diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/ADT/DenseMap.h | 6 | ||||
| -rw-r--r-- | include/llvm/ADT/VariadicFunction.h | 2 | ||||
| -rw-r--r-- | include/llvm/Analysis/BranchProbabilityInfo.h | 1 | ||||
| -rw-r--r-- | include/llvm/Analysis/Dominators.h | 15 | ||||
| -rw-r--r-- | include/llvm/CodeGen/MachineInstr.h | 6 | ||||
| -rw-r--r-- | include/llvm/CodeGen/SelectionDAGNodes.h | 10 | ||||
| -rw-r--r-- | include/llvm/IntrinsicsHexagon.td | 2 | ||||
| -rw-r--r-- | include/llvm/MC/MCFixedLenDisassembler.h | 32 | ||||
| -rw-r--r-- | include/llvm/MC/MCInstrDesc.h | 7 | ||||
| -rw-r--r-- | include/llvm/Support/AlignOf.h | 27 | ||||
| -rw-r--r-- | include/llvm/Support/COFF.h | 6 | ||||
| -rw-r--r-- | include/llvm/Support/Compiler.h | 19 | ||||
| -rw-r--r-- | include/llvm/Support/FileSystem.h | 77 | ||||
| -rw-r--r-- | include/llvm/Support/LEB128.h | 41 | ||||
| -rw-r--r-- | include/llvm/Support/NoFolder.h | 12 | ||||
| -rw-r--r-- | include/llvm/Target/Target.td | 19 | ||||
| -rw-r--r-- | include/llvm/Target/TargetInstrInfo.h | 45 |
17 files changed, 300 insertions, 27 deletions
diff --git a/include/llvm/ADT/DenseMap.h b/include/llvm/ADT/DenseMap.h index 65a70fb..f60d688 100644 --- a/include/llvm/ADT/DenseMap.h +++ b/include/llvm/ADT/DenseMap.h @@ -687,8 +687,7 @@ class SmallDenseMap /// A "union" of an inline bucket array and the struct representing /// a large bucket. This union will be discriminated by the 'Small' bit. - typename AlignedCharArray<BucketT[InlineBuckets], LargeRep>::union_type - storage; + AlignedCharArrayUnion<BucketT[InlineBuckets], LargeRep> storage; public: explicit SmallDenseMap(unsigned NumInitBuckets = 0) { @@ -834,8 +833,7 @@ public: return; // Nothing to do. // First move the inline buckets into a temporary storage. - typename AlignedCharArray<BucketT[InlineBuckets]>::union_type - TmpStorage; + AlignedCharArrayUnion<BucketT[InlineBuckets]> TmpStorage; BucketT *TmpBegin = reinterpret_cast<BucketT *>(TmpStorage.buffer); BucketT *TmpEnd = TmpBegin; diff --git a/include/llvm/ADT/VariadicFunction.h b/include/llvm/ADT/VariadicFunction.h index a9a0dc6..a7f83a6 100644 --- a/include/llvm/ADT/VariadicFunction.h +++ b/include/llvm/ADT/VariadicFunction.h @@ -206,7 +206,7 @@ struct VariadicFunction2 { ResultT operator()(Param0T P0, Param1T P1, \ LLVM_COMMA_JOIN ## N(const ArgT &A)) const { \ const ArgT *const Args[] = { LLVM_COMMA_JOIN ## N(&A) }; \ - return Func(P0, P1, makeAraryRef(Args)); \ + return Func(P0, P1, makeArrayRef(Args)); \ } LLVM_DEFINE_OVERLOAD(1) LLVM_DEFINE_OVERLOAD(2) diff --git a/include/llvm/Analysis/BranchProbabilityInfo.h b/include/llvm/Analysis/BranchProbabilityInfo.h index 2ced796..006daa0 100644 --- a/include/llvm/Analysis/BranchProbabilityInfo.h +++ b/include/llvm/Analysis/BranchProbabilityInfo.h @@ -122,6 +122,7 @@ private: bool calcLoopBranchHeuristics(BasicBlock *BB); bool calcZeroHeuristics(BasicBlock *BB); bool calcFloatingPointHeuristics(BasicBlock *BB); + bool calcInvokeHeuristics(BasicBlock *BB); }; } diff --git a/include/llvm/Analysis/Dominators.h b/include/llvm/Analysis/Dominators.h index 1289edd..a1cc196 100644 --- a/include/llvm/Analysis/Dominators.h +++ b/include/llvm/Analysis/Dominators.h @@ -705,7 +705,20 @@ DominatorTreeBase<NodeT>::properlyDominates(const NodeT *A, const NodeT *B) { EXTERN_TEMPLATE_INSTANTIATION(class DominatorTreeBase<BasicBlock>); -class BasicBlockEdge; +class BasicBlockEdge { + const BasicBlock *Start; + const BasicBlock *End; +public: + BasicBlockEdge(const BasicBlock *Start_, const BasicBlock *End_) : + Start(Start_), End(End_) { } + const BasicBlock *getStart() const { + return Start; + } + const BasicBlock *getEnd() const { + return End; + } + bool