46 bool WebAssemblyFrameLowering::hasBP(const MachineFunction &MF) const {  in hasBP()
48       MF.getSubtarget<WebAssemblySubtarget>().getRegisterInfo();  in hasBP()
49   return RegInfo->needsStackRealignment(MF);  in hasBP()
54 bool WebAssemblyFrameLowering::hasFP(const MachineFunction &MF) const {  in hasFP()
55   const MachineFrameInfo &MFI = MF.getFrameInfo();  in hasFP()
64   bool NeedsFixedReference = !hasBP(MF) || HasFixedSizedObjects;  in hasFP()
77     const MachineFunction &MF) const {  in hasReservedCallFrame()
78   return !MF.getFrameInfo().hasVarSizedObjects();  in hasReservedCallFrame()
84     const MachineFunction &MF) const {  in needsSPForLocalFrame()
85   auto &MFI = MF.getFrameInfo();  in needsSPForLocalFrame()
86   return MFI.getStackSize() || MFI.adjustsStack() || hasFP(MF);  in needsSPForLocalFrame()
93     const MachineFunction &MF) const {  in needsPrologForEH()
94   auto EHType = MF.getTarget().getMCAsmInfo()->getExceptionHandlingType();  in needsPrologForEH()
96          MF.getFunction().hasPersonalityFn() && MF.getFrameInfo().hasCalls();  in needsPrologForEH()
102 bool WebAssemblyFrameLowering::needsSP(const MachineFunction &MF) const {  in needsSP()
103   return needsSPForLocalFrame(MF) || needsPrologForEH(MF);  in needsSP()
111     const MachineFunction &MF) const {  in needsSPWriteback()
112   auto &MFI = MF.getFrameInfo();  in needsSPWriteback()
113   assert(needsSP(MF));  in needsSPWriteback()
122                        !MF.getFunction().hasFnAttribute(Attribute::NoRedZone);  in needsSPWriteback()
123   return needsSPForLocalFrame(MF) && !CanUseRedZone;  in needsSPWriteback()
127     unsigned SrcReg, MachineFunction &MF, MachineBasicBlock &MBB,  in writeSPToGlobal()  argument
129   const auto *TII = MF.getSubtarget<WebAssemblySubtarget>().getInstrInfo();  in writeSPToGlobal()
132   auto *SPSymbol = MF.createExternalSymbolName(ES);  in writeSPToGlobal()
140     MachineFunction &MF, MachineBasicBlock &MBB,  in eliminateCallFramePseudoInstr()  argument
142   assert(!I->getOperand(0).getImm() && (hasFP(MF) || hasBP(MF)) &&  in eliminateCallFramePseudoInstr()
144   const auto *TII = MF.getSubtarget<WebAssemblySubtarget>().getInstrInfo();  in eliminateCallFramePseudoInstr()
146       needsSPWriteback(MF)) {  in eliminateCallFramePseudoInstr()
148     writeSPToGlobal(WebAssembly::SP32, MF, MBB, I, DL);  in eliminateCallFramePseudoInstr()
153 void WebAssemblyFrameLowering::emitPrologue(MachineFunction &MF,  in emitPrologue()  argument
156   auto &MFI = MF.getFrameInfo();  in emitPrologue()
160   if (!needsSP(MF))  in emitPrologue()
164   const auto *TII = MF.getSubtarget<WebAssemblySubtarget>().getInstrInfo();  in emitPrologue()
165   auto &MRI = MF.getRegInfo();  in emitPrologue()
173       MRI.getTargetRegisterInfo()->getPointerRegClass(MF);  in emitPrologue()
179   auto *SPSymbol = MF.createExternalSymbolName(ES);  in emitPrologue()
183   bool HasBP = hasBP(MF);  in emitPrologue()
185     auto FI = MF.getInfo<WebAssemblyFunctionInfo>();  in emitPrologue()
213   if (hasFP(MF)) {  in emitPrologue()
220   if (StackSize && needsSPWriteback(MF)) {  in emitPrologue()
221     writeSPToGlobal(WebAssembly::SP32, MF, MBB, InsertPt, DL);  in emitPrologue()
225 void WebAssemblyFrameLowering::emitEpilogue(MachineFunction &MF,  in emitEpilogue()  argument
227   uint64_t StackSize = MF.getFrameInfo().getStackSize();  in emitEpilogue()
228   if (!needsSP(MF) || !needsSPWriteback(MF))  in emitEpilogue()
230   const auto *TII = MF.getSubtarget<WebAssemblySubtarget>().getInstrInfo();  in emitEpilogue()
231   auto &MRI = MF.getRegInfo();  in emitEpilogue()
241   if (hasBP(MF)) {  in emitEpilogue()
242     auto FI = MF.getInfo<WebAssemblyFunctionInfo>();  in emitEpilogue()
246         MRI.getTargetRegisterInfo()->getPointerRegClass(MF);  in emitEpilogue()
254         .addReg(hasFP(MF) ? WebAssembly::FP32 : WebAssembly::SP32)  in emitEpilogue()
257     SPReg = hasFP(MF) ? WebAssembly::FP32 : WebAssembly::SP32;  in emitEpilogue()
260   writeSPToGlobal(SPReg, MF, MBB, InsertPt, DL);  in emitEpilogue()