Index: include/llvm-c/Core.h =================================================================== --- include/llvm-c/Core.h +++ include/llvm-c/Core.h @@ -69,6 +69,7 @@ /* Standard Unary Operators */ LLVMFNeg = 66, + LLVMFreeze = 68, /* Standard Binary Operators */ LLVMAdd = 8, @@ -3746,6 +3747,7 @@ const char *Name); LLVMValueRef LLVMBuildFNeg(LLVMBuilderRef, LLVMValueRef V, const char *Name); LLVMValueRef LLVMBuildNot(LLVMBuilderRef, LLVMValueRef V, const char *Name); +LLVMValueRef LLVMBuildFreeze(LLVMBuilderRef, LLVMValueRef V, const char *Name); /* Memory */ LLVMValueRef LLVMBuildMalloc(LLVMBuilderRef, LLVMTypeRef Ty, const char *Name); Index: include/llvm/Bitcode/LLVMBitCodes.h =================================================================== --- include/llvm/Bitcode/LLVMBitCodes.h +++ include/llvm/Bitcode/LLVMBitCodes.h @@ -391,7 +391,8 @@ /// have no fixed relation to the LLVM IR enum values. Changing these will /// break compatibility with old files. enum UnaryOpcodes { - UNOP_NEG = 0 + UNOP_NEG = 0, + UNOP_FREEZE = 1 }; /// BinaryOpcodes - These are values used in the bitcode files to encode which Index: include/llvm/CodeGen/GlobalISel/IRTranslator.h =================================================================== --- include/llvm/CodeGen/GlobalISel/IRTranslator.h +++ include/llvm/CodeGen/GlobalISel/IRTranslator.h @@ -483,6 +483,9 @@ bool translateUserOp2(const User &U, MachineIRBuilder &MIRBuilder) { return false; } + bool translateFreeze(const User &U, MachineIRBuilder &MIRBuilder) { + return false; + } /// @} Index: include/llvm/IR/IRBuilder.h =================================================================== --- include/llvm/IR/IRBuilder.h +++ include/llvm/IR/IRBuilder.h @@ -2371,6 +2371,10 @@ return Insert(LandingPadInst::Create(Ty, NumClauses), Name); } + Value *CreateFreeze(Value *V, const Twine &Name = "") { + return Insert(UnaryOperator::CreateFreeze(V, Name)); + } + //===--------------------------------------------------------------------===// // Utility creation methods //===--------------------------------------------------------------------===// Index: include/llvm/IR/Instruction.def =================================================================== --- include/llvm/IR/Instruction.def +++ include/llvm/IR/Instruction.def @@ -140,84 +140,85 @@ // Standard unary operators... FIRST_UNARY_INST(12) HANDLE_UNARY_INST(12, FNeg , UnaryOperator) - LAST_UNARY_INST(12) +HANDLE_UNARY_INST(13, Freeze, UnaryOperator) + LAST_UNARY_INST(13) // Standard binary operators... - FIRST_BINARY_INST(13) -HANDLE_BINARY_INST(13, Add , BinaryOperator) -HANDLE_BINARY_INST(14, FAdd , BinaryOperator) -HANDLE_BINARY_INST(15, Sub , BinaryOperator) -HANDLE_BINARY_INST(16, FSub , BinaryOperator) -HANDLE_BINARY_INST(17, Mul , BinaryOperator) -HANDLE_BINARY_INST(18, FMul , BinaryOperator) -HANDLE_BINARY_INST(19, UDiv , BinaryOperator) -HANDLE_BINARY_INST(20, SDiv , BinaryOperator) -HANDLE_BINARY_INST(21, FDiv , BinaryOperator) -HANDLE_BINARY_INST(22, URem , BinaryOperator) -HANDLE_BINARY_INST(23, SRem , BinaryOperator) -HANDLE_BINARY_INST(24, FRem , BinaryOperator) + FIRST_BINARY_INST(14) +HANDLE_BINARY_INST(14, Add , BinaryOperator) +HANDLE_BINARY_INST(15, FAdd , BinaryOperator) +HANDLE_BINARY_INST(16, Sub , BinaryOperator) +HANDLE_BINARY_INST(17, FSub , BinaryOperator) +HANDLE_BINARY_INST(18, Mul , BinaryOperator) +HANDLE_BINARY_INST(19, FMul , BinaryOperator) +HANDLE_BINARY_INST(20, UDiv , BinaryOperator) +HANDLE_BINARY_INST(21, SDiv , BinaryOperator) +HANDLE_BINARY_INST(22, FDiv , BinaryOperator) +HANDLE_BINARY_INST(23, URem , BinaryOperator) +HANDLE_BINARY_INST(24, SRem , BinaryOperator) +HANDLE_BINARY_INST(25, FRem , BinaryOperator) // Logical operators (integer operands) -HANDLE_BINARY_INST(25, Shl , BinaryOperator) // Shift left (logical) -HANDLE_BINARY_INST(26, LShr , BinaryOperator) // Shift right (logical) -HANDLE_BINARY_INST(27, AShr , BinaryOperator) // Shift right (arithmetic) -HANDLE_BINARY_INST(28, And , BinaryOperator) -HANDLE_BINARY_INST(29, Or , BinaryOperator) -HANDLE_BINARY_INST(30, Xor , BinaryOperator) - LAST_BINARY_INST(30) +HANDLE_BINARY_INST(26, Shl , BinaryOperator) // Shift left (logical) +HANDLE_BINARY_INST(27, LShr , BinaryOperator) // Shift right (logical) +HANDLE_BINARY_INST(28, AShr , BinaryOperator) // Shift right (arithmetic) +HANDLE_BINARY_INST(29, And , BinaryOperator) +HANDLE_BINARY_INST(30, Or , BinaryOperator) +HANDLE_BINARY_INST(31, Xor , BinaryOperator) + LAST_BINARY_INST(31) // Memory operators... - FIRST_MEMORY_INST(31) -HANDLE_MEMORY_INST(31, Alloca, AllocaInst) // Stack management -HANDLE_MEMORY_INST(32, Load , LoadInst ) // Memory manipulation instrs -HANDLE_MEMORY_INST(33, Store , StoreInst ) -HANDLE_MEMORY_INST(34, GetElementPtr, GetElementPtrInst) -HANDLE_MEMORY_INST(35, Fence , FenceInst ) -HANDLE_MEMORY_INST(36, AtomicCmpXchg , AtomicCmpXchgInst ) -HANDLE_MEMORY_INST(37, AtomicRMW , AtomicRMWInst ) - LAST_MEMORY_INST(37) + FIRST_MEMORY_INST(32) +HANDLE_MEMORY_INST(32, Alloca, AllocaInst) // Stack management +HANDLE_MEMORY_INST(33, Load , LoadInst ) // Memory manipulation instrs +HANDLE_MEMORY_INST(34, Store , StoreInst ) +HANDLE_MEMORY_INST(35, GetElementPtr, GetElementPtrInst) +HANDLE_MEMORY_INST(36, Fence , FenceInst ) +HANDLE_MEMORY_INST(37, AtomicCmpXchg , AtomicCmpXchgInst ) +HANDLE_MEMORY_INST(38, AtomicRMW , AtomicRMWInst ) + LAST_MEMORY_INST(38) // Cast operators ... // NOTE: The order matters here because CastInst::isEliminableCastPair // NOTE: (see Instructions.cpp) encodes a table based on this ordering. - FIRST_CAST_INST(38) -HANDLE_CAST_INST(38, Trunc , TruncInst ) // Truncate integers -HANDLE_CAST_INST(39, ZExt , ZExtInst ) // Zero extend integers -HANDLE_CAST_INST(40, SExt , SExtInst ) // Sign extend integers -HANDLE_CAST_INST(41, FPToUI , FPToUIInst ) // floating point -> UInt -HANDLE_CAST_INST(42, FPToSI , FPToSIInst ) // floating point -> SInt -HANDLE_CAST_INST(43, UIToFP , UIToFPInst ) // UInt -> floating point -HANDLE_CAST_INST(44, SIToFP , SIToFPInst ) // SInt -> floating point -HANDLE_CAST_INST(45, FPTrunc , FPTruncInst ) // Truncate floating point -HANDLE_CAST_INST(46, FPExt , FPExtInst ) // Extend floating point -HANDLE_CAST_INST(47, PtrToInt, PtrToIntInst) // Pointer -> Integer -HANDLE_CAST_INST(48, IntToPtr, IntToPtrInst) // Integer -> Pointer -HANDLE_CAST_INST(49, BitCast , BitCastInst ) // Type cast -HANDLE_CAST_INST(50, AddrSpaceCast, AddrSpaceCastInst) // addrspace cast - LAST_CAST_INST(50) - - FIRST_FUNCLETPAD_INST(51) -HANDLE_FUNCLETPAD_INST(51, CleanupPad, CleanupPadInst) -HANDLE_FUNCLETPAD_INST(52, CatchPad , CatchPadInst) - LAST_FUNCLETPAD_INST(52) + FIRST_CAST_INST(39) +HANDLE_CAST_INST(39, Trunc , TruncInst ) // Truncate integers +HANDLE_CAST_INST(40, ZExt , ZExtInst ) // Zero extend integers +HANDLE_CAST_INST(41, SExt , SExtInst ) // Sign extend integers +HANDLE_CAST_INST(42, FPToUI , FPToUIInst ) // floating point -> UInt +HANDLE_CAST_INST(43, FPToSI , FPToSIInst ) // floating point -> SInt +HANDLE_CAST_INST(44, UIToFP , UIToFPInst ) // UInt -> floating point +HANDLE_CAST_INST(45, SIToFP , SIToFPInst ) // SInt -> floating point +HANDLE_CAST_INST(46, FPTrunc , FPTruncInst ) // Truncate floating point +HANDLE_CAST_INST(47, FPExt , FPExtInst ) // Extend floating point +HANDLE_CAST_INST(48, PtrToInt, PtrToIntInst) // Pointer -> Integer +HANDLE_CAST_INST(49, IntToPtr, IntToPtrInst) // Integer -> Pointer +HANDLE_CAST_INST(50, BitCast , BitCastInst ) // Type cast +HANDLE_CAST_INST(51, AddrSpaceCast, AddrSpaceCastInst) // addrspace cast + LAST_CAST_INST(51) + + FIRST_FUNCLETPAD_INST(52) +HANDLE_FUNCLETPAD_INST(52, CleanupPad, CleanupPadInst) +HANDLE_FUNCLETPAD_INST(53, CatchPad , CatchPadInst) + LAST_FUNCLETPAD_INST(53) // Other operators... - FIRST_OTHER_INST(53) -HANDLE_OTHER_INST(53, ICmp , ICmpInst ) // Integer comparison instruction -HANDLE_OTHER_INST(54, FCmp , FCmpInst ) // Floating point comparison instr. -HANDLE_OTHER_INST(55, PHI , PHINode ) // PHI node instruction -HANDLE_OTHER_INST(56, Call , CallInst ) // Call a function -HANDLE_OTHER_INST(57, Select , SelectInst ) // select instruction -HANDLE_USER_INST (58, UserOp1, Instruction) // May be used internally in a pass -HANDLE_USER_INST (59, UserOp2, Instruction) // Internal to passes only -HANDLE_OTHER_INST(60, VAArg , VAArgInst ) // vaarg instruction -HANDLE_OTHER_INST(61, ExtractElement, ExtractElementInst)// extract from vector -HANDLE_OTHER_INST(62, InsertElement, InsertElementInst) // insert into vector -HANDLE_OTHER_INST(63, ShuffleVector, ShuffleVectorInst) // shuffle two vectors. -HANDLE_OTHER_INST(64, ExtractValue, ExtractValueInst)// extract from aggregate -HANDLE_OTHER_INST(65, InsertValue, InsertValueInst) // insert into aggregate -HANDLE_OTHER_INST(66, LandingPad, LandingPadInst) // Landing pad instruction. - LAST_OTHER_INST(66) + FIRST_OTHER_INST(54) +HANDLE_OTHER_INST(54, ICmp , ICmpInst ) // Integer comparison instruction +HANDLE_OTHER_INST(55, FCmp , FCmpInst ) // Floating point comparison instr. +HANDLE_OTHER_INST(56, PHI , PHINode ) // PHI node instruction +HANDLE_OTHER_INST(57, Call , CallInst ) // Call a function +HANDLE_OTHER_INST(58, Select , SelectInst ) // select instruction +HANDLE_USER_INST (59, UserOp1, Instruction) // May be used internally in a pass +HANDLE_USER_INST (60, UserOp2, Instruction) // Internal to passes only +HANDLE_OTHER_INST(61, VAArg , VAArgInst ) // vaarg instruction +HANDLE_OTHER_INST(62, ExtractElement, ExtractElementInst)// extract from vector +HANDLE_OTHER_INST(63, InsertElement, InsertElementInst) // insert into vector +HANDLE_OTHER_INST(64, ShuffleVector, ShuffleVectorInst) // shuffle two vectors. +HANDLE_OTHER_INST(65, ExtractValue, ExtractValueInst)// extract from aggregate +HANDLE_OTHER_INST(66, InsertValue, InsertValueInst) // insert into aggregate +HANDLE_OTHER_INST(67, LandingPad, LandingPadInst) // Landing pad instruction. + LAST_OTHER_INST(67) #undef FIRST_TERM_INST #undef