue -> llvalue
-
 (** [const_extractelement vec i] returns the constant [i]th element of
     constant vector [vec]. [i] must be a constant [i32] value unsigned less than
     the size of the vector.
     See the method [llvm::ConstantExpr::getExtractElement]. *)
 val const_extractelement : llvalue -> llvalue -> llvalue
 
 (** [const_insertelement vec v i] returns the constant vector with the same
     elements as constant vector [v] but the [i]th element replaced by the

llvm/bindings/ocaml/llvm/llvm_ocaml.c

 }
 
 /* llvalue -> lltype -> llvalue */
 value llvm_const_fpcast(value CV, value T) {
   LLVMValueRef Value = LLVMConstFPCast(Value_val(CV), Type_val(T));
   return to_val(Value);
 }
 
-/* llvalue -> llvalue -> llvalue -> llvalue */
-value llvm_const_select(value Cond, value IfTrue, value IfFalse) {
-  LLVMValueRef Value =
-      LLVMConstSelect(Value_val(Cond), Value_val(IfTrue), Value_val(IfFalse));
-  return to_val(Value);
-}
-
 /* llvalue -> llvalue -> llvalue */
 value llvm_const_extractelement(value V, value I) {
   LLVMValueRef Value = LLVMConstExtractElement(Value_val(V), Value_val(I));
   return to_val(Value);
 }
 
 /* llvalue -> llvalue -> llvalue -> llvalue */
 value llvm_const_insertelement(value V, value E, value I) {

llvm/docs/ReleaseNotes.rst

 ----------------------
 
 * Typed pointers are no longer supported. See the `opaque pointers
   <OpaquePointers.html>`__ documentation for migration instructions.
 
 * The ``nofpclass`` attribute was introduced. This allows more
   optimizations around special floating point value comparisons.
 
+* The constant expression variants of the following instructions have been
+  removed:
+
+  * ``select``
+
 Changes to building LLVM
 ------------------------
 
 Changes to TableGen
 -------------------
 
 Changes to Interprocedural Optimizations
 ----------------------------------------

 * ``LLVMContextSetOpaquePointers``, a temporary API to pin to legacy typed
   pointer, has been removed.
 * Functions for adding legacy passes like ``LLVMAddInstructionCombiningPass``
   have been removed.
 * Removed ``LLVMPassManagerBuilderRef`` and functions interacting with it.
   These belonged to the no longer supported legacy pass manager.
 * As part of the opaque pointer transition, ``LLVMGetElementType`` no longer
   gives the pointee type of a pointer type.
+* The following functions for creating constant expressions have been removed,
+  because the underlying constant expressions are no longer supported. Instead,
+  an instruction should be created using the ``LLVMBuildXYZ`` APIs, which will
+  constant fold the operands if possible and create an instruction otherwise:
+
+  * ``LLVMConstSelect``
 
 Changes to the FastISel infrastructure
 --------------------------------------
 
 * ...
 
 Changes to the DAG infrastructure
 ---------------------------------

llvm/include/llvm-c/Core.h

LLVMValueRef LLVMConstSExtOrBitCast(LLVMValueRef ConstantVal,
                                     LLVMTypeRef ToType);
 LLVMValueRef LLVMConstTruncOrBitCast(LLVMValueRef ConstantVal,
                                      LLVMTypeRef ToType);
 LLVMValueRef LLVMConstPointerCast(LLVMValueRef ConstantVal,
                                   LLVMTypeRef ToType);
 LLVMValueRef LLVMConstIntCast(LLVMValueRef ConstantVal, LLVMTypeRef ToType,
                               LLVMBool isSigned);
 LLVMValueRef LLVMConstFPCast(LLVMValueRef ConstantVal, LLVMTypeRef ToType);
-LLVMValueRef LLVMConstSelect(LLVMValueRef ConstantCondition,
-                             LLVMValueRef ConstantIfTrue,
-                             LLVMValueRef ConstantIfFalse);
 LLVMValueRef LLVMConstExtractElement(LLVMValueRef VectorConstant,
                                      LLVMValueRef IndexConstant);
 LLVMValueRef LLVMConstInsertElement(LLVMValueRef VectorConstant,
                                     LLVMValueRef ElementValueConstant,
                                     LLVMValueRef IndexConstant);
 LLVMValueRef LLVMConstShuffleVector(LLVMValueRef VectorAConstant,
                                     LLVMValueRef VectorBConstant,
                                     LLVMValueRef MaskConstant);

llvm/include/llvm/IR/Constants.h

public:
   );
 
   /// Return true if this is a convert constant expression
   bool isCast() const;
 
   /// Return true if this is a compare constant expression
   bool isCompare() const;
 
-  /// Select constant expr
-  ///
-  /// \param OnlyIfReducedTy see \a getWithOperands() docs.
-  static Constant *getSelect(Constant *C, Constant *V1, Constant *V2,
-                             Type *OnlyIfReducedTy = nullptr);
-
   /// get - Return a binary or shift operator constant expression,
   /// folding if possible.
   ///
   /// \param OnlyIfReducedTy see \a getWithOperands() docs.
   static Constant *get(unsigned Opcode, Constant *C1, Constant *C2,
                        unsigned Flags = 0, Type *OnlyIfReducedTy = nullptr);
 
   /// Return an ICmp or FCmp comparison operator constant expression.

llvm/lib/AsmParser/LLParser.cpp

bool LLParser::parseValID(ValID &ID, PerFunctionState *PFS, Type *ExpectedTy) {
   case lltok::kw_fmul:
     return error(ID.Loc, "fmul constexprs are no longer supported");
   case lltok::kw_fdiv:
     return error(ID.Loc, "fdiv constexprs are no longer supported");
   case lltok::kw_frem:
     return error(ID.Loc, "frem constexprs are no longer supported");
   case lltok::kw_fneg:
     return error(ID.Loc, "fneg constexprs are no longer supported");
+  case lltok::kw_select:
+    return error(ID.Loc, "select constexprs are no longer supported");
   case lltok::kw_icmp:
   case lltok::kw_fcmp: {
     unsigned PredVal, Opc = Lex.getUIntVal();
     Constant *Val0, *Val1;
     Lex.Lex();
     if (parseCmpPredicate(PredVal, Opc) ||
         parseToken(lltok::lparen, "expected '(' in compare constantexpr") ||
         parseGlobalTypeAndValue(Val0) ||
case lltok::kw_xor: {
     ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1);
     ID.Kind = ValID::t_Constant;
     return false;
   }
 
   case lltok::kw_getelementptr:
   case lltok::kw_shufflevector:
   case lltok::kw_insertelement:
-  case lltok::kw_extractelement:
-  case lltok::kw_select: {
+  case lltok::kw_extractelement: {
     unsigned Opc = Lex.getUIntVal();
     SmallVector<Constant*, 16> Elts;
     bool InBounds = false;
     Type *Ty;
     Lex.Lex();
 
     if (Opc == Instruction::GetElementPtr)
       InBounds = EatIfPresent(lltok::kw_inbounds);
if (Opc == Instruction::GetElementPtr) {
         if (*InRangeOp == 0)
           return error(ID.Loc,
                        "inrange keyword may not appear on pointer operand");
         --*InRangeOp;
       }
 
       ID.ConstantVal = ConstantExpr::getGetElementPtr(Ty, Elts[0], Indices,
                                                       InBounds, InRangeOp);
-    } else if (Opc == Instruction::Select) {
-      if (Elts.size() != 3)
-        return error(ID.Loc, "expected three operands to select");
-      if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1],
-                                                              Elts[2]))
-        return error(ID.Loc, Reason);
-      ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]);
     } else if (Opc == Instruction::ShuffleVector) {
       if (Elts.size() != 3)
         return error(ID.Loc, "expected three operands to shufflevector");
       if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2]))
         return error(ID.Loc, "invalid operands to shufflevector");
       SmallVector<int, 16> Mask;
       ShuffleVectorInst::getShuffleMask(cast<Constant>(Elts[2]), Mask);
       ID.ConstantVal = ConstantExpr::getShuffleVector(Elts[0], Elts[1], Mask);

llvm/lib/Bitcode/Reader/BitcodeReader.cpp

if (ExpandConstantExprs)
     return false;
 
   if (Instruction::isBinaryOp(Opcode))
     return ConstantExpr::isSupportedBinOp(Opcode);
 
   if (Opcode == Instruction::GetElementPtr)
     return ConstantExpr::isSupportedGetElementPtr(BC->SrcElemTy);
 
-  return Opcode != Instruction::FNeg;
+  switch (Opcode) {
+  case Instruction::FNeg:
+  case Instruction::Select:
+    return false;
+  default:
+    return true;
+  }
 }
 