isSingleEdge() const; +}; //===------------------------------------- /// DominatorTree Class - Concrete subclass of DominatorTreeBase that is used to diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h index 4c5eb8b..27756ab 100644 --- a/include/llvm/CodeGen/MachineInstr.h +++ b/include/llvm/CodeGen/MachineInstr.h @@ -420,6 +420,12 @@ public: return hasProperty(MCID::Bitcast, Type); } + /// isSelect - Return true if this instruction is a select instruction. + /// + bool isSelect(QueryType Type = IgnoreBundle) const { + return hasProperty(MCID::Select, Type); + } + /// isNotDuplicable - Return true if this instruction cannot be safely /// duplicated. For example, if the instruction has a unique labels attached /// to it, duplicating it would cause multiple definition errors. diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h index 0dfb394..db361ee 100644 --- a/include/llvm/CodeGen/SelectionDAGNodes.h +++ b/include/llvm/CodeGen/SelectionDAGNodes.h @@ -146,7 +146,8 @@ public: inline bool isMachineOpcode() const; inline unsigned getMachineOpcode() const; inline const DebugLoc getDebugLoc() const; - + inline void dump() const; + inline void dumpr() const; /// reachesChainWithoutSideEffects - Return true if this operand (which must /// be a chain) reaches the specified operand without crossing any @@ -806,7 +807,12 @@ inline bool SDValue::hasOneUse() const { inline const DebugLoc SDValue::getDebugLoc() const { return Node->getDebugLoc(); } - +inline void SDValue::dump() const { + return Node->dump(); +} +inline void SDValue::dumpr() const { + return Node->dumpr(); +} // Define inline functions from the SDUse class. inline void SDUse::set(const SDValue &V) { diff --git a/include/llvm/IntrinsicsHexagon.td b/include/llvm/IntrinsicsHexagon.td index efd04f3..8a88729 100644 --- a/include/llvm/IntrinsicsHexagon.td +++ b/include/llvm/IntrinsicsHexagon.td @@ -15,7 +15,7 @@ // // All Hexagon intrinsics start with "llvm.hexagon.". let TargetPrefix = "hexagon" in { - /// Hexagon_Intrinsic - Base class for all altivec intrinsics. + /// Hexagon_Intrinsic - Base class for all Hexagon intrinsics. class Hexagon_Intrinsic<string GCCIntSuffix, list<LLVMType> ret_types, list<LLVMType> param_types, list<IntrinsicProperty> properties> diff --git a/include/llvm/MC/MCFixedLenDisassembler.h b/include/llvm/MC/MCFixedLenDisassembler.h new file mode 100644 index 0000000..22b3c32 --- /dev/null +++ b/include/llvm/MC/MCFixedLenDisassembler.h @@ -0,0 +1,32 @@ +//===-- llvm/MC/MCFixedLenDisassembler.h - Decoder driver -------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// Fixed length disassembler decoder state machine driver. +//===----------------------------------------------------------------------===// +#ifndef MCFIXEDLENDISASSEMBLER_H +#define MCFIXEDLENDISASSEMBLER_H + +namespace llvm { + +namespace MCD { +// Disassembler state machine opcodes. +enum DecoderOps { + OPC_ExtractField = 1, // OPC_ExtractField(uint8_t Start, uint8_t Len) + OPC_FilterValue, // OPC_FilterValue(uleb128 Val, uint16_t NumToSkip) + OPC_CheckField, // OPC_CheckField(uint8_t Start, uint8_t Len, + // uleb128 Val, uint16_t NumToSkip) + OPC_CheckPredicate, // OPC_CheckPredicate(uleb128 PIdx, uint16_t NumToSkip) + OPC_Decode, // OPC_Decode(uleb128 Opcode, uleb128 DIdx) + OPC_SoftFail, // OPC_SoftFail(uleb128 PMask, uleb128 NMask) + OPC_Fail // OPC_Fail() +}; + +} // namespace MCDecode +} // namespace llvm + +#endif diff --git a/include/llvm/MC/MCInstrDesc.h b/include/llvm/MC/MCInstrDesc.h index 186612d..dbf16d8 100644 --- a/include/llvm/MC/MCInstrDesc.h +++ b/include/llvm/MC/MCInstrDesc.h @@ -107,6 +107,7 @@ namespace MCID { Compare, MoveImm, Bitcast, + Select, DelaySlot, FoldableAsLoad, MayLoad, @@ -282,6 +283,12 @@ public: return Flags & (1 << MCID::Bitcast); } + /// isSelect - Return true if this is a select instruction. + /// + bool isSelect() const { + return Flags & (1 << MCID::Select); + } + /// isNotDuplicable - Return true if this instruction cannot be safely /// duplicated. For example, if the instruction has a unique labels attached /// to it, duplicating it would cause multiple definition errors. diff --git a/include/llvm/Support/AlignOf.h b/include/llvm/Support/AlignOf.h index 85607c8..cf71251 100644 --- a/include/llvm/Support/AlignOf.h +++ b/include/llvm/Support/AlignOf.h @@ -107,8 +107,8 @@ LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(8192); // Any larger and MSVC complains. #undef LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT -/// \brief This class template exposes a typedef for type containing a suitable -/// aligned character array to hold elements of any of up to four types. +/// \brief This union template exposes a suitably aligned and sized character +/// array member which can hold elements of any of up to four types. /// /// These types may be arrays, structs, or any other types. The goal is to /// produce a union type containing a character array which, when used, forms @@ -116,7 +116,8 @@ LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(8192); /// than four types can be added at the cost of more boiler plate. template <typename T1, typename T2 = char, typename T3 = char, typename T4 = char> -class AlignedCharArray { +union AlignedCharArrayUnion { +private: class AlignerImpl { T1 t1; T2 t2; T3 t3; T4 t4; @@ -127,6 +128,12 @@ class AlignedCharArray { }; public: + /// \brief The character array buffer for use by clients. + /// + /// No other member of this union should be referenced. The exist purely to + /// constrain the layout of this character array. + char buffer[sizeof(SizerImpl)]; + // Sadly, Clang and GCC both fail to align a character array properly even // with an explicit alignment attribute. To work around this, we union // the character array that will actually be used with a struct that contains @@ -134,16 +141,10 @@ public: // and GCC will properly register the alignment of a struct containing an // aligned member, and this alignment should carry over to the character // array in the union. - union union_type { - // This is the only member of the union which should be used by clients: - char buffer[sizeof(SizerImpl)]; - - // This member of the union only exists to force the alignment. - struct { - typename llvm::AlignedCharArrayImpl<AlignOf<AlignerImpl>::Alignment>::type - nonce_inner_member; - } nonce_member; - }; + struct { + typename llvm::AlignedCharArrayImpl<AlignOf<AlignerImpl>::Alignment>::type + nonce_inner_member; + } nonce_member; }; } // end namespace llvm diff --git a/include/llvm/Support/COFF.h b/include/llvm/Support/COFF.h index 6c2ee08..ba8adb0 100644 --- a/include/llvm/Support/COFF.h +++ b/include/llvm/Support/COFF.h @@ -50,7 +50,7 @@ namespace COFF { }; enum MachineTypes { - MT_Invalid = -1, + MT_Invalid = 0xffff, IMAGE_FILE_MACHINE_UNKNOWN = 0x0, IMAGE_FILE_MACHINE_AM33 = 0x13, @@ -142,7 +142,7 @@ namespace COFF { /// Storage class tells where and what the symbol represents enum SymbolStorageClass { - SSC_Invalid = -1, + SSC_Invalid = 0xff, IMAGE_SYM_CLASS_END_OF_FUNCTION = -1, ///< Physical end of function IMAGE_SYM_CLASS_NULL = 0, ///< No symbol @@ -220,7 +220,7 @@ namespace COFF { }; enum SectionCharacteristics { - SC_Invalid = -1, + SC_Invalid = 0xffffffff, IMAGE_SCN_TYPE_NO_PAD = 0x00000008, IMAGE_SCN_CNT_CODE = 0x00000020, diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h index f654f32..4469ae3 100644 --- a/include/llvm/Support/Compiler.h +++ b/include/llvm/Support/Compiler.h @@ -38,6 +38,25 @@ #define llvm_move(value) (value) #endif +/// LLVM_DELETED_FUNCTION - Expands to = delete if the compiler supports it. +/// Use to mark functions as uncallable. Member functions with this should +/// be declared private so that some behaivor is kept in C++03 mode. +/// +/// class DontCopy { +/// private: +/// DontCopy(const DontCopy&) LLVM_DELETED_FUNCTION; +/// DontCopy &operator =(const DontCopy&) LLVM_DELETED_FUNCTION; +/// public: +/// ... +/// }; +#if (__has_feature(cxx_deleted_functions) \ + || defined(__GXX_EXPERIMENTAL_CXX0X__)) + // No version of MSVC currently supports this. +#define LLVM_DELETED_FUNCTION = delete +#else +#define LLVM_DELETED_FUNCTION +#endif + /// LLVM_LIBRARY_VISIBILITY - If a class marked with this attribute is linked /// into a shared library, then the class should be private to the library and /// not accessible from outside it. Can also be used to mark variables and diff --git a/include/llvm/Support/FileSystem.h b/include/llvm/Support/FileSystem.h index e0353f9..f4a9aa0 100644 --- a/include/llvm/Support/FileSystem.h +++ b/include/llvm/Support/FileSystem.h @@ -28,6 +28,7 @@ #define LLVM_SUPPORT_FILE_SYSTEM_H #include "llvm/ADT/IntrusiveRefCntPtr.h" +#include "llvm/ADT/OwningPtr.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/Twine.h" #include "llvm/Support/DataTypes.h" @@ -576,6 +577,82 @@ error_code FindLibrary(const Twine &short_name, SmallVectorImpl<char> &result); error_code GetMainExecutable(const char *argv0, void *MainAddr, SmallVectorImpl<char> &result); +/// This class represents a memory mapped file. It is based on +/// boost::iostreams::mapped_file. +class mapped_file_region { + mapped_file_region() LLVM_DELETED_FUNCTION; + mapped_file_region(mapped_file_region&) LLVM_DELETED_FUNCTION; + mapped_file_region &operator =(mapped_file_region&) LLVM_DELETED_FUNCTION; + +public: + enum mapmode { + readonly, //< May only access map via const_data as read only. + readwrite, //< May access map via data and modify it. Written to path. + priv //< May modify via data, but changes are lost on destruction. + }; + +private: + /// Platform specific mapping state. + mapmode Mode; + uint64_t Size; + void *Mapping; +#if LLVM_ON_WIN32 + int FileDescriptor; + void *FileHandle; + void *FileMappingHandle; +#endif + + error_code init(int FD, uint64_t Offset); + +public: + typedef char char_type; + +#if LLVM_USE_RVALUE_REFERENCES + mapped_file_region(mapped_file_region&&); + mapped_file_region &operator =(mapped_file_region&&); +#endif + + /// Construct a mapped_file_region at \a path starting at \a offset of length + /// \a length and with access \a mode. + /// + /// \param path Path to the file to map. If it does not exist it will be + /// created. + /// \param mode How to map the memory. + /// \param length Number of bytes to map in starting at \a offset. If the file + /// is shorter than this, it will be extended. If \a length is + /// 0, the entire file will be mapped. + /// \param offset Byte offset from the beginning of the file where the map + /// should begin. Must be a multiple of + /// mapped_file_region::alignment(). + /// \param ec This is set to errc::success if the map was constructed + /// sucessfully. Otherwise it is set to a platform dependent error. + mapped_file_region(const Twine &path, + mapmode mode, + uint64_t length, + uint64_t offset, + error_code &ec); + + /// \param fd An open file descriptor to map. mapped_file_region takes + /// ownership. It must have been opended in the correct mode. + mapped_file_region(int fd, + mapmode mode, + uint64_t length, + uint64_t offset, + error_code &ec); + + ~mapped_file_region(); + + mapmode flags() const; + uint64_t size() const; + char *data() const; + + /// Get a const view of the data. Modifying this memory has undefined + /// behaivor. + const char *const_data() const; + + /// \returns The minimum alignment offset must be. + static int alignment(); +}; /// @brief Memory maps the contents of a file /// diff --git a/include/llvm/Support/LEB128.h b/include/llvm/Support/LEB128.h index 00c7eea..410edd4 100644 --- a/include/llvm/Support/LEB128.h +++ b/include/llvm/Support/LEB128.h @@ -19,7 +19,7 @@ namespace llvm { -/// Utility function to encode a SLEB128 value. +/// Utility function to encode a SLEB128 value to an output stream. static inline void encodeSLEB128(int64_t Value, raw_ostream &OS) { bool More; do { @@ -34,7 +34,7 @@ static inline void encodeSLEB128(int64_t Value, raw_ostream &OS) { } while (More); } -/// Utility function to encode a ULEB128 value. +/// Utility function to encode a ULEB128 value to an output stream. static inline void encodeULEB128(uint64_t Value, raw_ostream &OS, unsigned Padding = 0) { do { @@ -53,6 +53,43 @@ static inline void encodeULEB128(uint64_t Value, raw_ostream &OS, } } +/// Utility function to encode a ULEB128 value to a buffer. Returns +/// the length in bytes of the encoded value. +static inline unsigned encodeULEB128(uint64_t Value, uint8_t *p, + unsigned Padding = 0) { + uint8_t *orig_p = p; + do { + uint8_t Byte = Value & 0x7f; + Value >>= 7; + if (Value != 0 || Padding != 0) + Byte |= 0x80; // Mark this byte that that more bytes will follow. + *p++ = Byte; + } while (Value != 0); + + // Pad with 0x80 and emit a null byte at the end. + if (Padding != 0) { + for (; Padding != 1; --Padding) + *p++ = '\x80'; + *p++ = '\x00'; + } + return (unsigned)(p - orig_p); +} + + +/// Utility function to decode a ULEB128 value. +static inline uint64_t decodeULEB128(const uint8_t *p, unsigned *n = 0) { + const uint8_t *orig_p = p; + uint64_t Value = 0; + unsigned Shift = 0; + do { + Value += (*p & 0x7f) << Shift; + Shift += 7; + } while (*p++ >= 128); + if (n) + *n = (unsigned)(p - orig_p); + return Value; +} + } // namespace llvm #endif // LLVM_SYSTEM_LEB128_H diff --git a/include/llvm/Support/NoFolder.h b/include/llvm/Support/NoFolder.h index 75c1a79..8e41a64 100644 --- a/include/llvm/Support/NoFolder.h +++ b/include/llvm/Support/NoFolder.h @@ -181,6 +181,12 @@ public: ArrayRef<Constant *> IdxList) const { return ConstantExpr::getGetElementPtr(C, IdxList); } + Constant *CreateGetElementPtr(Constant *C, Constant *Idx) const { + // This form of the function only exists to avoid ambiguous overload + // warnings about whether to convert Idx to ArrayRef<Constant *> or + // ArrayRef<Value *>. + return ConstantExpr::getGetElementPtr(C, Idx); + } Instruction *CreateGetElementPtr(Constant *C, ArrayRef<Value *> IdxList) const { return GetElementPtrInst::Create(C, IdxList); @@ -190,6 +196,12 @@ public: ArrayRef<Constant *> IdxList) const { return ConstantExpr::getInBoundsGetElementPtr(C, IdxList); } + Constant *CreateInBoundsGetElementPtr(Constant *C, Constant *Idx) const { + // This form of the function only exists to avoid ambiguous overload + // warnings about whether to convert Idx to ArrayRef<Constant *> or + // ArrayRef<Value *>. + return ConstantExpr::getInBoundsGetElementPtr(C, Idx); + } Instruction *CreateInBoundsGetElementPtr(Constant *C, ArrayRef<Value *> IdxList) const { return GetElementPtrInst::CreateInBounds(C, IdxList); diff --git a/include/llvm/Target/Target.td b/include/llvm/Target/Target.td index 24be2b1..1816445 100644 --- a/include/llvm/Target/Target.td +++ b/include/llvm/Target/Target.td @@ -28,6 +28,24 @@ class SubRegIndex<list<SubRegIndex> comps = []> { // ComposedOf - A list of two SubRegIndex instances, [A, B]. // This indicates that this SubRegIndex is the result of composing A and B. list<SubRegIndex> ComposedOf = comps; + + // CoveringSubRegIndices - A list