1 //===--------------------- AMDGPUFrameLowering.h ----------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 /// \file 11 /// \brief Interface to describe a layout of a stack frame on an AMDGPU target. 12 // 13 //===----------------------------------------------------------------------===// 14 #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H 15 #define LLVM_LIB_TARGET_AMDGPU_AMDGPUFRAMELOWERING_H 16 17 #include "llvm/Target/TargetFrameLowering.h" 18 19 namespace llvm { 20 21 /// \brief Information about the stack frame layout on the AMDGPU targets. 22 /// 23 /// It holds the direction of the stack growth, the known stack alignment on 24 /// entry to each function, and the offset to the locals area. 25 /// See TargetFrameInfo for more comments. 26 class AMDGPUFrameLowering : public TargetFrameLowering { 27 public: 28 AMDGPUFrameLowering(StackDirection D, unsigned StackAl, int LAO, 29 unsigned TransAl = 1); 30 virtual ~AMDGPUFrameLowering(); 31 32 /// \returns The number of 32-bit sub-registers that are used when storing 33 /// values to the stack. 34 unsigned getStackWidth(const MachineFunction &MF) const; 35 36 int getFrameIndexReference(const MachineFunction &MF, int FI, 37 unsigned &FrameReg) const override; 38 hasFP(const MachineFunction & MF)39 bool hasFP(const MachineFunction &MF) const override { 40 return false; 41 } 42 }; 43 } // namespace llvm 44 #endif 45