 Expected<Value *> BitcodeReader::materializeValue(unsigned StartValID,
                                                   BasicBlock *InsertBB) {
   // Quickly handle the case where there is no BitcodeConstant to resolve.
   if (StartValID < ValueList.size() && ValueList[StartValID] &&
       !isa<BitcodeConstant>(ValueList[StartValID]))
     return ValueList[StartValID];
if (isConstExprSupported(BC) && ConstOps.size() == Ops.size()) {
         case Instruction::FCmp:
           C = ConstantExpr::getCompare(BC->Flags, ConstOps[0], ConstOps[1]);
           break;
         case Instruction::GetElementPtr:
           C = ConstantExpr::getGetElementPtr(BC->SrcElemTy, ConstOps[0],
                                              ArrayRef(ConstOps).drop_front(),
                                              BC->Flags, BC->getInRangeIndex());
           break;
-        case Instruction::Select:
-          C = ConstantExpr::getSelect(ConstOps[0], ConstOps[1], ConstOps[2]);
-          break;
         case Instruction::ExtractElement:
           C = ConstantExpr::getExtractElement(ConstOps[0], ConstOps[1]);
           break;
         case Instruction::InsertElement:
           C = ConstantExpr::getInsertElement(ConstOps[0], ConstOps[1],
                                              ConstOps[2]);
           break;
         case Instruction::ShuffleVector: {

llvm/lib/Bitcode/Writer/BitcodeWriter.cpp

if (C->isNullValue()) {
         } else if (GO->isInBounds())
           Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
         for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
           Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
           Record.push_back(VE.getValueID(C->getOperand(i)));
         }
         break;
       }
-      case Instruction::Select:
-        Code = bitc::CST_CODE_CE_SELECT;
-        Record.push_back(VE.getValueID(C->getOperand(0)));
-        Record.push_back(VE.getValueID(C->getOperand(1)));
-        Record.push_back(VE.getValueID(C->getOperand(2)));
-        break;
       case Instruction::ExtractElement:
         Code = bitc::CST_CODE_CE_EXTRACTELT;
         Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
         Record.push_back(VE.getValueID(C->getOperand(0)));
         Record.push_back(VE.getTypeID(C->getOperand(1)->getType()));
         Record.push_back(VE.getValueID(C->getOperand(1)));
         break;
       case Instruction::InsertElement:

llvm/lib/IR/ConstantFold.cpp

if (C->getType()->isVectorTy())
       return !C->containsPoisonElement() && !C->containsConstantExpression();
 
     // TODO: Recursively analyze aggregates or other constants.
     return false;
   };
   if (isa<UndefValue>(V1) && NotPoison(V2)) return V2;
   if (isa<UndefValue>(V2) && NotPoison(V1)) return V1;
 
-  if (ConstantExpr *TrueVal = dyn_cast<ConstantExpr>(V1)) {
-    if (TrueVal->getOpcode() == Instruction::Select)
-      if (TrueVal->getOperand(0) == Cond)
-        return ConstantExpr::getSelect(Cond, TrueVal->getOperand(1), V2);
-  }
-  if (ConstantExpr *FalseVal = dyn_cast<ConstantExpr>(V2)) {
-    if (FalseVal->getOpcode() == Instruction::Select)
-      if (FalseVal->getOperand(0) == Cond)
-        return ConstantExpr::getSelect(Cond, V1, FalseVal->getOperand(2));
-  }
-
   return nullptr;
 }
 
 Constant *llvm::ConstantFoldExtractElementInstruction(Constant *Val,
                                                       Constant *Idx) {
   auto *ValVTy = cast<VectorType>(Val->getType());
 
   // extractelt poison, C -> poison

llvm/lib/IR/Constants.cpp

void llvm::deleteConstant(Constant *C) {
   case Constant::PoisonValueVal:
     delete static_cast<PoisonValue *>(C);
     break;
   case Constant::ConstantExprVal:
     if (isa<CastConstantExpr>(C))
       delete static_cast<CastConstantExpr *>(C);
     else if (isa<BinaryConstantExpr>(C))
       delete static_cast<BinaryConstantExpr *>(C);
-    else if (isa<SelectConstantExpr>(C))
-      delete static_cast<SelectConstantExpr *>(C);
     else if (isa<ExtractElementConstantExpr>(C))
       delete static_cast<ExtractElementConstantExpr *>(C);
     else if (isa<InsertElementConstantExpr>(C))
       delete static_cast<InsertElementConstantExpr *>(C);
     else if (isa<ShuffleVectorConstantExpr>(C))
       delete static_cast<ShuffleVectorConstantExpr *>(C);
     else if (isa<GetElementPtrConstantExpr>(C))
       delete static_cast<GetElementPtrConstantExpr *>(C);
Constant *ConstantExpr::getWithOperands(ArrayRef<Constant *> Ops, Type *Ty,
   case Instruction::SIToFP:
   case Instruction::FPToUI:
   case Instruction::FPToSI:
   case Instruction::PtrToInt:
   case Instruction::IntToPtr:
   case Instruction::BitCast:
   case Instruction::AddrSpaceCast:
     return ConstantExpr::getCast(getOpcode(), Ops[0], Ty, OnlyIfReduced);
-  case Instruction::Select:
-    return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2], OnlyIfReducedTy);
   case Instruction::InsertElement:
     return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2],
                                           OnlyIfReducedTy);
   case Instruction::ExtractElement:
     return ConstantExpr::getExtractElement(Ops[0], Ops[1], OnlyIfReducedTy);
   case Instruction::ShuffleVector:
     return ConstantExpr::getShuffleVector(Ops[0], Ops[1], getShuffleMask(),
                                           OnlyIfReducedTy);
Constant *ConstantExpr::getCompare(unsigned short Predicate, Constant *C1,
   case CmpInst::ICMP_EQ:  case CmpInst::ICMP_NE:  case CmpInst::ICMP_UGT:
   case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
   case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
   case CmpInst::ICMP_SLE:
     return getICmp(Predicate, C1, C2, OnlyIfReduced);
   }
 }
 
-Constant *ConstantExpr::getSelect(Constant *C, Constant *V1, Constant *V2,
-                                  Type *OnlyIfReducedTy) {
-  assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
-
-  if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
-    return SC;        // Fold common cases
-
-  if (OnlyIfReducedTy == V1->getType())
-    return nullptr;
-
-  Constant *ArgVec[] = { C, V1, V2 };
-  ConstantExprKeyType Key(Instruction::Select, ArgVec);
-
-  LLVMContextImpl *pImpl = C->getContext().pImpl;
-  return pImpl->ExprConstants.getOrCreate(V1->getType(), Key);
-}
-
 Constant *ConstantExpr::getGetElementPtr(Type *Ty, Constant *C,
                                          ArrayRef<Value *> Idxs, bool InBounds,
                                          std::optional<unsigned> InRangeIndex,
                                          Type *OnlyIfReducedTy) {
   PointerType *OrigPtrTy = cast<PointerType>(C->getType()->getScalarType());
   assert(Ty && "Must specify element type");
   assert(isSupportedGetElementPtr(Ty) && "Element type is unsupported!");
   assert(OrigPtrTy->isOpaqueOrPointeeTypeMatches(Ty));
Instruction *ConstantExpr::getAsInstruction(Instruction *InsertBefore) const {
   case Instruction::FPToUI:
   case Instruction::FPToSI:
   case Instruction::PtrToInt:
   case Instruction::IntToPtr:
   case Instruction::BitCast:
   case Instruction::AddrSpaceCast:
     return CastInst::Create((Instruction::CastOps)getOpcode(), Ops[0],
                             getType(), "", InsertBefore);
-  case Instruction::Select:
-    return SelectInst::Create(Ops[0], Ops[1], Ops[2], "", InsertBefore);
   case Instruction::InsertElement:
     return InsertElementInst::Create(Ops[0], Ops[1], Ops[2], "", InsertBefore);
   case Instruction::ExtractElement:
     return ExtractElementInst::Create(Ops[0], Ops[1], "", InsertBefore);
   case Instruction::ShuffleVector:
     return new ShuffleVectorInst(Ops[0], Ops[1], getShuffleMask(), "",
                                  InsertBefore);
 

llvm/lib/IR/ConstantsContext.h

public:
   static bool classof(const ConstantExpr *CE) {
     return Instruction::isBinaryOp(CE->getOpcode());
   }
   static bool classof(const Value *V) {
     return isa<ConstantExpr>(V) && classof(cast<ConstantExpr>(V));
   }
 };
 
