X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FMachineFrameInfo.h;h=93d77287d7ca621beab9832d44775c59a6cedc22;hb=d1abec365aa89a8497d9b615ccb4b21c72da9447;hp=7d75c2d5c27d5f86e23934c81ce9532f025a4a46;hpb=7e75cabba0a55972c8353b449f20159eb38abeb9;p=oota-llvm.git diff --git a/include/llvm/CodeGen/MachineFrameInfo.h b/include/llvm/CodeGen/MachineFrameInfo.h index 7d75c2d5c27..93d77287d7c 100644 --- a/include/llvm/CodeGen/MachineFrameInfo.h +++ b/include/llvm/CodeGen/MachineFrameInfo.h @@ -15,23 +15,24 @@ #define LLVM_CODEGEN_MACHINEFRAMEINFO_H #include "llvm/ADT/SmallVector.h" -//#include "llvm/ADT/IndexedMap.h" -#include "llvm/System/DataTypes.h" +#include "llvm/Support/DataTypes.h" #include #include namespace llvm { class raw_ostream; -class TargetData; +class DataLayout; class TargetRegisterClass; class Type; class MachineFunction; class MachineBasicBlock; -class TargetFrameInfo; +class TargetFrameLowering; class BitVector; +class Value; +class AllocaInst; /// The CalleeSavedInfo class tracks the information need to locate where a -/// callee saved register in the current frame. +/// callee saved register is in the current frame. class CalleeSavedInfo { unsigned Reg; int FrameIdx; @@ -104,14 +105,18 @@ class MachineFrameInfo { // protector. bool MayNeedSP; + /// Alloca - If this stack object is originated from an Alloca instruction + /// this value saves the original IR allocation. Can be NULL. + const AllocaInst *Alloca; + // PreAllocated - If true, the object was mapped into the local frame // block and doesn't need additional handling for allocation beyond that. bool PreAllocated; StackObject(uint64_t Sz, unsigned Al, int64_t SP, bool IM, - bool isSS, bool NSP) + bool isSS, bool NSP, const AllocaInst *Val) : SPOffset(SP), Size(Sz), Alignment(Al), isImmutable(IM), - isSpillSlot(isSS), MayNeedSP(NSP), PreAllocated(false) {} + isSpillSlot(isSS), MayNeedSP(NSP), Alloca(Val), PreAllocated(false) {} }; /// Objects - The list of stack objects allocated... @@ -175,6 +180,10 @@ class MachineFrameInfo { /// StackProtectorIdx - The frame index for the stack protector. int StackProtectorIdx; + /// FunctionContextIdx - The frame index for the function context. Used for + /// SjLj exceptions. + int FunctionContextIdx; + /// MaxCallFrameSize - This contains the size of the largest call frame if the /// target uses frame setup/destroy pseudo instructions (as defined in the /// TargetFrameInfo class). This information is important for frame pointer @@ -192,13 +201,9 @@ class MachineFrameInfo { /// CSIValid - Has CSInfo been set yet? bool CSIValid; - /// SpillObjects - A vector indicating which frame indices refer to - /// spill slots. - SmallVector SpillObjects; - - /// TargetFrameInfo - Target information about frame layout. + /// TargetFrameLowering - Target information about frame layout. /// - const TargetFrameInfo &TFI; + const TargetFrameLowering &TFI; /// LocalFrameObjects - References to frame indices which are mapped /// into the local frame allocation block. @@ -207,11 +212,6 @@ class MachineFrameInfo { /// LocalFrameSize - Size of the pre-allocated local frame block. int64_t LocalFrameSize; - /// LocalFrameBaseOffset - The base offset from the stack pointer at - /// function entry of the local frame blob. Set by PEI for use by - /// target in eliminateFrameIndex(). - int64_t LocalFrameBaseOffset; - /// Required alignment of the local object blob, which is the strictest /// alignment of any object in it. unsigned LocalFrameMaxAlign; @@ -221,8 +221,11 @@ class MachineFrameInfo { /// just allocate them normally. bool UseLocalStackAllocationBlock; + /// Whether the "realign-stack" option is on. + bool RealignOption; public: - explicit MachineFrameInfo(const TargetFrameInfo &tfi) : TFI(tfi) { + explicit MachineFrameInfo(const TargetFrameLowering &tfi, bool RealignOpt) + : TFI(tfi), RealignOption(RealignOpt) { StackSize = NumFixedObjects = OffsetAdjustment = MaxAlignment = 0; HasVarSizedObjects = false; FrameAddressTaken = false; @@ -230,10 +233,10 @@ public: AdjustsStack = false; HasCalls = false; StackProtectorIdx = -1; + FunctionContextIdx = -1; MaxCallFrameSize = 0; CSIValid = false; LocalFrameSize = 0; - LocalFrameBaseOffset = 0; LocalFrameMaxAlign = 0; UseLocalStackAllocationBlock = false; } @@ -255,6 +258,11 @@ public: int getStackProtectorIndex() const { return StackProtectorIdx; } void setStackProtectorIndex(int I) { StackProtectorIdx = I; } + /// getFunctionContextIndex/setFunctionContextIndex - Return the index for the + /// function context object. This object is used for SjLj exceptions. + int getFunctionContextIndex() const { return FunctionContextIdx; } + void setFunctionContextIndex(int I) { FunctionContextIdx = I; } + /// isFrameAddressTaken - This method may be called any time after instruction /// selection is complete to determine if there is a call to /// \@llvm.frameaddress in this function. @@ -299,14 +307,6 @@ public: /// the local object block. int64_t getLocalFrameObjectCount() { return LocalFrameObjects.size(); } - /// setLocalFrameBaseOffset - Set the base SP offset of the local frame - /// blob. - void setLocalFrameBaseOffset(int64_t o) { LocalFrameBaseOffset = o; } - - /// getLocalFrameBaseOffset - Get the base SP offset of the local frame - /// blob. - int64_t getLocalFrameBaseOffset() const { return LocalFrameBaseOffset; } - /// setLocalFrameSize - Set the size of the local object blob. void setLocalFrameSize(int64_t sz) { LocalFrameSize = sz; } @@ -319,7 +319,7 @@ public: /// getLocalFrameMaxAlign - Return the required alignment of the local /// object blob. - unsigned getLocalFrameMaxAlign() { return LocalFrameMaxAlign; } + unsigned getLocalFrameMaxAlign() const { return LocalFrameMaxAlign; } /// getUseLocalStackAllocationBlock - Get whether the local allocation blob /// should be allocated together or let PEI allocate the locals in it @@ -368,7 +368,15 @@ public: assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() && "Invalid Object Idx!"); Objects[ObjectIdx+NumFixedObjects].Alignment = Align; - MaxAlignment = std::max(MaxAlignment, Align); + ensureMaxAlignment(Align); + } + + /// getObjectAllocation - Return the underlying Alloca of the specified + /// stack object if it exists. Returns 0 if none exists. + const AllocaInst* getObjectAllocation(int ObjectIdx) const { + assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() && + "Invalid Object Idx!"); + return Objects[ObjectIdx+NumFixedObjects].Alloca; } /// NeedsStackProtector - Returns true if the object may need stack @@ -425,9 +433,9 @@ public: /// unsigned getMaxAlignment() const { return MaxAlignment; } - /// setMaxAlignment - Set the preferred alignment. - /// - void setMaxAlignment(unsigned Align) { MaxAlignment = Align; } + /// ensureMaxAlignment - Make sure the function is at least Align bytes + /// aligned. + void ensureMaxAlignment(unsigned Align); /// AdjustsStack - Return true if this function adjusts the stack -- e.g., /// when calling another function. This is only valid during and after @@ -474,7 +482,7 @@ public: bool isSpillSlotObjectIndex(int ObjectIdx) const { assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() && "Invalid Object Idx!"); - return Objects[ObjectIdx+NumFixedObjects].isSpillSlot;; + return Objects[ObjectIdx+NumFixedObjects].isSpillSlot; } /// isDeadObjectIndex - Returns true if the specified index corresponds to @@ -489,25 +497,13 @@ public: /// a nonnegative identifier to represent it. /// int CreateStackObject(uint64_t Size, unsigned Alignment, bool isSS, - bool MayNeedSP = false) { - assert(Size != 0 && "Cannot allocate zero size stack objects!"); - Objects.push_back(StackObject(Size, Alignment, 0, false, isSS, MayNeedSP)); - int Index = (int)Objects.size() - NumFixedObjects - 1; - assert(Index >= 0 && "Bad frame index!"); - MaxAlignment = std::max(MaxAlignment, Alignment); - return Index; - } + bool MayNeedSP = false, const AllocaInst *Alloca = 0); /// CreateSpillStackObject - Create a new statically sized stack object that /// represents a spill slot, returning a nonnegative identifier to represent /// it. /// - int CreateSpillStackObject(uint64_t Size, unsigned Alignment) { - CreateStackObject(Size, Alignment, true, false); - int Index = (int)Objects.size() - NumFixedObjects - 1; - MaxAlignment = std::max(MaxAlignment, Alignment); - return Index; - } + int CreateSpillStackObject(uint64_t Size, unsigned Alignment); /// RemoveStackObject - Remove or mark dead a statically sized stack object. /// @@ -521,12 +517,7 @@ public: /// variable sized object is created, whether or not the index returned is /// actually used. /// - int CreateVariableSizedObject(unsigned Alignment) { - HasVarSizedObjects = true; - Objects.push_back(StackObject(0, Alignment, 0, false, false, true)); - MaxAlignment = std::max(MaxAlignment, Alignment); - return (int)Objects.size()-NumFixedObjects-1; - } + int CreateVariableSizedObject(unsigned Alignment); /// getCalleeSavedInfo - Returns a reference to call saved info vector for the /// current function.