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1# RUN: llc -o - %s -mtriple=aarch64-windows -start-before=prologepilog \2# RUN: -stop-after=prologepilog | FileCheck %s3 4# Check that the callee-saved registers are saved starting with a STP5# with predecrement, followed by a separate stack adjustment later,6# if the optsize attribute is set.7 8# CHECK: early-clobber $sp = frame-setup STPXpre killed $x19, killed $x20, $sp, -29# CHECK-NEXT: frame-setup SEH_SaveRegP_X 19, 20, -1610# CHECK-NEXT: $sp = frame-setup SUBXri $sp, 16, 011# CHECK-NEXT: frame-setup SEH_StackAlloc 1612# CHECK-NEXT: frame-setup SEH_PrologEnd13 14--- |15 16 define dso_local i32 @func(i32 %a) optsize { ret i32 %a }17 18...19---20name: func21alignment: 422exposesReturnsTwice: false23legalized: false24regBankSelected: false25selected: false26failedISel: false27tracksRegLiveness: true28hasWinCFI: false29registers: []30liveins: []31frameInfo:32 isFrameAddressTaken: false33 isReturnAddressTaken: false34 hasStackMap: false35 hasPatchPoint: false36 stackSize: 037 offsetAdjustment: 038 maxAlignment: 439 adjustsStack: false40 hasCalls: false41 stackProtector: ''42 maxCallFrameSize: 043 cvBytesOfCalleeSavedRegisters: 044 hasOpaqueSPAdjustment: false45 hasVAStart: false46 hasMustTailInVarArgFunc: false47 localFrameSize: 448 savePoint: []49 restorePoint: []50fixedStack: []51stack:52 - { id: 0, name: '', type: default, offset: 0, size: 4, alignment: 4,53 stack-id: default, callee-saved-register: '', callee-saved-restored: true,54 local-offset: -4, debug-info-variable: '', debug-info-expression: '',55 debug-info-location: '' }56callSites: []57constants: []58machineFunctionInfo: {}59body: |60 bb.0:61 liveins: $x0, $x19, $x2062 63 renamable $x8 = ADDXri %stack.0, 0, 064 $x19 = ADDXrr $x0, $x865 $x20 = ADDXrr $x19, $x066 $x0 = ADDXrr $x0, killed $x2067 68 RET_ReallyLR69 70...71