-/// SelectConstantExpr - This class is private to Constants.cpp, and is used
-/// behind the scenes to implement select constant exprs.
-class SelectConstantExpr final : public ConstantExpr {
-public:
-  SelectConstantExpr(Constant *C1, Constant *C2, Constant *C3)
-    : ConstantExpr(C2->getType(), Instruction::Select, &Op<0>(), 3) {
-    Op<0>() = C1;
-    Op<1>() = C2;
-    Op<2>() = C3;
-  }
-
-  // allocate space for exactly three operands
-  void *operator new(size_t S) { return User::operator new(S, 3); }
-  void operator delete(void *Ptr) { User::operator delete(Ptr); }
-
-  /// Transparently provide more efficient getOperand methods.
-  DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
-
-  static bool classof(const ConstantExpr *CE) {
-    return CE->getOpcode() == Instruction::Select;
-  }
-  static bool classof(const Value *V) {
-    return isa<ConstantExpr>(V) && classof(cast<ConstantExpr>(V));
-  }
-};
-
 /// ExtractElementConstantExpr - This class is private to
 /// Constants.cpp, and is used behind the scenes to implement
 /// extractelement constant exprs.
 class ExtractElementConstantExpr final : public ConstantExpr {
 public:
   ExtractElementConstantExpr(Constant *C1, Constant *C2)
     : ConstantExpr(cast<VectorType>(C1->getType())->getElementType(),
                    Instruction::ExtractElement, &Op<0>(), 2) {

 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CastConstantExpr, Value)
 
 template <>
 struct OperandTraits<BinaryConstantExpr>
     : public FixedNumOperandTraits<BinaryConstantExpr, 2> {};
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(BinaryConstantExpr, Value)
 
 template <>
-struct OperandTraits<SelectConstantExpr>
-    : public FixedNumOperandTraits<SelectConstantExpr, 3> {};
-DEFINE_TRANSPARENT_OPERAND_ACCESSORS(SelectConstantExpr, Value)
-
-template <>
 struct OperandTraits<ExtractElementConstantExpr>
     : public FixedNumOperandTraits<ExtractElementConstantExpr, 2> {};
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ExtractElementConstantExpr, Value)
 
 template <>
 struct OperandTraits<InsertElementConstantExpr>
     : public FixedNumOperandTraits<InsertElementConstantExpr, 3> {};
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(InsertElementConstantExpr, Value)
ConstantExpr *create(TypeClass *Ty) const {
     default:
       if (Instruction::isCast(Opcode))
         return new CastConstantExpr(Opcode, Ops[0], Ty);
       if ((Opcode >= Instruction::BinaryOpsBegin &&
            Opcode < Instruction::BinaryOpsEnd))
         return new BinaryConstantExpr(Opcode, Ops[0], Ops[1],
                                       SubclassOptionalData);
       llvm_unreachable("Invalid ConstantExpr!");
-    case Instruction::Select:
-      return new SelectConstantExpr(Ops[0], Ops[1], Ops[2]);
     case Instruction::ExtractElement:
       return new ExtractElementConstantExpr(Ops[0], Ops[1]);
     case Instruction::InsertElement:
       return new InsertElementConstantExpr(Ops[0], Ops[1], Ops[2]);
     case Instruction::ShuffleVector:
       return new ShuffleVectorConstantExpr(Ops[0], Ops[1], ShuffleMask);
     case Instruction::GetElementPtr:
       return GetElementPtrConstantExpr::Create(ExplicitTy, Ops[0], Ops.slice(1),

llvm/lib/IR/Core.cpp

return wrap(ConstantExpr::getIntegerCast(unwrap<Constant>(ConstantVal),
                                            unwrap(ToType), isSigned));
 }
 
 LLVMValueRef LLVMConstFPCast(LLVMValueRef ConstantVal, LLVMTypeRef ToType) {
   return wrap(ConstantExpr::getFPCast(unwrap<Constant>(ConstantVal),
                                       unwrap(ToType)));
 }
 
-LLVMValueRef LLVMConstSelect(LLVMValueRef ConstantCondition,
-                             LLVMValueRef ConstantIfTrue,
-                             LLVMValueRef ConstantIfFalse) {
-  return wrap(ConstantExpr::getSelect(unwrap<Constant>(ConstantCondition),
-                                      unwrap<Constant>(ConstantIfTrue),
-                                      unwrap<Constant>(ConstantIfFalse)));
-}
-
 LLVMValueRef LLVMConstExtractElement(LLVMValueRef VectorConstant,
                                      LLVMValueRef IndexConstant) {
   return wrap(ConstantExpr::getExtractElement(unwrap<Constant>(VectorConstant),
                                               unwrap<Constant>(IndexConstant)));
 }
 
 LLVMValueRef LLVMConstInsertElement(LLVMValueRef VectorConstant,
                                     LLVMValueRef ElementValueConstant,

llvm/lib/Transforms/Scalar/InferAddressSpaces.cpp

static Value *cloneConstantExprWithNewAddressSpace(
   }
 
   if (CE->getOpcode() == Instruction::BitCast) {
     if (Value *NewOperand = ValueWithNewAddrSpace.lookup(CE->getOperand(0)))
       return ConstantExpr::getBitCast(cast<Constant>(NewOperand), TargetType);
     return ConstantExpr::getAddrSpaceCast(CE, TargetType);
   }
 
-  if (CE->getOpcode() == Instruction::Select) {
-    Constant *Src0 = CE->getOperand(1);
-    Constant *Src1 = CE->getOperand(2);
-    if (Src0->getType()->getPointerAddressSpace() ==
-        Src1->getType()->getPointerAddressSpace()) {
-
-      return ConstantExpr::getSelect(
-          CE->getOperand(0), ConstantExpr::getAddrSpaceCast(Src0, TargetType),
-          ConstantExpr::getAddrSpaceCast(Src1, TargetType));
-    }
-  }
-
   if (CE->getOpcode() == Instruction::IntToPtr) {
     assert(isNoopPtrIntCastPair(cast<Operator>(CE), *DL, TTI));
     Constant *Src = cast<ConstantExpr>(CE->getOperand(0))->getOperand(0);
     assert(Src->getType()->getPointerAddressSpace() == NewAddrSpace);
     return ConstantExpr::getBitCast(Src, TargetType);
   }
 
   // Computes the operands of the new constant expression.

llvm/test/Analysis/ScalarEvolution/logical-operations.ll

 ;
   %r = select i1 %c, ptr @constant, ptr @another_constant
   ret ptr %r
 }
 
 define ptr @tautological_select() {
 ; CHECK-LABEL: 'tautological_select'
 ; CHECK-NEXT:  Classifying expressions for: @tautological_select
-; CHECK-NEXT:    %r = getelementptr i8, ptr @constant, i32 0
+; CHECK-NEXT:    %s = select i1 true, ptr @constant, ptr @another_constant
+; CHECK-NEXT:    --> @constant U: [0,-3) S: [-9223372036854775808,9223372036854775805)
+; CHECK-NEXT:    %r = getelementptr i8, ptr %s
 ; CHECK-NEXT:    --> @constant U: [0,-3) S: [-9223372036854775808,9223372036854775805)
 ; CHECK-NEXT:  Determining loop execution counts for: @tautological_select
 ;
-  %r = getelementptr i8, ptr select (i1 true, ptr @constant, ptr @another_constant), i32 0
+  %s = select i1 true, ptr @constant, ptr @another_constant
+  %r = getelementptr i8, ptr %s
   ret ptr %r
 }
 
 define ptr @tautological_select_like_phi(i32 %tc) {
 ; CHECK-LABEL: 'tautological_select_like_phi'
 ; CHECK-NEXT:  Classifying expressions for: @tautological_select_like_phi
 ; CHECK-NEXT:    %iv = phi i32 [ 0, %entry ], [ %iv.next, %latch ]
 ; CHECK-NEXT:    --> {0,+,1}<nuw><nsw><%loop> U: [0,101) S: [0,101) Exits: 100 LoopDispositions: { %loop: Computable }

llvm/test/Assembler/ConstantExprFoldSelect.ll

-; RUN: llvm-as < %s | llvm-dis | FileCheck %s
+; RUN: opt -S -passes=instsimplify < %s | FileCheck %s
 ; RUN: verify-uselistorder %s
 ; PR18319
 