HANDLE_TERM_INST Index: include/llvm/IR/PatternMatch.h =================================================================== --- include/llvm/IR/PatternMatch.h +++ include/llvm/IR/PatternMatch.h @@ -816,6 +816,28 @@ return m_FSub(m_AnyZeroFP(), X); } +template struct Freeze_match { + Op_t X; + + Freeze_match(const Op_t &Op) : X(Op) {} + template bool match(OpTy *V) { + auto *I = dyn_cast(V); + if (!I) return false; + + if (I->getOpcode() == Instruction::Freeze) + return X.match(I->getOperand(0)); + + return false; + } +}; + +/// Matches freeze. +template +inline Freeze_match +m_Freeze(const OpTy &X) { + return Freeze_match(X); +} + template inline BinaryOp_match m_Mul(const LHS &L, const RHS &R) { Index: lib/AsmParser/LLLexer.cpp =================================================================== --- lib/AsmParser/LLLexer.cpp +++ lib/AsmParser/LLLexer.cpp @@ -835,6 +835,7 @@ } while (false) INSTKEYWORD(fneg, FNeg); + INSTKEYWORD(freeze, Freeze); INSTKEYWORD(add, Add); INSTKEYWORD(fadd, FAdd); INSTKEYWORD(sub, Sub); INSTKEYWORD(fsub, FSub); Index: lib/AsmParser/LLParser.cpp =================================================================== --- lib/AsmParser/LLParser.cpp +++ lib/AsmParser/LLParser.cpp @@ -3405,7 +3405,8 @@ } // Unary Operators. - case lltok::kw_fneg: { + case lltok::kw_fneg: + case lltok::kw_freeze: { unsigned Opc = Lex.getUIntVal(); Constant *Val; Lex.Lex(); @@ -3420,6 +3421,8 @@ if (!Val->getType()->isFPOrFPVectorTy()) return Error(ID.Loc, "constexpr requires fp operands"); break; + case Instruction::Freeze: + break; default: llvm_unreachable("Unknown unary operator!"); } unsigned Flags = 0; @@ -5713,6 +5716,7 @@ Inst->setFastMathFlags(FMF); return false; } + case lltok::kw_freeze: return ParseUnaryOp(Inst, PFS, KeywordVal, false); // Binary Operators. case lltok::kw_add: case lltok::kw_sub: @@ -6316,16 +6320,14 @@ /// ParseUnaryOp /// ::= UnaryOp TypeAndValue ',' Value /// -/// If IsFP is false, then any integer operand is allowed, if it is true, any fp -/// operand is allowed. +/// If IsFP is true, then fp operand is only allowed. bool LLParser::ParseUnaryOp(Instruction *&Inst, PerFunctionState &PFS, unsigned Opc, bool IsFP) { LocTy Loc; Value *LHS; if (ParseTypeAndValue(LHS, Loc, PFS)) return true; - bool Valid = IsFP ? LHS->getType()->isFPOrFPVectorTy() - : LHS->getType()->isIntOrIntVectorTy(); + bool Valid = !IsFP || LHS->getType()->isFPOrFPVectorTy(); if (!Valid) return Error(Loc, "invalid operand type for instruction"); Index: lib/AsmParser/LLToken.h =================================================================== --- lib/AsmParser/LLToken.h +++ lib/AsmParser/LLToken.h @@ -277,6 +277,7 @@ // Instruction Opcodes (Opcode in UIntVal). kw_fneg, + kw_freeze, kw_add, kw_fadd, kw_sub, Index: lib/Bitcode/Reader/BitcodeReader.cpp =================================================================== --- lib/Bitcode/Reader/BitcodeReader.cpp +++ lib/Bitcode/Reader/BitcodeReader.cpp @@ -1055,16 +1055,14 @@ } static int getDecodedUnaryOpcode(unsigned Val, Type *Ty) { - bool IsFP = Ty->isFPOrFPVectorTy(); - // UnOps are only valid for int/fp or vector of int/fp types - if (!IsFP && !Ty->isIntOrIntVectorTy()) - return -1; - switch (Val) { default: return -1; case bitc::UNOP_NEG: - return IsFP ? Instruction::FNeg : -1; + // fneg only takes fp or vector of fp