1# RUN: llc -o - %s -mtriple=aarch64-windows -start-before=prologepilog \ 2# RUN: -stop-after=prologepilog | FileCheck %s 3# Test that stack probe results in Nop unwind codes in the prologue. Test 4# save_fplr, save_reg_x and stack_alloc with multiple updates 5 6# CHECK: early-clobber $sp = frame-setup STPXpre killed $fp, killed $lr, $sp, -2 7# CHECK-NEXT: frame-setup SEH_SaveFPLR_X -16 8# CHECK-NEXT: $fp = frame-setup ADDXri $sp, 0, 0 9# CHECK-NEXT: frame-setup SEH_SetFP 10# CHECK-NEXT: frame-setup SEH_PrologEnd 11# CHECK-NEXT: $sp = frame-setup SUBXri $sp, 32, 0 12# CHECK: frame-destroy SEH_EpilogStart 13# CHECK-NEXT: $sp = frame-destroy ADDXri $fp, 0, 0 14# CHECK-NEXT: frame-destroy SEH_SetFP 15# CHECK-NEXT: early-clobber $sp, $fp, $lr = frame-destroy LDPXpost $sp, 2 16# CHECK-NEXT: frame-destroy SEH_SaveFPLR_X -16 17# CHECK-NEXT: frame-destroy SEH_EpilogEnd 18# CHECK-NEXT: RET_ReallyLR implicit killed $w0 19--- | 20 target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128" 21 target triple = "aarch64-unknown-windows-msvc19.11.0" 22 23 ; Function Attrs: noinline optnone 24 define dso_local i32 @"?func@@YAHHHHH@Z"(i32 %n, i32 %idx, i32 %b, i32 %c) #0 { 25 entry: 26 %c.addr = alloca i32, align 4 27 %b.addr = alloca i32, align 4 28 %idx.addr = alloca i32, align 4 29 %n.addr = alloca i32, align 4 30 %a = alloca ptr, align 8 31 store i32 %c, ptr %c.addr, align 4 32 store i32 %b, ptr %b.addr, align 4 33 store i32 %idx, ptr %idx.addr, align 4 34 store i32 %n, ptr %n.addr, align 4 35 %0 = load i32, ptr %n.addr, align 4 36 %conv = sext i32 %0 to i64 37 %1 = alloca i8, i64 %conv, align 16 38 %2 = bitcast ptr %1 to ptr 39 store ptr %2, ptr %a, align 8 40 %3 = load ptr, ptr %a, align 8 41 call void @"?init@@YAXPEAH@Z"(ptr %3) 42 ret i32 0 43 } 44 45 declare dso_local void @"?init@@YAXPEAH@Z"(ptr) #1 46 47 ; Function Attrs: nounwind 48 declare void @llvm.stackprotector(ptr, ptr) #2 49 50 attributes #0 = { noinline optnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+neon" "unsafe-fp-math"="false" "use-soft-float"="false" } 51 attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+neon" "unsafe-fp-math"="false" "use-soft-float"="false" } 52 attributes #2 = { nounwind } 53 54... 55--- 56name: '?func@@YAHHHHH@Z' 57alignment: 4 58exposesReturnsTwice: false 59legalized: false 60regBankSelected: false 61selected: false 62failedISel: false 63tracksRegLiveness: true 64hasWinCFI: false 65registers: 66liveins: 67 - { reg: '$w0', virtual-reg: '' } 68 - { reg: '$w1', virtual-reg: '' } 69 - { reg: '$w2', virtual-reg: '' } 70 - { reg: '$w3', virtual-reg: '' } 71frameInfo: 72 isFrameAddressTaken: false 73 isReturnAddressTaken: false 74 hasStackMap: false 75 hasPatchPoint: false 76 stackSize: 0 77 offsetAdjustment: 0 78 maxAlignment: 8 79 adjustsStack: true 80 hasCalls: true 81 stackProtector: '' 82 maxCallFrameSize: 0 83 cvBytesOfCalleeSavedRegisters: 0 84 hasOpaqueSPAdjustment: false 85 hasVAStart: false 86 hasMustTailInVarArgFunc: false 87 localFrameSize: 24 88 savePoint: '' 89 restorePoint: '' 90fixedStack: 91stack: 92 - { id: 0, name: c.addr, type: default, offset: 0, size: 4, alignment: 4, 93 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 