X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FMachineFunction.h;h=ef77b6069fcc2db00d2a6f6e35ee0affa09fc491;hp=595872ad2d742b84807c415a4adb6ec578a14e69;hb=6035518e3bd06cef0515af5a319fbe2cea7df6d4;hpb=174e597d466547d34cf8fcd2a95976e0cf5ebbac diff --git a/include/llvm/CodeGen/MachineFunction.h b/include/llvm/CodeGen/MachineFunction.h index 595872ad2d7..ef77b6069fc 100644 --- a/include/llvm/CodeGen/MachineFunction.h +++ b/include/llvm/CodeGen/MachineFunction.h @@ -18,16 +18,19 @@ #ifndef LLVM_CODEGEN_MACHINEFUNCTION_H #define LLVM_CODEGEN_MACHINEFUNCTION_H -#include "llvm/CodeGen/MachineBasicBlock.h" #include "llvm/ADT/ilist.h" -#include "llvm/Support/DebugLoc.h" +#include "llvm/CodeGen/MachineBasicBlock.h" +#include "llvm/IR/DebugLoc.h" +#include "llvm/IR/Metadata.h" #include "llvm/Support/Allocator.h" +#include "llvm/Support/ArrayRecycler.h" #include "llvm/Support/Recycler.h" namespace llvm { class Value; class Function; +class GCModuleInfo; class MachineRegisterInfo; class MachineFrameInfo; class MachineConstantPool; @@ -36,7 +39,9 @@ class MachineModuleInfo; class MCContext; class Pass; class TargetMachine; +class TargetSubtargetInfo; class TargetRegisterClass; +struct MachinePointerInfo; template <> struct ilist_traits @@ -72,8 +77,10 @@ struct MachineFunctionInfo { class MachineFunction { const Function *Fn; const TargetMachine &Target; + const TargetSubtargetInfo *STI; MCContext &Ctx; MachineModuleInfo &MMI; + GCModuleInfo *GMI; // RegInfo - Information about each register in use in the function. MachineRegisterInfo *RegInfo; @@ -102,6 +109,9 @@ class MachineFunction { // Allocation management for instructions in function. Recycler InstructionRecycler; + // Allocation management for operand arrays on instructions. + ArrayRecycler OperandRecycler; + // Allocation management for basic blocks in function. Recycler BasicBlockRecycler; @@ -114,31 +124,52 @@ class MachineFunction { /// unsigned FunctionNumber; - /// The alignment of the function. + /// Alignment - The alignment of the function. unsigned Alignment; - MachineFunction(const MachineFunction &); // DO NOT IMPLEMENT - void operator=(const MachineFunction&); // DO NOT IMPLEMENT + /// ExposesReturnsTwice - True if the function calls setjmp or related + /// functions with attribute "returns twice", but doesn't have + /// the attribute itself. + /// This is used to limit optimizations which cannot reason + /// about the control flow of such functions. + bool ExposesReturnsTwice; + + /// True if the function includes any inline assembly. + bool HasInlineAsm; + + MachineFunction(const MachineFunction &) LLVM_DELETED_FUNCTION; + void operator=(const MachineFunction&) LLVM_DELETED_FUNCTION; public: MachineFunction(const Function *Fn, const TargetMachine &TM, - unsigned FunctionNum, MachineModuleInfo &MMI); + unsigned FunctionNum, MachineModuleInfo &MMI, + GCModuleInfo* GMI); ~MachineFunction(); MachineModuleInfo &getMMI() const { return MMI; } + GCModuleInfo *getGMI() const { return GMI; } MCContext &getContext() const { return Ctx; } - + /// getFunction - Return the LLVM function that this machine code represents /// const Function *getFunction() const { return Fn; } + /// getName - Return the name of the corresponding LLVM function. + /// + StringRef getName() const; + /// getFunctionNumber - Return a unique ID for the current function. /// unsigned getFunctionNumber() const { return FunctionNumber; } - + /// getTarget - Return the target machine this machine code is compiled with /// const TargetMachine &getTarget() const { return Target; } + /// getSubtarget - Return the subtarget for which this machine code is being + /// compiled. + const TargetSubtargetInfo &getSubtarget() const { return *STI; } + void setSubtarget(TargetSubtargetInfo *ST) { STI = ST; } + /// getRegInfo - Return information about the registers currently in use. /// MachineRegisterInfo &getRegInfo() { return *RegInfo; } @@ -177,23 +208,41 @@ public: /// void setAlignment(unsigned A) { Alignment = A; } - /// EnsureAlignment - Make sure the function is at least 'A' bits aligned. - void EnsureAlignment(unsigned A) { + /// ensureAlignment - Make sure the function is at least 1 << A bytes aligned. + void ensureAlignment(unsigned A) { if (Alignment < A) Alignment = A; } - + + /// exposesReturnsTwice - Returns true if the function calls setjmp or + /// any other similar functions with attribute "returns twice" without + /// having the attribute itself. + bool exposesReturnsTwice() const { + return ExposesReturnsTwice; + } + + /// setCallsSetJmp - Set a flag that indicates if there's a call to + /// a "returns twice" function. + void setExposesReturnsTwice(bool B) { + ExposesReturnsTwice = B; + } + + /// Returns true if the function contains any inline assembly. + bool hasInlineAsm() const { + return HasInlineAsm; + } + + /// Set a flag that indicates that the function contains inline assembly. + void setHasInlineAsm(bool B) { + HasInlineAsm = B; + } + /// getInfo - Keep track of various per-function pieces of information for /// backends that would like to do so. /// template Ty *getInfo() { - if (!MFInfo) { - // This should be just `new (Allocator.Allocate()) Ty(*this)', but - // that apparently breaks GCC 3.3. - Ty *Loc = static_cast(Allocator.Allocate(sizeof(Ty), - AlignOf::Alignment)); - MFInfo = new (Loc) Ty(*this); - } + if (!MFInfo) + MFInfo = new (Allocator.Allocate()) Ty(*this); return static_cast(MFInfo); } @@ -213,6 +262,9 @@ public: return MBBNumbering[N]; } + /// Should we be emitting segmented stack stuff for the function + bool shouldSplitStack(); + /// getNumBlockIDs - Return the number of MBB ID's allocated. /// unsigned getNumBlockIDs() const { return (unsigned)MBBNumbering.size(); } @@ -222,12 +274,12 @@ public: /// dense, and match the ordering of the blocks within the function. If a /// specific MachineBasicBlock is specified, only that block and those after /// it are renumbered. - void RenumberBlocks(MachineBasicBlock *MBBFrom = 0); + void RenumberBlocks(MachineBasicBlock *MBBFrom = nullptr); /// print - Print out the MachineFunction in a format suitable for debugging /// to the specified stream. /// - void print(raw_ostream &OS) const; + void print(raw_ostream &OS, SlotIndexes* = nullptr) const; /// viewCFG - This function is meant for use from the debugger. You can just /// say 'call F->viewCFG()' and a ghostview window should pop up from the @@ -250,7 +302,7 @@ public: /// verify - Run the current MachineFunction through the machine code /// verifier, useful for debugger use. - void verify(Pass *p=NULL, bool allowDoubleDefs=false) const; + void verify(Pass *p = nullptr, const char *Banner = nullptr) const; // Provide accessors for the MachineBasicBlock list... typedef BasicBlockListType::iterator iterator; @@ -305,8 +357,8 @@ public: // Internal functions used to automatically number MachineBasicBlocks // - /// getNextMBBNumber - Returns the next unique number to be assigned - /// to a MachineBasicBlock in this MachineFunction. + /// \brief Adds the MBB to the internal numbering. Returns the unique number + /// assigned to the MBB. /// unsigned addToMBBNumbering(MachineBasicBlock *MBB) { MBBNumbering.push_back(MBB); @@ -318,13 +370,13 @@ public: /// implementation. void removeFromMBBNumbering(unsigned N) { assert(N < MBBNumbering.size() && "Illegal basic block #"); - MBBNumbering[N] = 0; + MBBNumbering[N] = nullptr; } /// CreateMachineInstr - Allocate a new MachineInstr. Use this instead /// of `new MachineInstr'. /// - MachineInstr *CreateMachineInstr(const TargetInstrDesc &TID, + MachineInstr *CreateMachineInstr(const MCInstrDesc &MCID, DebugLoc DL, bool NoImp = false); @@ -343,7 +395,7 @@ public: /// CreateMachineBasicBlock - Allocate a new MachineBasicBlock. Use this /// instead of `new MachineBasicBlock'. /// - MachineBasicBlock *CreateMachineBasicBlock(const BasicBlock *bb = 0); + MachineBasicBlock *CreateMachineBasicBlock(const BasicBlock *bb = nullptr); /// DeleteMachineBasicBlock - Delete the given MachineBasicBlock. /// @@ -352,10 +404,12 @@ public: /// getMachineMemOperand - Allocate a new MachineMemOperand. /// MachineMemOperands are owned by the MachineFunction and need not be /// explicitly deallocated. - MachineMemOperand *getMachineMemOperand(const Value *v, unsigned f, - int64_t o, uint64_t s, - unsigned base_alignment); - + MachineMemOperand *getMachineMemOperand(MachinePointerInfo PtrInfo, + unsigned f, uint64_t s, + unsigned base_alignment, + const AAMDNodes &AAInfo = AAMDNodes(), + const MDNode *Ranges = nullptr); + /// getMachineMemOperand - Allocate a new MachineMemOperand by copying /// an existing one, adjusting by an offset and using the given size. /// MachineMemOperands are owned by the MachineFunction and need not be @@ -363,6 +417,30 @@ public: MachineMemOperand *getMachineMemOperand(const MachineMemOperand *MMO, int64_t Offset, uint64_t Size); + typedef ArrayRecycler::Capacity OperandCapacity; + + /// Allocate an array of MachineOperands. This is only intended for use by + /// internal MachineInstr functions. + MachineOperand *allocateOperandArray(OperandCapacity Cap) { + return OperandRecycler.allocate(Cap, Allocator); + } + + /// Dellocate an array of MachineOperands and recycle the memory. This is + /// only intended for use by internal MachineInstr functions. + /// Cap must be the same capacity that was used to allocate the array. + void deallocateOperandArray(OperandCapacity Cap, MachineOperand *Array) { + OperandRecycler.deallocate(Cap, Array); + } + + /// \brief Allocate and initialize a register mask with @p NumRegister bits. + uint32_t *allocateRegisterMask(unsigned NumRegister) { + unsigned Size = (NumRegister + 31) / 32; + uint32_t *Mask = Allocator.Allocate(Size); + for (unsigned i = 0; i != Size; ++i) + Mask[i] = 0; + return Mask; + } + /// allocateMemRefsArray - Allocate an array to hold MachineMemOperand /// pointers. This array is owned by the MachineFunction. MachineInstr::mmo_iterator allocateMemRefsArray(unsigned long Num); @@ -390,6 +468,10 @@ public: /// normal 'L' label is returned. MCSymbol *getJTISymbol(unsigned JTI, MCContext &Ctx, bool isLinkerPrivate = false) const; + + /// getPICBaseSymbol - Return a function-local symbol to represent the PIC + /// base. + MCSymbol *getPICBaseSymbol() const; }; //===--------------------------------------------------------------------===// @@ -411,6 +493,7 @@ template <> struct GraphTraits : typedef MachineFunction::iterator nodes_iterator; static nodes_iterator nodes_begin(MachineFunction *F) { return F->begin(); } static nodes_iterator nodes_end (MachineFunction *F) { return F->end(); } + static unsigned size (MachineFunction *F) { return F->size(); } }; template <> struct GraphTraits : public GraphTraits { @@ -426,6 +509,9 @@ template <> struct GraphTraits : static nodes_iterator nodes_end (const MachineFunction *F) { return F->end(); } + static unsigned size (const MachineFunction *F) { + return F->size(); + } };