types + return Ty->isFPOrFPVectorTy() ? Instruction::FNeg : -1; + case bitc::UNOP_FREEZE: + return Instruction::Freeze; } } @@ -3865,7 +3863,7 @@ case bitc::FUNC_CODE_INST_UNOP: { // UNOP: [opval, ty, opcode] unsigned OpNum = 0; Value *LHS; - if (getValueTypePair(Record, OpNum, NextValueNo, LHS) || + if (getValueTypePair(Record, OpNum, NextValueNo, LHS, &FullTy) || OpNum+1 > Record.size()) return error("Invalid record"); Index: lib/Bitcode/Writer/BitcodeWriter.cpp =================================================================== --- lib/Bitcode/Writer/BitcodeWriter.cpp +++ lib/Bitcode/Writer/BitcodeWriter.cpp @@ -519,8 +519,9 @@ static unsigned getEncodedUnaryOpcode(unsigned Opcode) { switch (Opcode) { - default: llvm_unreachable("Unknown binary instruction!"); + default: llvm_unreachable("Unknown unary instruction!"); case Instruction::FNeg: return bitc::UNOP_NEG; + case Instruction::Freeze: return bitc::UNOP_FREEZE; } } @@ -2433,6 +2434,17 @@ Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); Record.push_back(VE.getValueID(C->getOperand(0))); AbbrevToUse = CONSTANTS_CE_CAST_Abbrev; + } else if (Instruction::isUnaryOp(CE->getOpcode())) { + assert(CE->getNumOperands() == 1 && "Unknown constant expr!"); + Code = bitc::CST_CODE_CE_UNOP; + Record.push_back(getEncodedUnaryOpcode(CE->getOpcode())); + Record.push_back(VE.getValueID(C->getOperand(0))); + uint64_t Flags = getOptimizationFlags(CE); + if (Flags != 0) { + assert(CE->getOpcode() == Instruction::FNeg); + Record.push_back(Flags); + } + break; } else { assert(CE->getNumOperands() == 2 && "Unknown constant expr!"); Code = bitc::CST_CODE_CE_BINOP; @@ -2444,16 +2456,6 @@ Record.push_back(Flags); } break; - case Instruction::FNeg: { - assert(CE->getNumOperands() == 1 && "Unknown constant expr!"); - Code = bitc::CST_CODE_CE_UNOP; - Record.push_back(getEncodedUnaryOpcode(CE->getOpcode())); - Record.push_back(VE.getValueID(C->getOperand(0))); - uint64_t Flags = getOptimizationFlags(CE); - if (Flags != 0) - Record.push_back(Flags); - break; - } case Instruction::GetElementPtr: { Code = bitc::CST_CODE_CE_GEP; const auto *GO = cast(C); @@ -2611,6 +2613,17 @@ AbbrevToUse = FUNCTION_INST_CAST_ABBREV; Vals.push_back(VE.getTypeID(I.getType())); Vals.push_back(getEncodedCastOpcode(I.getOpcode())); + } else if (isa(I)) { + Code = bitc::FUNC_CODE_INST_UNOP; + if (!pushValueAndType(I.getOperand(0), InstID, Vals)) + AbbrevToUse = FUNCTION_INST_UNOP_ABBREV; + Vals.push_back(getEncodedUnaryOpcode(I.getOpcode())); + uint64_t Flags = getOptimizationFlags(&I); + if (Flags != 0) { + if (AbbrevToUse == FUNCTION_INST_UNOP_ABBREV) + AbbrevToUse = FUNCTION_INST_UNOP_FLAGS_ABBREV; + Vals.push_back(Flags); + } } else { assert(isa(I) && "Unknown instruction!"); Code = bitc::FUNC_CODE_INST_BINOP; @@ -2626,19 +2639,6 @@ } } break; - case Instruction::FNeg: { - Code = bitc::FUNC_CODE_INST_UNOP; - if (!pushValueAndType(I.getOperand(0), InstID, Vals)) - AbbrevToUse = FUNCTION_INST_UNOP_ABBREV; - Vals.push_back(getEncodedUnaryOpcode(I.getOpcode())); - uint64_t Flags = getOptimizationFlags(&I); - if (Flags != 0) { - if (AbbrevToUse == FUNCTION_INST_UNOP_ABBREV) - AbbrevToUse = FUNCTION_INST_UNOP_FLAGS_ABBREV; - Vals.push_back(Flags); - } - break; - } case Instruction::GetElementPtr: { Code = bitc::FUNC_CODE_INST_GEP; AbbrevToUse = FUNCTION_INST_GEP_ABBREV; Index: lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h =================================================================== --- lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h +++ lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h @@ -668,6 +668,7 @@ void visitUnary(const User &I, unsigned Opcode); void visitFNeg(const User &I) { visitUnary(I, ISD::FNEG); } + void visitFreeze(const User &I); void visitBinary(const User &I, unsigned Opcode); void visitShift(const User &I, unsigned Opcode); Index: lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp =================================================================== --- lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -10541,3 +10541,8 @@ lowerWorkItem(W, SI.getCondition(), SwitchMBB, DefaultMBB); } } + +void SelectionDAGBuilder::visitFreeze(const User &I) { + SDValue N = getValue(I.getOperand(0)); + setValue(&I, N); +} Index: lib/CodeGen/TargetLoweringBase.cpp =================================================================== --- lib/CodeGen/TargetLoweringBase.cpp +++ lib/CodeGen/TargetLoweringBase.cpp @@ -1629,6 +1629,7 @@ case ExtractValue: return ISD::MERGE_VALUES; case InsertValue: return ISD::MERGE_VALUES; case LandingPad: return 0; + case Freeze: return 0; } llvm_unreachable("Unknown instruction type encountered!"); Index: lib/IR/ConstantFold.cpp =================================================================== --- lib/IR/ConstantFold.cpp +++ lib/IR/ConstantFold.cpp @@ -921,31 +921,22 @@ Constant *llvm::ConstantFoldUnaryInstruction(unsigned Opcode, Constant *C) { assert(Instruction::isUnaryOp(Opcode) && "Non-unary instruction detected"); + switch (static_cast(Opcode)) { + case Instruction::FNeg: { // Handle scalar UndefValue. Vectors are always evaluated per element. bool HasScalarUndef = !C->getType()->isVectorTy() && isa(C); if (HasScalarUndef) { - switch (static_cast(Opcode)) { - case Instruction::FNeg: return C; // -undef -> undef - case Instruction::UnaryOpsEnd: - llvm_unreachable("Invalid UnaryOp"); - } } // Constant should not be UndefValue, unless these are vector constants. assert(!HasScalarUndef && "Unexpected UndefValue"); - // We only have FP UnaryOps right now. assert(!isa(C) && "Unexpected Integer UnaryOp"); if (ConstantFP *CFP = dyn_cast(C)) { const APFloat &CV = CFP->getValueAPF(); - switch (Opcode) { - default: - break; - case Instruction::FNeg: return ConstantFP::get(C->getContext(), neg(CV)); - } } else if (VectorType *VTy = dyn_cast(C->getType())) { // Fold each element and create a vector constant from those constants. SmallVector Result; @@ -959,6 +950,22 @@ return ConstantVector::get(Result); } + break; + } + case Instruction::Freeze: { + if (ConstantFP *CFP = dyn_cast(C)) { + return CFP; + } else if (ConstantInt *CINT = dyn_cast(C)) { + return CINT; + } else if (GlobalVariable *GV = dyn_cast(C)) { + // A global variable is neither undef nor poison. + return GV; + } + break; + } + case Instruction::UnaryOpsEnd: + llvm_unreachable("Invalid UnaryOp"); + } // We don't know how to fold this. return nullptr; Index: lib/IR/Core.cpp =================================================================== --- lib/IR/Core.cpp +++ lib/IR/Core.cpp @@ -3410,6 +3410,11 @@ return wrap(unwrap(B)->CreateFNeg(unwrap(V), Name)); } +LLVMValueRef LLVMBuildFreeze(LLVMBuilderRef