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LLVM
3.7.0
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Information about the stack frame layout on the AMDGPU targets. More...
#include <AMDGPUFrameLowering.h>
Public Member Functions | |
| AMDGPUFrameLowering (StackDirection D, unsigned StackAl, int LAO, unsigned TransAl=1) | |
| virtual | ~AMDGPUFrameLowering () |
| unsigned | getStackWidth (const MachineFunction &MF) const |
| int | getFrameIndexOffset (const MachineFunction &MF, int FI) const override |
| const SpillSlot * | getCalleeSavedSpillSlots (unsigned &NumEntries) const override |
| getCalleeSavedSpillSlots - This method returns a pointer to an array of pairs, that contains an entry for each callee saved register that must be spilled to a particular stack location if it is spilled. More... | |
| void | emitPrologue (MachineFunction &MF, MachineBasicBlock &MBB) const override |
| emitProlog/emitEpilog - These methods insert prolog and epilog code into the function. More... | |
| void | emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const override |
| bool | hasFP (const MachineFunction &MF) const override |
| hasFP - Return true if the specified function should have a dedicated frame pointer register. More... | |
Public Member Functions inherited from llvm::TargetFrameLowering | |
| TargetFrameLowering (StackDirection D, unsigned StackAl, int LAO, unsigned TransAl=1, bool StackReal=true) | |
| virtual | ~TargetFrameLowering () |
| StackDirection | getStackGrowthDirection () const |
| getStackGrowthDirection - Return the direction the stack grows More... | |
| unsigned | getStackAlignment () const |
| getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned on entry to a function. More... | |
| unsigned | getTransientStackAlignment () const |
| getTransientStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned at all times, even between calls. More... | |
| bool | isStackRealignable () const |
| isStackRealignable - This method returns whether the stack can be realigned. More... | |
| int | getOffsetOfLocalArea () const |
| getOffsetOfLocalArea - This method returns the offset of the local area from the stack pointer on entrance to a function. More... | |
| virtual bool | isFPCloseToIncomingSP () const |
| isFPCloseToIncomingSP - Return true if the frame pointer is close to the incoming stack pointer, false if it is close to the post-prologue stack pointer. More... | |
| virtual bool | assignCalleeSavedSpillSlots (MachineFunction &MF, const TargetRegisterInfo *TRI, std::vector< CalleeSavedInfo > &CSI) const |
| assignCalleeSavedSpillSlots - Allows target to override spill slot assignment logic. More... | |
| virtual bool | targetHandlesStackFrameRounding () const |
| targetHandlesStackFrameRounding - Returns true if the target is responsible for rounding up the stack frame (probably at emitPrologue time). More... | |
| virtual void | adjustForSegmentedStacks (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const |
| Adjust the prologue to have the function use segmented stacks. More... | |
| virtual void | adjustForHiPEPrologue (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const |
| Adjust the prologue to add Erlang Run-Time System (ERTS) specific code in the assembly prologue to explicitly handle the stack. More... | |
| virtual void | adjustForFrameAllocatePrologue (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const |
| Adjust the prologue to add an allocation at a fixed offset from the frame pointer. More... | |
| virtual bool | spillCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const |
| spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of store instructions via storeRegToStackSlot(). More... | |
| virtual bool | restoreCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const |
| restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of load instructions via loadRegToStackSlot(). More... | |
| virtual bool | noFramePointerElim (const MachineFunction &MF) const |
| Return true if the target needs to disable frame pointer elimination. More... | |
| virtual bool | hasReservedCallFrame (const MachineFunction &MF) const |
| hasReservedCallFrame - Under normal circumstances, when a frame pointer is not required, we reserve argument space for call sites in the function immediately on entry to the current function. More... | |
| virtual bool | canSimplifyCallFramePseudos (const MachineFunction &MF) const |
| canSimplifyCallFramePseudos - When possible, it's best to simplify the call frame pseudo ops before doing frame index elimination. More... | |
