diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86FrameLowering.h')
| -rw-r--r-- | llvm/lib/Target/X86/X86FrameLowering.h | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/llvm/lib/Target/X86/X86FrameLowering.h b/llvm/lib/Target/X86/X86FrameLowering.h index 6975d250296..db32be12924 100644 --- a/llvm/lib/Target/X86/X86FrameLowering.h +++ b/llvm/lib/Target/X86/X86FrameLowering.h @@ -47,11 +47,17 @@ public: unsigned StackPtr; - /// Emit a call to the target's stack probe function. This is required for all + /// Emit target stack probe code. 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. - void emitStackProbeCall(MachineFunction &MF, MachineBasicBlock &MBB, - MachineBasicBlock::iterator MBBI, DebugLoc DL) const; + /// the number of bytes to probe in RAX/EAX. Returns instruction just + /// after the expansion. + MachineInstr *emitStackProbe(MachineFunction &MF, MachineBasicBlock &MBB, + MachineBasicBlock::iterator MBBI, DebugLoc DL, + bool InProlog) const; + + /// Replace a StackProbe inline-stub with the actual probe code inline. + void inlineStackProbe(MachineFunction &MF, + MachineBasicBlock &PrologMBB) const override; void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, @@ -125,6 +131,15 @@ public: /// \p MBB will be correctly handled by the target. bool canUseAsEpilogue(const MachineBasicBlock &MBB) const override; + /// 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; + /// Wraps up getting a CFI index and building a MachineInstr for it. void BuildCFI(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, DebugLoc DL, MCCFIInstruction CFIInst) const; @@ -139,6 +154,23 @@ public: private: uint64_t calculateMaxStackAlign(const MachineFunction &MF) const; + /// Emit target stack probe as a call to a helper function + MachineInstr *emitStackProbeCall(MachineFunction &MF, MachineBasicBlock &MBB, + MachineBasicBlock::iterator MBBI, + DebugLoc DL, bool InProlog) const; + + /// Emit target stack probe as an inline sequence. + MachineInstr *emitStackProbeInline(MachineFunction &MF, + MachineBasicBlock &MBB, + MachineBasicBlock::iterator MBBI, + DebugLoc DL, bool InProlog) const; + + /// Emit a stub to later inline the target stack probe. + MachineInstr *emitStackProbeInlineStub(MachineFunction &MF, + MachineBasicBlock &MBB, + MachineBasicBlock::iterator MBBI, + DebugLoc DL, bool InProlog) const; + /// Aligns the stack pointer by ANDing it with -MaxAlign. void BuildStackAlignAND(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, DebugLoc DL, |
