3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
17 #include "X86.h"
62   unsigned StackPtr = 0;
63   unsigned SlotSize = 0;
64   int64_t StackProbeSize = 0;
67   StringRef getPassName() const override { return "X86 DynAlloca Expander"; }  in getPassName()
71 char X86DynAllocaExpander::ID = 0;
81   assert(MI->getOpcode() == X86::DYN_ALLOCA_32 ||  in getDynAllocaAmount()
82          MI->getOpcode() == X86::DYN_ALLOCA_64);  in getDynAllocaAmount()
83   assert(MI->getOperand(0).isReg());  in getDynAllocaAmount()
85   Register AmountReg = MI->getOperand(0).getReg();  in getDynAllocaAmount()
89       (Def->getOpcode() != X86::MOV32ri && Def->getOpcode() != X86::MOV64ri) ||  in getDynAllocaAmount()
100   if (AllocaAmount < 0 || AllocaAmount > StackProbeSize)  in getLowering()
113   case X86::PUSH32r:  in isPushPop()
114   case X86::PUSH32rmm:  in isPushPop()
115   case X86::PUSH32rmr:  in isPushPop()
116   case X86::PUSH32i:  in isPushPop()
117   case X86::PUSH64r:  in isPushPop()
118   case X86::PUSH64rmm:  in isPushPop()
119   case X86::PUSH64rmr:  in isPushPop()
120   case X86::PUSH64i32:  in isPushPop()
121   case X86::POP32r:  in isPushPop()
122   case X86::POP64r:  in isPushPop()
154       if (MI.getOpcode() == X86::DYN_ALLOCA_32 ||  in computeLowerings()
155           MI.getOpcode() == X86::DYN_ALLOCA_64) {  in computeLowerings()
168           Offset = 0;  in computeLowerings()
173         Offset = 0;  in computeLowerings()
174       } else if (MI.getOpcode() == X86::ADJCALLSTACKUP32 ||  in computeLowerings()
175                  MI.getOpcode() == X86::ADJCALLSTACKUP64) {  in computeLowerings()
176         Offset -= MI.getOperand(0).getImm();  in computeLowerings()
177       } else if (MI.getOpcode() == X86::ADJCALLSTACKDOWN32 ||  in computeLowerings()
178                  MI.getOpcode() == X86::ADJCALLSTACKDOWN64) {  in computeLowerings()
179         Offset += MI.getOperand(0).getImm();  in computeLowerings()
192     return X86::SUB64ri32;  in getSubOpcode()
193   return X86::SUB32ri;  in getSubOpcode()
202   if (Amount == 0) {  in lower()
210   bool Is64BitAlloca = MI->getOpcode() == X86::DYN_ALLOCA_64;  in lower()
224     unsigned RegA = Is64Bit ? X86::RAX : X86::EAX;  in lower()
225     BuildMI(*MBB, I, DL, TII->get(Is64Bit ? X86::PUSH64r : X86::PUSH32r))  in lower()
235     assert(Amount > 0);  in lower()
238       unsigned RegA = Is64Bit ? X86::RAX : X86::EAX;  in lower()
239       BuildMI(*MBB, I, DL, TII->get(Is64Bit ? X86::PUSH64r : X86::PUSH32r))  in lower()
251       unsigned RegA = Is64BitAlloca ? X86::RAX : X86::EAX;  in lower()
253           .addReg(MI->getOperand(0).getReg());  in lower()
261               TII->get(Is64BitAlloca ? X86::SUB64rr : X86::SUB32rr), StackPtr)  in lower()
263           .addReg(MI->getOperand(0).getReg());  in lower()
268   Register AmountReg = MI->getOperand(0).getReg();  in lower()