of two or more sub-register indexes that + // cover this sub-register. + // + // This field should normally be left blank as TableGen can infer it. + // + // TableGen automatically detects sub-registers that straddle the registers + // in the SubRegs field of a Register definition. For example: + // + // Q0 = dsub_0 -> D0, dsub_1 -> D1 + // Q1 = dsub_0 -> D2, dsub_1 -> D3 + // D1_D2 = dsub_0 -> D1, dsub_1 -> D2 + // QQ0 = qsub_0 -> Q0, qsub_1 -> Q1 + // + // TableGen will infer that D1_D2 is a sub-register of QQ0. It will be given + // the synthetic index dsub_1_dsub_2 unless some SubRegIndex is defined with + // CoveringSubRegIndices = [dsub_1, dsub_2]. + list<SubRegIndex> CoveringSubRegIndices = []; } // RegAltNameIndex - The alternate name set to use for register operands of @@ -321,6 +339,7 @@ class Instruction { bit isCompare = 0; // Is this instruction a comparison instruction? bit isMoveImm = 0; // Is this instruction a move immediate instruction? bit isBitcast = 0; // Is this instruction a bitcast instruction? + bit isSelect = 0; // Is this instruction a select instruction? bit isBarrier = 0; // Can control flow fall through this instruction? bit isCall = 0; // Is this instruction a call instruction? bit canFoldAsLoad = 0; // Can this be folded as a simple memory operand? diff --git a/include/llvm/Target/TargetInstrInfo.h b/include/llvm/Target/TargetInstrInfo.h index a18b030..da30ab8 100644 --- a/include/llvm/Target/TargetInstrInfo.h +++ b/include/llvm/Target/TargetInstrInfo.h @@ -413,6 +413,51 @@ public: llvm_unreachable("Target didn't implement TargetInstrInfo::insertSelect!"); } + /// analyzeSelect - Analyze the given select instruction, returning true if + /// it cannot be understood. It is assumed that MI->isSelect() is true. + /// + /// When successful, return the controlling condition and the operands that + /// determine the true and false result values. + /// + /// Result = SELECT Cond, TrueOp, FalseOp + /// + /// Some targets can optimize select instructions, for example by predicating + /// the instruction defining one of the operands. Such targets should set + /// Optimizable. + /// + /// @param MI Select instruction to analyze. + /// @param Cond Condition controlling the select. + /// @param TrueOp Operand number of the value selected when Cond is true. + /// @param FalseOp Operand number of the value selected when Cond is false. + /// @param Optimizable Returned as true if MI is optimizable. + /// @returns False on success. + virtual bool analyzeSelect(const MachineInstr *MI, + SmallVectorImpl<MachineOperand> &Cond, + unsigned &TrueOp, unsigned &FalseOp, + bool &Optimizable) const { + assert(MI && MI->isSelect() && "MI must be a select instruction"); + return true; + } + + /// optimizeSelect - Given a select instruction that was understood by + /// analyzeSelect and returned Optimizable = true, attempt to optimize MI by + /// merging it with one of its operands. Returns NULL on failure. + /// + /// When successful, returns the new select instruction. The client is + /// responsible for deleting MI. + /// + /// If both sides of the select can be optimized, PreferFalse is used to pick + /// a side. + /// + /// @param MI Optimizable select instruction. + /// @param PreferFalse Try to optimize FalseOp instead of TrueOp. + /// @returns Optimized instruction or NULL. + virtual MachineInstr *optimizeSelect(MachineInstr *MI, + bool PreferFalse = false) const { + // This function must be implemented if Optimizable is ever set. + llvm_unreachable("Target must implement TargetInstrInfo::optimizeSelect!"); + } + /// copyPhysReg - Emit instructions to copy a pair of physical registers. virtual void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, DebugLoc DL, |
