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ab4fb8ba2f
Partially implement callee-side for arguments and return values. byval doesn't work properly, and most likely sret or other on-stack return values most as well. llvm-svn: 303308
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
//===-- AMDGPURegisterInfo.cpp - AMDGPU Register Information -------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// \brief Parent TargetRegisterInfo class common to all hw codegen targets.
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//
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//===----------------------------------------------------------------------===//
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#include "AMDGPURegisterInfo.h"
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#include "AMDGPUTargetMachine.h"
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#include "SIRegisterInfo.h"
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using namespace llvm;
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AMDGPURegisterInfo::AMDGPURegisterInfo() : AMDGPUGenRegisterInfo(0) {}
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//===----------------------------------------------------------------------===//
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// Function handling callbacks - Functions are a seldom used feature of GPUS, so
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// they are not supported at this time.
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//===----------------------------------------------------------------------===//
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unsigned AMDGPURegisterInfo::getSubRegFromChannel(unsigned Channel) const {
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static const unsigned SubRegs[] = {
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AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3, AMDGPU::sub4,
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AMDGPU::sub5, AMDGPU::sub6, AMDGPU::sub7, AMDGPU::sub8, AMDGPU::sub9,
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AMDGPU::sub10, AMDGPU::sub11, AMDGPU::sub12, AMDGPU::sub13, AMDGPU::sub14,
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AMDGPU::sub15
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};
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assert(Channel < array_lengthof(SubRegs));
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return SubRegs[Channel];
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}
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#define GET_REGINFO_TARGET_DESC
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#include "AMDGPUGenRegisterInfo.inc"
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// Forced to be here by one .inc
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const MCPhysReg *SIRegisterInfo::getCalleeSavedRegs(
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const MachineFunction *MF) const {
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CallingConv::ID CC = MF->getFunction()->getCallingConv();
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switch (CC) {
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case CallingConv::C:
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case CallingConv::Fast:
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return CSR_AMDGPU_HighRegs_SaveList;
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default: {
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// Dummy to not crash RegisterClassInfo.
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static const MCPhysReg NoCalleeSavedReg = AMDGPU::NoRegister;
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return &NoCalleeSavedReg;
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}
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}
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}
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const uint32_t *SIRegisterInfo::getCallPreservedMask(const MachineFunction &MF,
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CallingConv::ID CC) const {
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switch (CC) {
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case CallingConv::C:
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case CallingConv::Fast:
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return CSR_AMDGPU_HighRegs_RegMask;
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default:
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return nullptr;
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}
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}
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unsigned SIRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
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return AMDGPU::NoRegister;
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}
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