-define void @function() {
-  %c = trunc <4 x i16> select (<4 x i1> <i1 undef, i1 undef, i1 false, i1 true>, <4 x i16> <i16 undef, i16 2, i16 3, i16 4>, <4 x i16> <i16 -1, i16 -2, i16 -3, i16 -4>) to <4 x i8>
+define <4 x i16> @function() {
+  %s = select <4 x i1> <i1 undef, i1 undef, i1 false, i1 true>, <4 x i16> <i16 undef, i16 2, i16 3, i16 4>, <4 x i16> <i16 -1, i16 -2, i16 -3, i16 -4>
 ; CHECK: <i16 undef, i16 -2, i16 -3, i16 4>
-  ret void
+  ret <4 x i16> %s
 }

llvm/test/Bindings/OCaml/core.ml

ignore (define_global "const_inttoptr" (const_inttoptr (const_add foldbomb five)
                                                   void_ptr) m);
   ignore (define_global "const_bitcast" (const_bitcast ffoldbomb i64_type) m);
   ignore (define_global "const_intcast"
           (const_intcast foldbomb i128_type ~is_signed:false) m);
 
   group "misc constants";
   (* CHECK: const_size_of{{.*}}getelementptr{{.*}}null
    * CHECK: const_gep{{.*}}getelementptr
-   * CHECK: const_select{{.*}}select
    * CHECK: const_extractelement{{.*}}extractelement
    * CHECK: const_insertelement{{.*}}insertelement
    * CHECK: const_shufflevector = global <4 x i32> <i32 0, i32 1, i32 1, i32 0>
    *)
   ignore (define_global "const_size_of" (size_of (pointer_type context)) m);
   ignore (define_global "const_gep" (const_gep i8_type foldbomb_gv [| five |])
           m);
-  ignore (define_global "const_select" (const_select
-    (const_icmp Icmp.Sle foldbomb five)
-    (const_int i8_type (-1))
-    (const_int i8_type 0)) m);
   let zero = const_int i32_type 0 in
   let one  = const_int i32_type 1 in
   ignore (define_global "const_extractelement" (const_extractelement
     (const_vector [| zero; one; zero; one |])
     (const_trunc foldbomb i32_type)) m);
   ignore (define_global "const_insertelement" (const_insertelement
     (const_vector [| zero; one; zero; one |])
     zero (const_trunc foldbomb i32_type)) m);

llvm/test/Bitcode/select.ll

-; RUN: llvm-as < %s | llvm-dis | FileCheck %s
-; RUN: verify-uselistorder < %s
-
-define <2 x i32> @main() {
-  ret <2 x i32> select (<2 x i1> <i1 false, i1 undef>, <2 x i32> zeroinitializer, <2 x i32> <i32 0, i32 undef>)
-}
-
-; CHECK: define <2 x i32> @main() {
-; CHECK:   ret <2 x i32> <i32 0, i32 undef>
-; CHECK: }
-
-define <2 x float> @f() {
-  ret <2 x float> select (i1 ptrtoint (<2 x float> ()* @f to i1), <2 x float> <float 1.000000e+00, float 0.000000e+00>, <2 x float> zeroinitializer)
-}
-
-; CHECK: define <2 x float> @f() {
-; CHECK:   ret <2 x float> select (i1 ptrtoint (ptr @f to i1), <2 x float> <float 1.000000e+00, float 0.000000e+00>, <2 x float> zeroinitializer)
-; CHECK: }

llvm/test/Bitcode/thinlto-function-summary-callgraph-cast.ll

 ; Test to check the callgraph for calls to casts.
 ; RUN: opt -module-summary %s -o %t.o
 ; RUN: llvm-bcanalyzer -dump %t.o | FileCheck %s
 ; PR34966
 
 ; CHECK:       <GLOBALVAL_SUMMARY_BLOCK
 ; CHECK-NEXT:    <VERSION
 ; CHECK-NEXT:    <FLAGS
 ; "op7" is a call to "callee" function.
 ; CHECK-NEXT:    <PERMODULE {{.*}} op7=3 op8=[[ALIASID:[0-9]+]]/>
 ; "another_caller" has only references but no calls.
-; CHECK-NEXT:    <PERMODULE {{.*}} op4=3 {{.*}} op9={{[0-9]+}}/>
+; CHECK-NEXT:    <PERMODULE {{.*}}/>
 ; CHECK-NEXT:    <PERMODULE {{.*}} op0=[[ALIASEEID:[0-9]+]]
 ; CHECK-NEXT:    <ALIAS {{.*}} op0=[[ALIASID]] {{.*}} op2=[[ALIASEEID]]/>
 ; CHECK-NEXT:    <BLOCK_COUNT op0=3/>
 ; CHECK-NEXT:  </GLOBALVAL_SUMMARY_BLOCK>
 
 ; ModuleID = 'thinlto-function-summary-callgraph-cast.ll'
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
 define void @caller() {
     call void @callee()
     call void @analias()
     ret void
 }
 
 define void @another_caller() {
     ; Test calls that aren't handled either as direct or indirect.
-    call void select (i1 icmp eq (ptr @global, ptr null), ptr @f, ptr @g)()
+    call void getelementptr (i8, ptr @f, i64 ptrtoint (ptr @g to i64))()
     ret void
 }
 
 declare void @callee(...)
 
 @analias = alias void (...), ptr @aliasee
 
 define void @aliasee() {
 entry:
     ret void
 }
 
 declare void @f()
 declare void @g()
 @global = extern_weak global i32

llvm/test/Bitcode/vscale-round-trip.ll

define <vscale x 4 x i32> @non_const_shufflevector(<vscale x 4 x i32> %lhs,
   %res = shufflevector <vscale x 4 x i32> %lhs,
                        <vscale x 4 x i32> %rhs,
                        <vscale x 4 x i32> zeroinitializer
 
   ret <vscale x 4 x i32> %res
 }
 
 ; CHECK-LABEL: define <vscale x 4 x i32> @const_select()
-; CHECK: <vscale x 4 x i32> select (<vscale x 4 x i1>
+; CHECK: select <vscale x 4 x i1>
 
 define <vscale x 4 x i32> @const_select() {
-  ret <vscale x 4 x i32> select
-    (<vscale x 4 x i1> insertelement
+  %s = select <vscale x 4 x i1> insertelement
       (<vscale x 4 x i1> undef,
        i1 icmp ne (i32* @important_val, i32* null),
        i32 0),
      <vscale x 4 x i32> zeroinitializer,
-     <vscale x 4 x i32> insertelement (<vscale x 4 x i32> undef, i32 1, i32 0))
+     <vscale x 4 x i32> insertelement (<vscale x 4 x i32> undef, i32 1, i32 0)
+  ret <vscale x 4 x i32> %s
 }

llvm/test/CodeGen/AMDGPU/GlobalISel/irtranslator-constantexpr.ll

define i32 @test() {
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
   ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
   ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY2]](s32)
   ; CHECK-NEXT:   $vgpr0 = COPY [[COPY3]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0
   ret i32 bitcast (<1 x i32> <i32 extractelement (<1 x i32> bitcast (i32 zext (i1 icmp eq (ptr @var, ptr inttoptr (i32 -1 to ptr)) to i32) to <1 x i32>), i64 0)> to i32)
 }
 
-@gint = external addrspace(1) global i8, align 4
-
-; Technically we should be able to fold away the compare to true, but
-; currently constexpr doesn't understand null in non-0 address spaces.
-define amdgpu_kernel void @constantexpr_select_0() {
-  ; CHECK-LABEL: name: constantexpr_select_0
-  ; CHECK: bb.1 (%ir-block.0):
-  ; CHECK-NEXT:   [[GV:%[0-9]+]]:_(p1) = G_GLOBAL_VALUE @gint
-  ; CHECK-NEXT:   [[C:%[0-9]+]]:_(p1) = G_CONSTANT i64 0
-  ; CHECK-NEXT:   [[ICMP:%[0-9]+]]:_(s1) = G_ICMP intpred(eq), [[GV]](p1), [[C]]
-  ; CHECK-NEXT:   [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
-  ; CHECK-NEXT:   [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
-  ; CHECK-NEXT:   [[SELECT:%[0-9]+]]:_(s32) = G_SELECT [[ICMP]](s1), [[C1]], [[C2]]
-  ; CHECK-NEXT:   [[DEF:%[0-9]+]]:_(p1) = G_IMPLICIT_DEF
-  ; CHECK-NEXT:   G_STORE [[SELECT]](s32), [[DEF]](p1) :: (store (s32) into `ptr addrspace(1) undef`, addrspace 1)
-  ; CHECK-NEXT:   S_ENDPGM 0
-  store i32 select (i1 icmp eq (ptr addrspace(1) @gint, ptr addrspace(1) null), i32 1, i32 0), ptr addrspace(1) undef, align 4
-  ret void
-}
-
-define amdgpu_kernel void @constantexpr_select_1() {
-  ; CHECK-LABEL: name: constantexpr_select_1
-  ; CHECK: bb.1 (%ir-block.0):
-  ; CHECK-NEXT:   [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1024
-  ; CHECK-NEXT:   [[INTTOPTR:%[0-9]+]]:_(p1) = G_INTTOPTR [[C]](s64)
-  ; CHECK-NEXT:   [[GV:%[0-9]+]]:_(p1) = G_GLOBAL_VALUE @gint
-  ; CHECK-NEXT:   [[ICMP:%[0-9]+]]:_(s1) = G_ICMP intpred(eq), [[INTTOPTR]](p1), [[GV]]
-  ; CHECK-NEXT:   [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
-  ; CHECK-NEXT:   [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
-  ; CHECK-NEXT:   [[SELECT:%[0-9]+]]:_(s32) = G_SELECT [[ICMP]](s1), [[C1]], [[C2]]
-  ; CHECK-NEXT:   [[DEF:%[0-9]+]]:_(p1) = G_IMPLICIT_DEF
-  ; CHECK-NEXT:   G_STORE [[SELECT]](s32), [[DEF]](p1) :: (store (s32) into `ptr addrspace(1) undef`, addrspace 1)
-  ; CHECK-NEXT:   S_ENDPGM 0
-  store i32 select (i1 icmp eq (ptr addrspace(1) @gint, ptr addrspace(1) inttoptr (i64 1024 to ptr addrspace(1))), i32 1, i32 0), ptr addrspace(1) undef, align 4
-  ret void
-}
-
 @a = external global [2 x i32], align 4
 
