54   IsWin64 = Is64Bit && TT.isOSWindows();  in X86RegisterInfo()
232   if (IsWin64 || (F.getCallingConv() == CallingConv::Win64))  in getGPRsForTailCall()
312     if (HasAVX512 && IsWin64)  in getCalleeSavedRegs()
316     if (HasAVX && IsWin64)  in getCalleeSavedRegs()
320     if (!HasAVX && !IsWin64 && Is64Bit)  in getCalleeSavedRegs()
328       if (IsWin64) {  in getCalleeSavedRegs()
381       return IsWin64 ? CSR_Win64_SwiftError_SaveList  in getCalleeSavedRegs()
384     if (IsWin64)  in getCalleeSavedRegs()
430     if (HasAVX512 && IsWin64)  in getCallPreservedMask()
434     if (HasAVX && IsWin64)  in getCallPreservedMask()
438     if (!HasAVX && !IsWin64 && Is64Bit)  in getCallPreservedMask()
446       if (IsWin64) {  in getCallPreservedMask()
498       return IsWin64 ? CSR_Win64_SwiftError_RegMask : CSR_64_SwiftError_RegMask;  in getCallPreservedMask()
499     return IsWin64 ? CSR_Win64_RegMask : CSR_64_RegMask;  in getCallPreservedMask()