| virtual bool | needsFrameIndexResolution (const MachineFunction &MF) const |
| virtual int | getFrameIndexReference (const MachineFunction &MF, int FI, unsigned &FrameReg) const |
| getFrameIndexReference - This method should return the base register and offset used to reference a frame index location. More... | |
| virtual int | getFrameIndexReferenceFromSP (const MachineFunction &MF, int FI, unsigned &FrameReg) const |
| Same as above, except that the 'base register' will always be RSP, not RBP on x86. More... | |
| virtual void | determineCalleeSaves (MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS=nullptr) const |
| This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() should actually get saved. More... | |
| virtual void | processFunctionBeforeFrameFinalized (MachineFunction &MF, RegScavenger *RS=nullptr) const |
| processFunctionBeforeFrameFinalized - This method is called immediately before the specified function's frame layout (MF.getFrameInfo()) is finalized. More... | |
| virtual void | eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const |
| eliminateCallFramePseudoInstr - This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy pseudo instructions (but only if the Target is using them). More... | |
| virtual bool | canUseAsPrologue (const MachineBasicBlock &MBB) const |
Check whether or not the given MBB can be used as a prologue for the target. More... | |
| virtual bool | canUseAsEpilogue (const MachineBasicBlock &MBB) const |
Check whether or not the given MBB can be used as a epilogue for the target. More... | |
Additional Inherited Members | |
Public Types inherited from llvm::TargetFrameLowering | |
| enum | StackDirection { StackGrowsUp, StackGrowsDown } |
Information about the stack frame layout on the AMDGPU targets.
It holds the direction of the stack growth, the known stack alignment on entry to each function, and the offset to the locals area. See TargetFrameInfo for more comments.
Definition at line 28 of file AMDGPUFrameLowering.h.
| AMDGPUFrameLowering::AMDGPUFrameLowering | ( | StackDirection | D, |
| unsigned | StackAl, | ||
| int | LAO, | ||
| unsigned | TransAl = 1 |
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| ) |
Definition at line 21 of file AMDGPUFrameLowering.cpp.
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virtual |
Definition at line 25 of file AMDGPUFrameLowering.cpp.
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overridevirtual |
Implements llvm::TargetFrameLowering.
Definition at line 105 of file AMDGPUFrameLowering.cpp.
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overridevirtual |
emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
Implements llvm::TargetFrameLowering.
Definition at line 102 of file AMDGPUFrameLowering.cpp.
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overridevirtual |
getCalleeSavedSpillSlots - This method returns a pointer to an array of pairs, that contains an entry for each callee saved register that must be spilled to a particular stack location if it is spilled.
Each entry in this array contains a <register,offset> pair, indicating the fixed offset from the incoming stack pointer that each register should be spilled at. If a register is not listed here, the code generator is allowed to spill it anywhere it chooses.
Reimplemented from llvm::TargetFrameLowering.
Definition at line 98 of file AMDGPUFrameLowering.cpp.
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overridevirtual |
FI. Reimplemented from llvm::TargetFrameLowering.
Definition at line 74 of file AMDGPUFrameLowering.cpp.
References llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getNumObjects(), llvm::MachineFrameInfo::getObjectAlignment(), llvm::MachineFrameInfo::getObjectIndexBegin(), llvm::MachineFrameInfo::getObjectSize(), getStackWidth(), and llvm::RoundUpToAlignment().
| unsigned AMDGPUFrameLowering::getStackWidth | ( | const MachineFunction & | MF | ) | const |
Definition at line 27 of file AMDGPUFrameLowering.cpp.
Referenced by getFrameIndexOffset(), and llvm::R600InstrInfo::reserveIndirectRegisters().
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overridevirtual |
hasFP - Return true if the specified function should have a dedicated frame pointer register.
For most targets this is true only if the function has variable sized allocas or if frame pointer elimination is disabled.
Implements llvm::TargetFrameLowering.
Definition at line 110 of file AMDGPUFrameLowering.cpp.
1.8.6