# RUN: llc -o - %s -mtriple=aarch64-windows -start-before=prologepilog \
# RUN: -stop-after=prologepilog | FileCheck %s
# Test that stack probe results in Nop unwind codes in the prologue. Test
# save_fplr, save_reg_x and stack_alloc with multiple updates.
# CHECK: early-clobber $sp = frame-setup STPXpre killed $fp, killed $lr, $sp, -2
# CHECK-NEXT: frame-setup SEH_SaveFPLR_X -16
# CHECK-NEXT: $x15 = frame-setup MOVZXi 56009, 0
# CHECK-NEXT: frame-setup SEH_Nop
# CHECK-NEXT: $x15 = frame-setup MOVKXi $x15, 2, 16
# CHECK-NEXT: frame-setup SEH_Nop
# CHECK-NEXT: frame-setup BL &__chkstk, implicit-def $lr, implicit $sp, implicit $x15
# CHECK-NEXT: frame-setup SEH_Nop
# CHECK-NEXT: $sp = frame-setup SUBXrx64 killed $sp, killed $x15, 28
# CHECK-NEXT: frame-setup SEH_StackAlloc 2993296
# CHECK-NEXT: frame-setup SEH_PrologEnd
# CHECK: frame-destroy SEH_EpilogStart
# CHECK-NEXT: $sp = frame-destroy ADDXri $sp, 730, 12
# CHECK-NEXT: frame-destroy SEH_StackAlloc 2990080
# CHECK-NEXT: $sp = frame-destroy ADDXri $sp, 3216, 0
# CHECK-NEXT: frame-destroy SEH_StackAlloc 3216
# CHECK-NEXT: early-clobber $sp, $fp, $lr = frame-destroy LDPXpost $sp, 2
# CHECK-NEXT: frame-destroy SEH_SaveFPLR_X -16
# CHECK-NEXT: frame-destroy SEH_EpilogEnd
# CHECK-NEXT: RET_ReallyLR implicit killed $w0
--- |
target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-unknown-windows-msvc19.11.0"
; Function Attrs: noinline optnone
define dso_local i32 @"?func@@YAHH@Z"(i32 %i) #0 {
entry:
%retval = alloca i32, align 4
%i.addr = alloca i32, align 4
%A = alloca [748193 x i32], align 4
%a = alloca i32, align 4
%B = alloca [123 x i32], align 4
store i32 %i, i32* %i.addr, align 4
%0 = load i32, i32* %i.addr, align 4
%add = add nsw i32 %0, 2
store i32 %add, i32* %a, align 4
%call = call i32 @"?func2@@YAHXZ"()
%1 = load i32, i32* %i.addr, align 4
%cmp = icmp sgt i32 %1, 2
br i1 %cmp, label %if.then, label %if.else
if.then: ; preds = %entry
%call1 = call i32 @"?func2@@YAHXZ"()
store i32 %call1, i32* %retval, align 4
br label %return
if.else: ; preds = %entry
%arraydecay = getelementptr inbounds [123 x i32], [123 x i32]* %B, i32 0, i32 0
%call2 = call i32 @"?func3@@YAHPEAH@Z"(i32* %arraydecay)
store i32 %call2, i32* %retval, align 4
br label %return
return: ; preds = %if.else, %if.then
%2 = load i32, i32* %retval, align 4
ret i32 %2
}
declare dso_local i32 @"?func2@@YAHXZ"() #1
declare dso_local i32 @"?func3@@YAHPEAH@Z"(i32*) #1
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #2
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" }
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" }
attributes #2 = { nounwind }
...
---
name: '?func@@YAHH@Z'
alignment: 4
exposesReturnsTwice: false
legalized: true
regBankSelected: true
selected: true
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
registers:
liveins:
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 8
adjustsStack: true
hasCalls: true
stackProtector: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
localFrameSize: 2993276
savePoint: ''
restorePoint: ''
fixedStack:
stack:
- { id: 0, name: retval, type: default, offset: 0, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
local-offset: -4, debug-info-variable: '', debug-info-expression: '',
debug-info-location: '' }
- { id: 1, name: i.addr, type: default, offset: 0, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
local-offset: -8, debug-info-variable: '', debug-info-expression: '',
debug-info-location: '' }
- { id: 2, name: A, type: default, offset: 0, size: 2992772, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
local-offset: -2992780, debug-info-variable: '', debug-info-expression: '',
debug-info-location: '' }
- { id: 3, name: a, type: default, offset: 0, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
local-offset: -2992784, debug-info-variable: '', debug-info-expression: '',
debug-info-location: '' }
- { id: 4, name: B, type: default, offset: 0, size: 492, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
local-offset: -2993276, debug-info-variable: '', debug-info-expression: '',
debug-info-location: '' }
- { id: 5, name: '', type: spill-slot, offset: 0, size: 8, alignment: 8,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 6, name: '', type: spill-slot, offset: 0, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
constants:
body: |
bb.1.entry:
successors: %bb.2(0x40000000), %bb.3(0x40000000)
liveins: $w0
renamable $x8 = ADDXri %stack.1.i.addr, 0, 0
renamable $w9 = MOVi32imm 2
STRWui killed renamable $w0, renamable $x8, 0 :: (store (s32) into %ir.i.addr)
renamable $w0 = LDRWui renamable $x8, 0 :: (load (s32) from %ir.i.addr)
renamable $w0 = ADDWri killed renamable $w0, 2, 0
STRWui killed renamable $w0, %stack.3.a, 0 :: (store (s32) into %ir.a)
ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
STRXui killed $x8, %stack.5, 0 :: (store (s64) into %stack.5)
STRWui killed $w9, %stack.6, 0 :: (store (s32) into %stack.6)
BL @"?func2@@YAHXZ", csr_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit-def $w0
ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
$x8 = LDRXui %stack.5, 0 :: (load (s64) from %stack.5)
renamable $w9 = LDRWui killed renamable $x8, 0 :: (load (s32) from %ir.i.addr)
$w10 = LDRWui %stack.6, 0 :: (load (s32) from %stack.6)
$wzr = SUBSWrr killed renamable $w9, killed renamable $w10, implicit-def $nzcv
renamable $w9 = CSINCWr $wzr, $wzr, 13, implicit $nzcv
TBNZW killed renamable $w9, 0, %bb.2
B %bb.3
bb.2.if.then:
successors: %bb.4(0x80000000)
ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
BL @"?func2@@YAHXZ", csr_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit-def $w0
ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
$x8 = LDRXui %stack.5, 0 :: (load (s64) from %stack.5)
STRWui killed renamable $w0, killed renamable $x8, 1 :: (store (s32) into %ir.retval)
B %bb.4
bb.3.if.else:
successors: %bb.4(0x80000000)
renamable $x8 = ADDXri %stack.4.B, 0, 0
ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
$x0 = COPY killed renamable $x8
BL @"?func3@@YAHPEAH@Z", csr_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit killed $x0, implicit-def $w0
ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
$x8 = LDRXui %stack.5, 0 :: (load (s64) from %stack.5)
STRWui killed renamable $w0, killed renamable $x8, 1 :: (store (s32) into %ir.retval)
bb.4.return:
$x8 = LDRXui %stack.5, 0 :: (load (s64) from %stack.5)
renamable $w0 = LDRWui killed renamable $x8, 1 :: (load (s32) from %ir.retval)
RET_ReallyLR implicit killed $w0
...