 define i32 @test_fcmp_constexpr() {
   ; CHECK-LABEL: name: test_fcmp_constexpr
   ; CHECK: bb.1.entry:
   ; CHECK-NEXT:   [[GV:%[0-9]+]]:_(p0) = G_GLOBAL_VALUE @a
   ; CHECK-NEXT:   [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 4
   ; CHECK-NEXT:   [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[GV]], [[C]](s64)

llvm/test/CodeGen/Generic/pr33094.ll

 ; RUN: llc < %s
 
 ; PR33094
 ; Make sure that a constant extractvalue doesn't cause a crash in
 ; SelectionDAGBuilder::visitExtractValue.
 
 %A = type {}
 %B = type {}
 %Tuple = type { i64 }
 
 @A_Inst = global %A zeroinitializer
 @B_Inst = global %B zeroinitializer
 
 define i64 @foo() {
-  %e = extractvalue %Tuple select (i1 icmp eq
-                        (ptr @A_Inst, ptr @B_Inst),
-                        %Tuple { i64 33 }, %Tuple { i64 42 }), 0
+  %s = select i1 icmp eq (ptr @A_Inst, ptr @B_Inst),
+       %Tuple { i64 33 }, %Tuple { i64 42 }
+  %e = extractvalue %Tuple %s, 0
   ret i64 %e
 }

llvm/test/CodeGen/PowerPC/ext-bool-trunc-repl.ll

 ; RUN: llc -verify-machineinstrs -O0 < %s | FileCheck %s
 target datalayout = "e-m:e-i64:64-n32:64"
 target triple = "powerpc64le-unknown-linux-gnu"
 
 @c = external global i32, align 4
 @d = external global [2 x i32], align 4
 
 ; Function Attrs: norecurse nounwind
 define void @fn2() #0 {
 ; CHECK-LABEL: @fn2
 
   br i1 undef, label %1, label %10
 
-; <label>:1:                                      ; preds = %0
+1:                                                ; preds = %0
   br i1 undef, label %3, label %2
 
-; <label>:2:                                      ; preds = %2, %1
+2:                                                ; preds = %2, %1
   br i1 undef, label %3, label %2
 
-; <label>:3:                                      ; preds = %2, %1
+3:                                                ; preds = %2, %1
   br i1 undef, label %8, label %4
 
-; <label>:4:                                      ; preds = %4, %3
+4:                                                ; preds = %4, %3
   %5 = phi i64 [ %6, %4 ], [ undef, %3 ]
-  %6 = and i64 %5, and (i64 and (i64 and (i64 and (i64 and (i64 and (i64 and (i64 sext (i32 select (i1 icmp slt (i16 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i16), i16 0), i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 lshr (i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 6)) to i64), i64 sext (i32 select (i1 icmp slt (i16 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i16), i16 0), i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 lshr (i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 6)) to i64)), i64 sext (i32 select (i1 icmp slt (i16 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i16), i16 0), i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 lshr (i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 6)) to i64)), i64 sext (i32 select (i1 icmp slt (i16 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i16), i16 0), i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 lshr (i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 6)) to i64)), i64 sext (i32 select (i1 icmp slt (i16 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i16), i16 0), i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 lshr (i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 6)) to i64)), i64 sext (i32 select (i1 icmp slt (i16 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i16), i16 0), i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 lshr (i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 6)) to i64)), i64 sext (i32 select (i1 icmp slt (i16 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i16), i16 0), i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 lshr (i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 6)) to i64)), i64 sext (i32 select (i1 icmp slt (i16 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i16), i16 0), i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 lshr (i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 6)) to i64))
+  %constexpr = select i1 icmp slt (i16 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i16), i16 0), i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 lshr (i32 zext (i1 icmp eq (ptr getelementptr inbounds ([2 x i32], ptr @d, i64 0, i64 1), ptr @c) to i32), i32 6)
+  %constexpr1 = sext i32 %constexpr to i64
+  %constexpr2 = and i64 %constexpr1, %constexpr1
+  %constexpr3 = and i64 %constexpr2, %constexpr1
+  %constexpr4 = and i64 %constexpr3, %constexpr1
+  %constexpr5 = and i64 %constexpr4, %constexpr1
+  %constexpr6 = and i64 %constexpr5, %constexpr1
+  %constexpr7 = and i64 %constexpr6, %constexpr1
+  %constexpr8 = and i64 %constexpr7, %constexpr1
+  %6 = and i64 %5, %constexpr8
   %7 = icmp slt i32 undef, 6
   br i1 %7, label %4, label %8
 
-; <label>:8:                                      ; preds = %4, %3
+8:                                                ; preds = %4, %3
   %9 = phi i64 [ undef, %3 ], [ %6, %4 ]
   br label %10
 
-; <label>:10:                                     ; preds = %8, %0
+10:                                               ; preds = %8, %0
   ret void
 }
 
 attributes #0 = { norecurse nounwind "target-cpu"="ppc64le" }
 

llvm/test/CodeGen/PowerPC/pr24636.ll

 ; RUN: llc -verify-machineinstrs < %s | FileCheck %s
 target datalayout = "e-m:e-i64:64-n32:64"
 target triple = "powerpc64le-unknown-linux-gnu"
 
-@c = external global i32, align 4
+@c = external unnamed_addr global i32, align 4
 @b = external global [1 x i32], align 4
 
 ; Function Attrs: nounwind
 define void @fn2() #0 align 4 {
   br i1 undef, label %.lr.ph, label %4
 
 ; We used to crash because a bad DAGCombine was creating i32-typed SETCC nodes,
 ; even when crbits are enabled.
 ; CHECK-LABEL: @fn2
 ; CHECK: blr
 
 .lr.ph:                                           ; preds = %0
   br i1 undef, label %.lr.ph.split, label %.preheader
 
 .preheader:                                       ; preds = %.preheader, %.lr.ph
   br i1 undef, label %.lr.ph.split, label %.preheader
 
 .lr.ph.split:                                     ; preds = %.preheader, %.lr.ph
   br i1 undef, label %._crit_edge, label %.lr.ph.split.split
 
 .lr.ph.split.split:                               ; preds = %.lr.ph.split.split, %.lr.ph.split
   %1 = phi i32 [ %2, %.lr.ph.split.split ], [ undef, %.lr.ph.split ]
-  %2 = and i32 %1, and (i32 and (i32 and (i32 and (i32 and (i32 and (i32 and (i32 zext (i1 select (i1 icmp eq (ptr @c, ptr @b), i1 true, i1 false) to i32), i32 zext (i1 select (i1 icmp eq (ptr @c, ptr @b), i1 true, i1 false) to i32)), i32 zext (i1 select (i1 icmp eq (ptr @c, ptr @b), i1 true, i1 false) to i32)), i32 zext (i1 select (i1 icmp eq (ptr @c, ptr @b), i1 true, i1 false) to i32)), i32 zext (i1 select (i1 icmp eq (ptr @c, ptr @b), i1 true, i1 false) to i32)), i32 zext (i1 select (i1 icmp eq (ptr @c, ptr @b), i1 true, i1 false) to i32)), i32 zext (i1 select (i1 icmp eq (ptr @c, ptr @b), i1 true, i1 false) to i32)), i32 zext (i1 select (i1 icmp eq (ptr @c, ptr @b), i1 true, i1 false) to i32))
+  %constexpr = select i1 icmp eq (ptr @c, ptr @b), i1 true, i1 false
+  %constexpr1 = zext i1 %constexpr to i32
+  %constexpr2 = and i32 %constexpr1, %constexpr1
+  %constexpr3 = and i32 %constexpr2, %constexpr1
+  %constexpr4 = and i32 %constexpr3, %constexpr1
+  %constexpr5 = and i32 %constexpr4, %constexpr1
+  %constexpr6 = and i32 %constexpr5, %constexpr1
+  %constexpr7 = and i32 %constexpr6, %constexpr1
+  %constexpr8 = and i32 %constexpr7, %constexpr1
+  %2 = and i32 %1, %constexpr8
   %3 = icmp slt i32 undef, 4
   br i1 %3, label %.lr.ph.split.split, label %._crit_edge
 
