1# RUN: llc -O2 -o - %s -mtriple=aarch64-windows -start-before=shrink-wrap \
2# RUN:   -stop-after=prologepilog | FileCheck %s --check-prefix=WIN64
3# RUN: llc -O2 -o - %s -mtriple=aarch64-linux -start-before=shrink-wrap \
4# RUN:   -stop-after=prologepilog | FileCheck %s --check-prefix=LINUX
5
6# This tests checks that shrink wrapping bails out on Windows AMR64 due to the
7# use of Windows CFI.  We don't currently support fragments for WIndows EH on
8# ARM64.
9# The same test gets shrink wrapped on Linux ARM64.
10
11# WIN64-LABEL: bb.0.entry:
12# WIN64: early-clobber $sp = frame-setup STPXpre killed $fp, killed $lr, $sp, -4
13# WIN64-LABEL: bb.1:
14# WIN64-LABEL: bb.2.if.then:
15
16# LINUX-LABEL: bb.0.entry:
17# LINUX-LABEL: bb.1:
18# LINUX-LABEL: bb.2.if.then:
19# LINUX: early-clobber $sp = frame-setup STRXpre killed $fp, $sp, -32
20--- |
21  ; ModuleID = 'shrink.cpp'
22  target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
23  target triple = "aarch64-unknown-windows-msvc19.11.0"
24
25  define dso_local i32 @"?func@@YAHHH@Z"(i32 %a, i32 %b) local_unnamed_addr #0 {
26  entry:
27    %A = alloca [1000 x i32], align 4
28    %cmp = icmp sgt i32 %a, 1
29    br i1 %cmp, label %if.then, label %return
30
31  if.then:                                          ; preds = %entry
32    %0 = bitcast [1000 x i32]* %A to i8*
33    call void @llvm.lifetime.start.p0i8(i64 4000, i8* nonnull %0) #3
34    %arraydecay2 = bitcast [1000 x i32]* %A to i32*
35    call void @"?init@@YAXPEAH@Z"(i32* nonnull %arraydecay2)
36    %arrayidx = getelementptr inbounds [1000 x i32], [1000 x i32]* %A, i64 0, i64 100
37    %1 = load i32, i32* %arrayidx, align 4, !tbaa !2
38    %add = add i32 %b, 1
39    %add1 = add i32 %add, %1
40    call void @llvm.lifetime.end.p0i8(i64 4000, i8* nonnull %0) #3
41    br label %return
42
43  return:                                           ; preds = %entry, %if.then
44    %retval.0 = phi i32 [ %add1, %if.then ], [ 0, %entry ]
45    ret i32 %retval.0
46  }
47
48  ; Function Attrs: argmemonly nounwind
49  declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
50
51  declare dso_local void @"?init@@YAXPEAH@Z"(i32*) local_unnamed_addr #2
52
53  ; Function Attrs: argmemonly nounwind
54  declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
55
56  ; Function Attrs: nounwind
57  declare void @llvm.stackprotector(i8*, i8**) #3
58
59  attributes #0 = { "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" }
60  attributes #1 = { argmemonly nounwind }
61  attributes #2 = { "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" }
62  attributes #3 = { nounwind }
63
64  !llvm.module.flags = !{!0}
65  !llvm.ident = !{!1}
66
67  !0 = !{i32 1, !"wchar_size", i32 2}
68  !1 = !{!"clang version 8.0.0"}
69  !2 = !{!3, !3, i64 0}
70  !3 = !{!"int", !4, i64 0}
71  !4 = !{!"omnipotent char", !5, i64 0}
72  !5 = !{!"Simple C++ TBAA"}
73
74...
75---
76name:            '?func@@YAHHH@Z'
77alignment:       4
78exposesReturnsTwice: false
79legalized:       false
80regBankSelected: false
81selected:        false
82failedISel:      false
83tracksRegLiveness: true
84registers:
85liveins:
86  - { reg: '$w0', virtual-reg: '' }
87  - { reg: '$w1', virtual-reg: '' }
88frameInfo:
89  isFrameAddressTaken: false
90  isReturnAddressTaken: false
91  hasStackMap:     false
92  hasPatchPoint:   false
93  stackSize:       0
94  offsetAdjustment: 0
95  maxAlignment:    4
96  adjustsStack:    true
97  hasCalls:        true
98  stackProtector:  ''
99  maxCallFrameSize: 0
100  cvBytesOfCalleeSavedRegisters: 0
101  hasOpaqueSPAdjustment: false
102  hasVAStart:      false
103  hasMustTailInVarArgFunc: false
104  localFrameSize:  4000
105  savePoint:       ''
106  restorePoint:    ''
107fixedStack:
108stack:
109  - { id: 0, name: A, type: default, offset: 0, size: 4000, alignment: 4,
110      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
111      local-offset: -4000, debug-info-variable: '', debug-info-expression: '',
112      debug-info-location: '' }
113constants:
114body:             |
115  bb.0.entry:
116    successors: %bb.2(0x40000000), %bb.1(0x40000000)
117    liveins: $w0, $w1
118
119    dead $wzr = SUBSWri killed renamable $w0, 2, 0, implicit-def $nzcv
120    Bcc 10, %bb.2, implicit killed $nzcv
121
122  bb.1:
123    successors: %bb.3(0x80000000)
124
125    renamable $w0 = COPY $wzr
126    B %bb.3
127
128  bb.2.if.then:
129    successors: %bb.3(0x80000000)
130    liveins: $w1
131
132    renamable $w19 = COPY $w1
133    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
134    $x0 = ADDXri %stack.0.A, 0, 0
135    BL @"?init@@YAXPEAH@Z", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
136    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
137    renamable $w8 = LDRWui %stack.0.A, 100 :: (dereferenceable load 4 from %ir.arrayidx, !tbaa !2)
138    renamable $w8 = ADDWrr killed renamable $w19, killed renamable $w8
139    renamable $w0 = ADDWri killed renamable $w8, 1, 0
140
141  bb.3.return:
142    liveins: $w0
143
144    RET_ReallyLR implicit $w0
145
146...
147