B, LLVMValueRef V, + const char *Name) { + return wrap(unwrap(B)->CreateFreeze(unwrap(V), Name)); +} + LLVMValueRef LLVMBuildNot(LLVMBuilderRef B, LLVMValueRef V, const char *Name) { return wrap(unwrap(B)->CreateNot(unwrap(V), Name)); } Index: lib/IR/Instruction.cpp =================================================================== --- lib/IR/Instruction.cpp +++ lib/IR/Instruction.cpp @@ -307,6 +307,7 @@ // Standard unary operators... case FNeg: return "fneg"; + case Freeze: return "freeze"; // Standard binary operators... case Add: return "add"; Index: lib/IR/Instructions.cpp =================================================================== --- lib/IR/Instructions.cpp +++ lib/IR/Instructions.cpp @@ -2234,6 +2234,9 @@ "Tried to create a floating-point operation on a " "non-floating-point type!"); break; + case Freeze: + // Freeze can take any type as an argument. + break; default: llvm_unreachable("Invalid opcode provided"); } #endif Index: lib/IR/Verifier.cpp =================================================================== --- lib/IR/Verifier.cpp +++ lib/IR/Verifier.cpp @@ -3138,6 +3138,9 @@ Assert(U.getType()->isFPOrFPVectorTy(), "FNeg operator only works with float types!", &U); break; + case Instruction::Freeze: + // Freeze can take all kinds of types. + break; default: llvm_unreachable("Unknown UnaryOperator opcode!"); } Index: test/Bindings/llvm-c/freeze.ll =================================================================== --- /dev/null +++ test/Bindings/llvm-c/freeze.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | llvm-dis > %t.orig +; RUN: llvm-as < %s | llvm-c-test --echo > %t.echo +; RUN: diff -w %t.orig %t.echo + +define i32 @f(i32 %arg, <2 x i32> %arg2, float %arg3, <2 x float> %arg4, i8* %arg5) { + %1 = freeze i32 %arg + %2 = freeze i32 10 + %3 = freeze i32 %1 + %4 = freeze <2 x i32> %arg2 + %5 = freeze float %arg3 + %6 = freeze <2 x float> %arg4 + %7 = freeze i8* %arg5 + ret i32 %1 +} Index: test/Bitcode/compatibility.ll =================================================================== --- test/Bitcode/compatibility.ll +++ test/Bitcode/compatibility.ll @@ -1102,9 +1102,17 @@ } ; Instructions -- Unary Operations -define void @instructions.unops(double %op1) { +define void @instructions.unops(double %op1, i32 %op2, <2 x i32> %op3, i8* %op4) { fneg double %op1 ; CHECK: fneg double %op1 + freeze i32 %op2 + ; CHECK: freeze i32 %op2 + freeze double %op1 + ; CHECK: freeze double %op1 + freeze <2 x i32> %op3 + ; CHECK: freeze <2 x i32> %op3 + freeze i8* %op4 + ; CHECK: freeze i8* %op4 ret void } @@ -1752,6 +1760,10 @@ ret i8** getelementptr inbounds ({ [4 x i8*], [4 x i8*] }, { [4 x i8*], [4 x i8*] }* null, i32 0, inrange i32 1, i32 2) } +define i64 @constexpr_freeze() { + ret i64 freeze (i64 32) +} + ; immarg attribute declare void @llvm.test.immarg.intrinsic(i32 immarg) ; CHECK: declare void @llvm.test.immarg.intrinsic(i32 immarg) Index: tools/llvm-c-test/echo.cpp =================================================================== --- tools/llvm-c-test/echo.cpp +++ tools/llvm-c-test/echo.cpp @@ -748,6 +748,11 @@ Dst = LLVMBuildInsertValue(Builder, Agg, V, I, Name); break; } + case LLVMFreeze: { + LLVMValueRef Arg = CloneValue(LLVMGetOperand(Src, 0)); + Dst = LLVMBuildFreeze(Builder, Arg, Name); + break; + } default: break; }