 ._crit_edge:                                      ; preds = %.lr.ph.split.split, %.lr.ph.split
   %.lcssa = phi i32 [ undef, %.lr.ph.split ], [ %2, %.lr.ph.split.split ]
   br label %4
 
-; <label>:4                                       ; preds = %._crit_edge, %0
+4:                                                ; preds = %._crit_edge, %0
   ret void
 }
 
 attributes #0 = { nounwind "target-cpu"="ppc64le" }
 

llvm/test/CodeGen/WebAssembly/call.ll

define void @coldcc_tail_call_void_nullary() {
   ret void
 }
 
 ; CHECK-LABEL: call_constexpr:
 ; CHECK-NEXT: .functype call_constexpr () -> (){{$}}
 ; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, 2{{$}}
 ; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, 3{{$}}
 ; CHECK-NEXT: call .Lvararg_func_bitcast, $pop[[L0]], $pop[[L1]]{{$}}
-; CHECK-NEXT: call other_void_nullary{{$}}
+; CHECK-NEXT: i32.const $push[[L3:[0-9]+]]=, void_nullary{{$}}
+; CHECK-NEXT: i32.const $push[[L2:[0-9]+]]=, other_void_nullary{{$}}
+; CHECK-NEXT: i32.add   $push[[L4:[0-9]+]]=, $pop[[L3]], $pop[[L2]]{{$}}
+; CHECK-NEXT: call_indirect $pop[[L4]]{{$}}
 ; CHECK-NEXT: call void_nullary{{$}}
 ; CHECK-NEXT: return{{$}}
 declare void @vararg_func(...)
 declare void @other_void_nullary()
 define void @call_constexpr() {
 bb0:
   call void @vararg_func(i32 2, i32 3)
   br label %bb1
 bb1:
-  call void select (i1 0, ptr @void_nullary, ptr @other_void_nullary)()
+  call void getelementptr (i8, ptr @void_nullary, i32 ptrtoint (ptr @other_void_nullary to i32))()
   br label %bb2
 bb2:
   call void inttoptr (i32 ptrtoint (ptr @void_nullary to i32) to ptr)()
   ret void
 }
 
 ; TODO: test the following:
 ;  - More argument combinations.
 ;  - Tail call.
 ;  - Interesting returns (struct, multiple).
 ;  - Vararg.

llvm/test/CodeGen/X86/2008-09-19-RegAllocBug.ll

 ; RUN: llc < %s -mtriple=i386-apple-darwin
 ; PR2808
 
 @g_3 = external global i32    ; <ptr> [#uses=1]
 
 define i32 @func_4() nounwind {
 entry:
   %0 = load i32, ptr @g_3, align 4    ; <i32> [#uses=2]
   %1 = trunc i32 %0 to i8    ; <i8> [#uses=1]
   %2 = sub i8 1, %1   ; <i8> [#uses=1]
   %3 = sext i8 %2 to i32    ; <i32> [#uses=1]
-  %.0 = ashr i32 %3, select (i1 icmp ne (i8 zext (i1 icmp ugt (i32 ptrtoint (ptr @func_4 to i32), i32 3) to i8), i8 0), i32 0, i32 ptrtoint (ptr @func_4 to i32))    ; <i32> [#uses=1]
-  %4 = urem i32 %0, %.0    ; <i32> [#uses=1]
-  %5 = icmp eq i32 %4, 0    ; <i1> [#uses=1]
-  br i1 %5, label %return, label %bb4
+  %s = select i1 icmp ne (i8 zext (i1 icmp ugt (i32 ptrtoint (ptr @func_4 to i32), i32 3) to i8), i8 0), i32 0, i32 ptrtoint (ptr @func_4 to i32)
+  %ashr = ashr i32 %3, %s
+  %urem = urem i32 %0, %ashr
+  %cmp = icmp eq i32 %urem, 0
+  br i1 %cmp, label %return, label %bb4
 
 bb4:    ; preds = %entry
   ret i32 undef
 
 return:   ; preds = %entry
   ret i32 undef
 }

llvm/test/CodeGen/X86/no-plt.ll

 ; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux-gnu -relocation-model=pic \
 ; RUN:   | FileCheck -check-prefix=X64 --check-prefix=PIC %s
 ; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux-gnu \
 ; RUN:   | FileCheck -check-prefix=X64 --check-prefix=STATIC %s
 
 define i32 @fp_weakfunc() {
 ; X64: weakfunc@GOTPCREL(%rip)
-  ret i32 select (i1 icmp ne (ptr @weakfunc, ptr null), i32 1, i32 0)
+  %s = select i1 icmp ne (ptr @weakfunc, ptr null), i32 1, i32 0
+  ret i32 %s
 }
 declare extern_weak i32 @weakfunc() nonlazybind
 
 define void @memset_call(ptr nocapture %a, i8 %c, i32 %n) {
 ; X64: callq *memset@GOTPCREL(%rip)
   call void @llvm.memset.p0.i32(ptr %a, i8 %c, i32 %n, i1 false)
   ret void
 }

llvm/test/CodeGen/X86/pr44749.ll

 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc < %s -mtriple=x86_64-apple-macosx10.15.0 -O0 | FileCheck %s
 
 define i32 @a() {
 ; CHECK-LABEL: a:
 ; CHECK:       ## %bb.0: ## %entry
 ; CHECK-NEXT:    pushq %rax
 ; CHECK-NEXT:    .cfi_def_cfa_offset 16
 ; CHECK-NEXT:    xorl %eax, %eax
 ; CHECK-NEXT:    ## kill: def $al killed $al killed $eax
 ; CHECK-NEXT:    callq _b
 ; CHECK-NEXT:    cvtsi2sd %eax, %xmm1
 ; CHECK-NEXT:    movq _calloc@GOTPCREL(%rip), %rax
 ; CHECK-NEXT:    subq $-1, %rax
 ; CHECK-NEXT:    setne %al
 ; CHECK-NEXT:    movzbl %al, %eax
-; CHECK-NEXT:    movl %eax, %ecx
-; CHECK-NEXT:    leaq {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %rax
-; CHECK-NEXT:    movsd {{.*#+}} xmm0 = mem[0],zero
+; CHECK-NEXT:    cvtsi2sd %eax, %xmm0
+; CHECK-NEXT:    movsd {{.*#+}} xmm2 = mem[0],zero
+; CHECK-NEXT:    subsd %xmm2, %xmm0
 ; CHECK-NEXT:    movsd {{.*#+}} xmm3 = mem[0],zero
 ; CHECK-NEXT:    movsd {{.*#+}} xmm2 = mem[0],zero
 ; CHECK-NEXT:    cmplesd %xmm1, %xmm0
 ; CHECK-NEXT:    movaps %xmm0, %xmm1
 ; CHECK-NEXT:    andpd %xmm3, %xmm1
 ; CHECK-NEXT:    andnpd %xmm2, %xmm0
 ; CHECK-NEXT:    orpd %xmm1, %xmm0
 ; CHECK-NEXT:    cvttsd2si %xmm0, %eax
 ; CHECK-NEXT:    popq %rcx
 ; CHECK-NEXT:    retq
 entry:
   %call = call i32 (...) @b()
   %conv = sitofp i32 %call to double
-  %fsub = fsub double sitofp (i32 select (i1 icmp ne (ptr getelementptr (i8, ptr @calloc, i64 1), ptr null), i32 1, i32 0) to double), 1.000000e+02
+  %sel = select i1 icmp ne (ptr getelementptr (i8, ptr @calloc, i64 1), ptr null), i32 1, i32 0
+  %sitofp = sitofp i32 %sel to double
+  %fsub = fsub double %sitofp, 1.000000e+02
   %cmp = fcmp ole double %fsub, %conv
   %cond = select i1 %cmp, double 1.000000e+00, double 3.140000e+00
   %conv2 = fptosi double %cond to i32
   ret i32 %conv2
 }
 
 declare ptr @calloc(i64, i64)
 
 declare i32 @b(...)

llvm/test/ThinLTO/X86/funcattrs-prop-unknown.ll

entry:
   %0 = tail call ptr asm sideeffect "lea ff_h264_cabac_tables(%rip), $0", "=&r,~{dirflag},~{fpsr},~{flags}"()
   ret ptr %0
 }
 
