diff options
Diffstat (limited to 'lib/Target/X86/X86FrameLowering.h')
| -rw-r--r-- | lib/Target/X86/X86FrameLowering.h | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/lib/Target/X86/X86FrameLowering.h b/lib/Target/X86/X86FrameLowering.h index 7740c3a..542bbbc 100644 --- a/lib/Target/X86/X86FrameLowering.h +++ b/lib/Target/X86/X86FrameLowering.h @@ -18,18 +18,16 @@ namespace llvm { -class MCSymbol; -class X86TargetMachine; -class X86Subtarget; - class X86FrameLowering : public TargetFrameLowering { public: explicit X86FrameLowering(StackDirection D, unsigned StackAl, int LAO) : TargetFrameLowering(StackGrowsDown, StackAl, LAO) {} - static void getStackProbeFunction(const X86Subtarget &STI, - unsigned &CallOp, - const char *&Symbol); + /// Emit a call to the target's stack probe function. This is required for all + /// large stack allocations on Windows. The caller is required to materialize + /// the number of bytes to probe in RAX/EAX. + static void emitStackProbeCall(MachineFunction &MF, MachineBasicBlock &MBB, + MachineBasicBlock::iterator MBBI, DebugLoc DL); void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, @@ -64,14 +62,30 @@ public: bool hasFP(const MachineFunction &MF) const override; bool hasReservedCallFrame(const MachineFunction &MF) const override; + bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override; + bool needsFrameIndexResolution(const MachineFunction &MF) const override; int getFrameIndexOffset(const MachineFunction &MF, int FI) const override; int getFrameIndexReference(const MachineFunction &MF, int FI, unsigned &FrameReg) const override; + int getFrameIndexOffsetFromSP(const MachineFunction &MF, int FI) const; + int getFrameIndexReferenceFromSP(const MachineFunction &MF, int FI, + unsigned &FrameReg) const override; + void eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const override; + +private: + /// convertArgMovsToPushes - This method tries to convert a call sequence + /// that uses sub and mov instructions to put the argument onto the stack + /// into a series of pushes. + /// Returns true if the transformation succeeded, false if not. + bool convertArgMovsToPushes(MachineFunction &MF, + MachineBasicBlock &MBB, + MachineBasicBlock::iterator I, + uint64_t Amount) const; }; } // End llvm namespace |