1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
# RUN: llc -emit-call-site-info -mtriple=arm-linux-gnu -debug-entry-values -run-pass if-converter %s -o -| FileCheck %s
# Vefify that the call site info will be updated after the optimization.
# This test case would previously trigger an assertion when
# deleting the call instruction.
# Test case is generated from:
# extern void
# foo (int* seg, int subseg);
# extern int* mri_common_symbol;
#
# void
# baa (int* secptr, int subseg)
# {
# if (! (secptr == 0 && subseg == 0))
# foo (secptr, subseg);
# mri_common_symbol = 0;
# }
#
# With slight change of MIR - substitution of BL instruction with BL_pred
# in order to trigger optimization.
# clang -target arm-linux-gnu -g -O2 -Xclang -femit-debug-entry-values
# %s -stop-before=if-convert
#
# CHECK: callSites:
# CHECK-NEXT: - { bb: {{.*}}, offset: {{.*}}, fwdArgRegs:
# CHECK-NEXT: - { arg: 0, reg: '$r0' }
# CHECK-NEXT: - { arg: 1, reg: '$r1' } }
--- |
; ModuleID = 'if-convert-call-site-info.c'
source_filename = "if-convert-call-site-info.c"
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "armv6kz-unknown-linux-gnueabihf"
@mri_common_symbol = external dso_local local_unnamed_addr global i32*, align 4
; Function Attrs: nounwind
define dso_local void @baa(i32* %secptr, i32 %subseg) local_unnamed_addr #0 !dbg !14 {
entry:
call void @llvm.dbg.value(metadata i32* %secptr, metadata !16, metadata !DIExpression()), !dbg !18
call void @llvm.dbg.value(metadata i32 %subseg, metadata !17, metadata !DIExpression()), !dbg !18
%cmp = icmp eq i32* %secptr, null, !dbg !19
%cmp1 = icmp eq i32 %subseg, 0, !dbg !21
%or.cond = and i1 %cmp, %cmp1, !dbg !22
br i1 %or.cond, label %if.end, label %if.then, !dbg !22
if.then: ; preds = %entry
tail call void @foo(i32* %secptr, i32 %subseg), !dbg !23
br label %if.end, !dbg !23
if.end: ; preds = %entry, %if.then
store i32* null, i32** @mri_common_symbol, align 4, !dbg !24, !tbaa !25
ret void, !dbg !29
}
declare !dbg !4 dso_local void @foo(i32*, i32) local_unnamed_addr
; Function Attrs: nounwind readnone speculatable willreturn
declare void @llvm.dbg.value(metadata, metadata, metadata)
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**)
attributes #0 = { "frame-pointer"="all" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!9, !10, !11, !12}
!llvm.ident = !{!13}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
!1 = !DIFile(filename: "if-convert-call-site-info.c", directory: "/")
!2 = !{}
!3 = !{!4}
!4 = !DISubprogram(name: "foo", scope: !1, file: !1, line: 10, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
!5 = !DISubroutineType(types: !6)
!6 = !{null, !7, !8}
!7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 32)
!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!9 = !{i32 2, !"Dwarf Version", i32 4}
!10 = !{i32 2, !"Debug Info Version", i32 3}
!11 = !{i32 1, !"wchar_size", i32 4}
!12 = !{i32 1, !"min_enum_size", i32 4}
!13 = !{!"clang version 10.0.0 "}
!14 = distinct !DISubprogram(name: "baa", scope: !1, file: !1, line: 14, type: !5, scopeLine: 15, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15)
!15 = !{!16, !17}
!16 = !DILocalVariable(name: "secptr", arg: 1, scope: !14, file: !1, line: 14, type: !7)
!17 = !DILocalVariable(name: "subseg", arg: 2, scope: !14, file: !1, line: 14, type: !8)
!18 = !DILocation(line: 0, scope: !14)
!19 = !DILocation(line: 16, column: 17, scope: !20)
!20 = distinct !DILexicalBlock(scope: !14, file: !1, line: 16, column: 7)
!21 = !DILocation(line: 16, column: 32, scope: !20)
!22 = !DILocation(line: 16, column: 22, scope: !20)
!23 = !DILocation(line: 17, column: 5, scope: !20)
!24 = !DILocation(line: 18, column: 21, scope: !14)
!25 = !{!26, !26, i64 0}
!26 = !{!"any pointer", !27, i64 0}
!27 = !{!"omnipotent char", !28, i64 0}
!28 = !{!"Simple C/C++ TBAA"}
!29 = !DILocation(line: 19, column: 1, scope: !14)
...
---
name: baa
alignment: 2
tracksRegLiveness: true
liveins:
- { reg: '$r0' }
- { reg: '$r1' }
frameInfo:
stackSize: 8
maxAlignment: 4
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
stack:
- { id: 0, type: spill-slot, offset: -4, size: 4, alignment: 4, callee-saved-register: '$lr',
callee-saved-restored: false }
- { id: 1, type: spill-slot, offset: -8, size: 4, alignment: 4, callee-saved-register: '$r11' }
callSites:
- { bb: 2, offset: 0, fwdArgRegs:
- { arg: 0, reg: '$r0' }
- { arg: 1, reg: '$r1' } }
constants:
- id: 0
value: 'i32** null'
alignment: 4
machineFunctionInfo: {}
body: |
bb.0.entry:
successors: %bb.1(0x60000000), %bb.2(0x20000000)
liveins: $r0, $r1, $lr
DBG_VALUE $r0, $noreg, !16, !DIExpression(), debug-location !18
DBG_VALUE $r0, $noreg, !16, !DIExpression(), debug-location !18
DBG_VALUE $r1, $noreg, !17, !DIExpression(), debug-location !18
DBG_VALUE $r1, $noreg, !17, !DIExpression(), debug-location !18
$sp = frame-setup STMDB_UPD $sp, 14, $noreg, killed $r11, killed $lr
frame-setup CFI_INSTRUCTION def_cfa_offset 8
frame-setup CFI_INSTRUCTION offset $lr, -4
frame-setup CFI_INSTRUCTION offset $r11, -8
$r11 = frame-setup MOVr killed $sp, 14, $noreg, $noreg
frame-setup CFI_INSTRUCTION def_cfa_register $r11
CMPri renamable $r0, 0, 14, $noreg, implicit-def $cpsr, debug-location !22
Bcc %bb.2, 1, killed $cpsr, debug-location !22
bb.1.entry:
successors: %bb.3(0x55555555), %bb.2(0x2aaaaaab)
liveins: $r0, $r1
CMPri renamable $r1, 0, 14, $noreg, implicit-def $cpsr, debug-location !22
Bcc %bb.3, 0, killed $cpsr, debug-location !22
bb.2.if.then:
liveins: $r0, $r1
BL_pred @foo, 14, $noreg, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit $r0, implicit $r1, implicit-def $sp, debug-location !23
bb.3.if.end:
renamable $r0 = LDRi12 %const.0, 0, 14, $noreg, debug-location !24 :: (load 4 from constant-pool)
renamable $r1 = MOVi 0, 14, $noreg, $noreg
STRi12 killed renamable $r1, killed renamable $r0, 0, 14, $noreg, debug-location !24 :: (store 4 into @mri_common_symbol, !tbaa !25)
$sp = LDMIA_RET $sp, 14, $noreg, def $r11, def $pc, debug-location !29
...
|