 ; CHECK-NOT: ; Function Attrs:
 ; CHECK: define void @selectcallee() {
 define void @selectcallee() {
     ; Test calls that aren't handled either as direct or indirect.
-    call void select (i1 icmp eq (ptr @global, ptr null), ptr @f, ptr @g)()
+    call void getelementptr (i8, ptr @f, i64 ptrtoint (ptr @g to i64))()
     ret void
 }
 
 declare void @f()
 declare void @g()
 @global = extern_weak global i32

llvm/test/Transforms/InferAddressSpaces/AMDGPU/infer-address-space.ll

loop:                                             ; preds = %loop, %entry
   %exit_cond = icmp eq ptr %i2, %end
   br i1 %exit_cond, label %exit, label %loop
 
 exit:                                             ; preds = %loop
   ret void
 }
 
 ; CHECK-LABEL: @select_bug(
-; CHECK: %add.ptr157 = getelementptr inbounds i64, ptr undef, i64 select (i1 icmp ne (ptr inttoptr (i64 4873 to ptr), ptr null), i64 73, i64 93)
+; CHECK: %sel = select i1 icmp ne (ptr inttoptr (i64 4873 to ptr), ptr null), i64 73, i64 93
+; CHECK: %add.ptr157 = getelementptr inbounds i64, ptr undef, i64 %sel
 ; CHECK: %cmp169 = icmp uge ptr undef, %add.ptr157
 define void @select_bug() #0 {
-  %add.ptr157 = getelementptr inbounds i64, ptr undef, i64 select (i1 icmp ne (ptr inttoptr (i64 4873 to ptr), ptr null), i64 73, i64 93)
+  %sel = select i1 icmp ne (ptr inttoptr (i64 4873 to ptr), ptr null), i64 73, i64 93
+  %add.ptr157 = getelementptr inbounds i64, ptr undef, i64 %sel
   %cmp169 = icmp uge ptr undef, %add.ptr157
   unreachable
 }
 
 declare void @llvm.amdgcn.s.barrier() #1
 declare void @use(float) #0
 
 attributes #0 = { nounwind }
 attributes #1 = { convergent nounwind }

llvm/test/Transforms/InferAddressSpaces/AMDGPU/select.ll

define amdgpu_kernel void @store_select_mismatch_group_private_flat(i1 %c, ptr addrspace(3) %group.ptr.0, ptr addrspace(5) %private.ptr.1) #0 {
   %select = select i1 %c, ptr %cast0, ptr %cast1
   store i32 -1, ptr %select
   ret void
 }
 
 @lds0 = internal addrspace(3) global i32 123, align 4
 @lds1 = internal addrspace(3) global i32 456, align 4
 
-; CHECK-LABEL: @constexpr_select_group_flat(
-; CHECK: %tmp = load i32, ptr addrspace(3) select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspace(3) @lds0, ptr addrspace(3) @lds1)
-define i32 @constexpr_select_group_flat() #0 {
-bb:
-  %tmp = load i32, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) @lds0 to ptr), ptr addrspacecast (ptr addrspace(3) @lds1 to ptr))
-  ret i32 %tmp
-}
-
-; CHECK-LABEL: @constexpr_select_group_global_flat_mismatch(
-; CHECK: %tmp = load i32, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) @lds0 to ptr), ptr addrspacecast (ptr addrspace(1) @global0 to ptr))
-define i32 @constexpr_select_group_global_flat_mismatch() #0 {
-bb:
-  %tmp = load i32, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) @lds0 to ptr), ptr addrspacecast (ptr addrspace(1) @global0 to ptr))
-  ret i32 %tmp
-}
-
 ; CHECK-LABEL: @store_select_group_flat_null(
 ; CHECK: %select = select i1 %c, ptr addrspace(3) %group.ptr.0, ptr addrspace(3) addrspacecast (ptr null to ptr addrspace(3))
 ; CHECK: store i32 -1, ptr addrspace(3) %select
 define amdgpu_kernel void @store_select_group_flat_null(i1 %c, ptr addrspace(3) %group.ptr.0) #0 {
   %cast0 = addrspacecast ptr addrspace(3) %group.ptr.0 to ptr
   %select = select i1 %c, ptr %cast0, ptr null
   store i32 -1, ptr %select
   ret void

 ; CHECK: %select = select i1 %c, ptr addrspacecast (ptr addrspace(3) null to ptr), ptr addrspacecast (ptr addrspace(1) null to ptr)
 ; CHECK: store i32 7, ptr %select
 define amdgpu_kernel void @store_select_group_global_mismatch_null_null(i1 %c) #0 {
   %select = select i1 %c, ptr addrspacecast (ptr addrspace(3) null to ptr), ptr addrspacecast (ptr addrspace(1) null to ptr)
   store i32 7, ptr %select
   ret void
 }
 
-; CHECK-LABEL: @store_select_group_global_mismatch_null_null_constexpr(
-; CHECK: store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) null to ptr), ptr addrspacecast (ptr addrspace(1) null to ptr)), align 4
-define amdgpu_kernel void @store_select_group_global_mismatch_null_null_constexpr() #0 {
-  store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) null to ptr), ptr addrspacecast (ptr addrspace(1) null to ptr)), align 4
-  ret void
-}
-
-; CHECK-LABEL: @store_select_group_global_mismatch_gv_null_constexpr(
-; CHECK: store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) @lds0 to ptr), ptr addrspacecast (ptr addrspace(1) null to ptr)), align 4
-define amdgpu_kernel void @store_select_group_global_mismatch_gv_null_constexpr() #0 {
-  store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) @lds0 to ptr), ptr addrspacecast (ptr addrspace(1) null to ptr)), align 4
-  ret void
-}
-
-; CHECK-LABEL: @store_select_group_global_mismatch_null_gv_constexpr(
-; CHECK: store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) null to ptr), ptr addrspacecast (ptr addrspace(1) @global0 to ptr)), align 4
-define amdgpu_kernel void @store_select_group_global_mismatch_null_gv_constexpr() #0 {
-  store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) null to ptr), ptr addrspacecast (ptr addrspace(1) @global0 to ptr)), align 4
-  ret void
-}
-
-; CHECK-LABEL: @store_select_group_global_mismatch_inttoptr_null_constexpr(
-; CHECK: store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) inttoptr (i64 123 to ptr addrspace(3)) to ptr), ptr addrspacecast (ptr addrspace(1) null to ptr)), align 4
-define amdgpu_kernel void @store_select_group_global_mismatch_inttoptr_null_constexpr() #0 {
-  store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) inttoptr (i64 123 to ptr addrspace(3)) to ptr), ptr addrspacecast (ptr addrspace(1) null to ptr)), align 4
-  ret void
-}
-
-; CHECK-LABEL: @store_select_group_global_mismatch_inttoptr_flat_null_constexpr(
-; CHECK: store i32 7, ptr addrspace(1) select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspace(1) addrspacecast (ptr inttoptr (i64 123 to ptr) to ptr addrspace(1)), ptr addrspace(1) null), align 4
-define amdgpu_kernel void @store_select_group_global_mismatch_inttoptr_flat_null_constexpr() #0 {
-  store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr inttoptr (i64 123 to ptr), ptr addrspacecast (ptr addrspace(1) null to ptr)), align 4
-  ret void
-}
-
-; CHECK-LABEL: @store_select_group_global_mismatch_undef_undef_constexpr(
-; CHECK: store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) null to ptr), ptr undef), align 4
-define amdgpu_kernel void @store_select_group_global_mismatch_undef_undef_constexpr() #0 {
-  store i32 7, ptr select (i1 icmp eq (i32 ptrtoint (ptr addrspace(3) @lds1 to i32), i32 4), ptr addrspacecast (ptr addrspace(3) null to ptr), ptr addrspacecast (ptr addrspace(1) undef to ptr)), align 4
-  ret void
-}
-
 @lds2 = external addrspace(3) global [1024 x i32], align 4
 
 ; CHECK-LABEL: @store_select_group_constexpr_ptrtoint(
 ; CHECK: %cast0 = addrspacecast ptr addrspace(3) %group.ptr.0 to ptr
 ; CHECK: %select = select i1 %c, ptr %cast0, ptr addrspacecast (ptr addrspace(1) inttoptr (i32 add (i32 ptrtoint (ptr addrspace(3) @lds2 to i32), i32 124) to ptr addrspace(1)) to ptr)
 ; CHECK: store i32 7, ptr %select
 define amdgpu_kernel void @store_select_group_constexpr_ptrtoint(i1 %c, ptr addrspace(3) %group.ptr.0) #0 {
   %cast0 = addrspacecast ptr addrspace(3) %group.ptr.0 to ptr

llvm/test/Transforms/InstCombine/2010-03-03-ExtElim.ll

 ; CHECK: ret i1 true
 }
 
 @d = global i32 0, align 4
 @a = global [1 x i32] zeroinitializer, align 4
 
 define i1 @PR16462_1() nounwind {
 ; CHECK-LABEL: @PR16462_1(
-  ret i1 icmp sgt (i32 sext (i16 trunc (i32 select (i1 icmp eq (ptr @a, ptr @d), i32 0, i32 1) to i16) to i32), i32 65535)
+  %constexpr = select i1 icmp eq (ptr @a, ptr @d), i32 0, i32 1
+  %constexpr1 = trunc i32 %constexpr to i16
+  %constexpr2 = sext i16 %constexpr1 to i32
+  %constexpr3 = icmp sgt i32 %constexpr2, 65535
+  ret i1 %constexpr3
 ; CHECK: ret i1 false
 }
 