94 local-offset: -4, debug-info-variable: '', debug-info-expression: '', 95 debug-info-location: '' } 96 - { id: 1, name: b.addr, type: default, offset: 0, size: 4, alignment: 4, 97 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 98 local-offset: -8, debug-info-variable: '', debug-info-expression: '', 99 debug-info-location: '' } 100 - { id: 2, name: idx.addr, type: default, offset: 0, size: 4, alignment: 4, 101 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 102 local-offset: -12, debug-info-variable: '', debug-info-expression: '', 103 debug-info-location: '' } 104 - { id: 3, name: n.addr, type: default, offset: 0, size: 4, alignment: 4, 105 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 106 local-offset: -16, debug-info-variable: '', debug-info-expression: '', 107 debug-info-location: '' } 108 - { id: 4, name: a, type: default, offset: 0, size: 8, alignment: 8, 109 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 110 local-offset: -24, debug-info-variable: '', debug-info-expression: '', 111 debug-info-location: '' } 112 - { id: 5, name: '', type: variable-sized, offset: 0, 113 alignment: 1, stack-id: default, callee-saved-register: '', callee-saved-restored: true, 114 local-offset: -24, debug-info-variable: '', debug-info-expression: '', 115 debug-info-location: '' } 116 - { id: 6, name: '', type: spill-slot, offset: 0, size: 8, alignment: 8, 117 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 118 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 119constants: 120body: | 121 bb.0.entry: 122 liveins: $w0, $w1, $w2, $w3 123 124 STRWui killed renamable $w3, %stack.0.c.addr, 0 :: (store (s32) into %ir.c.addr) 125 STRWui killed renamable $w2, %stack.1.b.addr, 0 :: (store (s32) into %ir.b.addr) 126 STRWui killed renamable $w1, %stack.2.idx.addr, 0 :: (store (s32) into %ir.idx.addr) 127 STRWui killed renamable $w0, %stack.3.n.addr, 0 :: (store (s32) into %ir.n.addr) 128 renamable $x8 = LDRSWui %stack.3.n.addr, 0 :: (dereferenceable load (s32) from %ir.n.addr) 129 ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp 130 renamable $x8 = nuw ADDXri killed renamable $x8, 15, 0 131 renamable $x8 = UBFMXri killed renamable $x8, 4, 63 132 $x15 = COPY renamable $x8 133 STRXui killed $x8, %stack.6, 0 :: (store (s64) into %stack.6) 134 BL &__chkstk, csr_aarch64_stackprobe_windows, implicit-def dead $lr, implicit $sp, implicit killed $x15 135 renamable $x8 = COPY $sp 136 $x15 = LDRXui %stack.6, 0 :: (load (s64) from %stack.6) 137 renamable $x8 = SUBSXrs killed renamable $x8, killed renamable $x15, 4, implicit-def dead $nzcv 138 $sp = COPY renamable $x8 139 ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp 140 STRXui killed renamable $x8, %stack.4.a, 0 :: (store (s64) into %ir.a) 141 renamable $x0 = LDRXui %stack.4.a, 0 :: (dereferenceable load (s64) from %ir.a) 142 ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp 143 BL @"?init@@YAXPEAH@Z", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $x0, implicit-def $sp 144 ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp 145 renamable $w1 = COPY $wzr 146 $w0 = COPY killed renamable $w1 147 RET_ReallyLR implicit killed $w0 148 149... 150