 define i1 @PR16462_2() nounwind {
 ; CHECK-LABEL: @PR16462_2(
-  ret i1 icmp sgt (i32 sext (i16 trunc (i32 select (i1 icmp eq (ptr @a, ptr @d), i32 0, i32 1) to i16) to i32), i32 42)
+  %constexpr = select i1 icmp eq (ptr @a, ptr @d), i32 0, i32 1
+  %constexpr1 = trunc i32 %constexpr to i16
+  %constexpr2 = icmp sgt i16 %constexpr1, 42
+  ret i1 %constexpr2
 ; CHECK: ret i1 false
 }

llvm/test/Transforms/InstCombine/cast.ll

 
 define i64 @PR28745() {
 ; BE-LABEL: @PR28745(
 ; BE-NEXT:    ret i64 1
 ;
 ; LE-LABEL: @PR28745(
 ; LE-NEXT:    ret i64 0
 ;
-  %e = extractvalue { i32 } select (i1 icmp eq (i16 extractelement (<2 x i16> bitcast (<1 x i32> <i32 1> to <2 x i16>), i32 0), i16 0), { i32 } { i32 1 }, { i32 } zeroinitializer), 0
+  %s = select i1 icmp eq (i16 extractelement (<2 x i16> bitcast (<1 x i32> <i32 1> to <2 x i16>), i32 0), i16 0), { i32 } { i32 1 }, { i32 } zeroinitializer
+  %e = extractvalue { i32 } %s, 0
   %b = zext i32 %e to i64
   ret i64 %b
 }
 
 define i32 @test89() {
 ; BE-LABEL: @test89(
 ; BE-NEXT:    ret i32 393216
 ;

llvm/test/Transforms/InstCombine/pr28725.ll

 ; RUN: opt -S -passes=instcombine < %s | FileCheck %s
 %S = type { i16, i32 }
 
 define <2 x i16> @test1() {
 entry:
-  %e = extractvalue %S select (i1 icmp eq (i16 extractelement (<2 x i16> bitcast (<1 x i32> <i32 1> to <2 x i16>), i32 0), i16 0), %S zeroinitializer, %S { i16 0, i32 1 }), 0
+  %s = select i1 icmp eq (i16 extractelement (<2 x i16> bitcast (<1 x i32> <i32 1> to <2 x i16>), i32 0), i16 0), %S zeroinitializer, %S { i16 0, i32 1 }
+  %e = extractvalue %S %s, 0
   %b = insertelement <2 x i16> <i16 undef, i16 0>, i16 %e, i32 0
   ret <2 x i16> %b
 }
 
 ; CHECK-LABEL: @test1(
 ; CHECK: ret <2 x i16> zeroinitializer

llvm/test/Transforms/InstSimplify/ConstProp/constant-expr.ll

 @pr9011_12 = constant <4 x i32> bitcast (i128 0 to <4 x i32>)
 ; CHECK: pr9011_12 = constant <4 x i32> zeroinitializer
 @pr9011_13 = constant i256 bitcast (<4 x double> zeroinitializer to i256)
 ; CHECK: pr9011_13 = constant i256 0
 @pr9011_14 = constant i128 bitcast (<4 x float> zeroinitializer to i128)
 ; CHECK: pr9011_14 = constant i128 0
 @pr9011_15 = constant i128 bitcast (<4 x i32> zeroinitializer to i128)
 ; CHECK: pr9011_15 = constant i128 0
-
-@select = internal constant
-          i32 select (i1 icmp ult (i32 ptrtoint (ptr @X to i32),
-                                   i32 ptrtoint (ptr @Y to i32)),
-            i32 select (i1 icmp ult (i32 ptrtoint (ptr @X to i32),
-                                     i32 ptrtoint (ptr @Y to i32)),
-               i32 10, i32 20),
-            i32 30)
-; CHECK: select = internal constant i32 select {{.*}} i32 10, i32 30

llvm/test/Transforms/InstSimplify/pr28725.ll

 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt -S -passes=instsimplify < %s | FileCheck %s
 %S = type { i16, i32 }
 
 ; InstCombine will be able to fold this into zeroinitializer
 define <2 x i16> @test1() {
 ; CHECK-LABEL: @test1(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[E:%.*]] = extractvalue [[S:%.*]] select (i1 icmp eq (i16 extractelement (<2 x i16> bitcast (<1 x i32> <i32 1> to <2 x i16>), i32 0), i16 0), [[S]] zeroinitializer, [[S]] { i16 0, i32 1 }), 0
+; CHECK-NEXT:    [[SEL:%.*]] = select i1 icmp eq (i16 extractelement (<2 x i16> bitcast (<1 x i32> <i32 1> to <2 x i16>), i32 0), i16 0), [[S:%.*]] zeroinitializer, [[S]] { i16 0, i32 1 }
+; CHECK-NEXT:    [[E:%.*]] = extractvalue [[S]] [[SEL]], 0
 ; CHECK-NEXT:    [[B:%.*]] = insertelement <2 x i16> <i16 undef, i16 0>, i16 [[E]], i32 0
 ; CHECK-NEXT:    ret <2 x i16> [[B]]
 ;
 entry:
-  %e = extractvalue %S select (i1 icmp eq (i16 extractelement (<2 x i16> bitcast (<1 x i32> <i32 1> to <2 x i16>), i32 0), i16 0), %S zeroinitializer, %S { i16 0, i32 1 }), 0
+  %sel = select i1 icmp eq (i16 extractelement (<2 x i16> bitcast (<1 x i32> <i32 1> to <2 x i16>), i32 0), i16 0), %S zeroinitializer, %S { i16 0, i32 1 }
+  %e = extractvalue %S %sel, 0
   %b = insertelement <2 x i16> <i16 undef, i16 0>, i16 %e, i32 0
   ret <2 x i16> %b
 }

llvm/unittests/Analysis/ValueTrackingTest.cpp

SmallVector<std::pair<std::pair<bool, bool>, std::string>, 32> Data = {
        "<4 x i32> <i32 0, i32 1, i32 2, i32 undef>"},
       {{false, true},
        "shufflevector <vscale x 4 x i32> %svx, "
        "<vscale x 4 x i32> %svx, <vscale x 4 x i32> undef"},
       {{true, false}, "call i32 @g(i32 %x)"},
       {{false, false}, "call noundef i32 @g(i32 %x)"},
       {{true, false}, "fcmp nnan oeq float %fx, %fy"},
       {{false, false}, "fcmp oeq float %fx, %fy"},
-      {{true, false},
-       "ashr <4 x i32> %vx, select (i1 icmp sgt (i32 ptrtoint (i32* @s to "
-       "i32), i32 1), <4 x i32> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 "
-       "2, i32 3>)"},
+      {{true, false}, "ashr i32 %x, ptrtoint (i32* @s to i32)"},
       {{false, false},
        "call {i32, i1} @llvm.sadd.with.overflow.i32(i32 %x, i32 %y)"},
       {{false, false},
        "call {i32, i1} @llvm.ssub.with.overflow.i32(i32 %x, i32 %y)"},
       {{false, false},
        "call {i32, i1} @llvm.smul.with.overflow.i32(i32 %x, i32 %y)"},
       {{false, false},
        "call {i32, i1} @llvm.uadd.with.overflow.i32(i32 %x, i32 %y)"},

llvm/unittests/IR/ConstantsTest.cpp

#define P6STR "bitcast (i32 ptrtoint (ptr @dummy2 to i32) to <2 x i16>)"
 
   CHECK(ConstantExpr::getSExt(P0, Int64Ty), "sext i32 " P0STR " to i64");
   CHECK(ConstantExpr::getZExt(P0, Int64Ty), "zext i32 " P0STR " to i64");
   CHECK(ConstantExpr::getFPTrunc(P2, FloatTy),
         "fptrunc double " P2STR " to float");
   CHECK(ConstantExpr::getFPExtend(P1, DoubleTy),
         "fpext float " P1STR " to double");
 
-  CHECK(ConstantExpr::getSelect(P3, P0, P4),
-        "select i1 " P3STR ", i32 " P0STR ", i32 " P4STR);
   CHECK(ConstantExpr::getICmp(CmpInst::ICMP_EQ, P0, P4),
         "icmp eq i32 " P0STR ", " P4STR);
   CHECK(ConstantExpr::getFCmp(CmpInst::FCMP_ULT, P1, P5),
         "fcmp ult float " P1STR ", " P5STR);
 
   std::vector<Constant *> V;
   V.push_back(One);
   // FIXME: getGetElementPtr() actually creates an inbounds ConstantGEP,