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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
; RUN: llc -enable-fs-discriminator < %s | FileCheck %s
;;
;; C source code for the test (compiler at -O3):
;; // A test case for loop unroll.
;;
;; __attribute__((noinline)) int bar(int i){
;; volatile int j;
;; j = i;
;; return j;
;; }
;;
;; unsigned sum;
;; __attribute__((noinline)) void work(int i){
;; if (sum % 7)
;; sum += i;
;; else
;; sum -= i;
;; }
;;
;; __attribute__((noinline)) void foo(){
;; int i, j;
;; for (j = 0; j < 48; j++)
;; for (i = 0; i < 4; i++) {
;; int ii = bar(i+j*48);
;; if (ii % 2)
;; work(ii*2);
;; if (ii % 4)
;; work(ii*3);
;; }
;; }
;;
;; int main() {
;; int i;
;; for (i = 0; i < 10000000; i++) {
;; foo();
;; }
;; }
;;
;; Check that fs-afdo discriminators are generated.
; CHECK: .loc 1 23 9 is_stmt 0 discriminator 1 # unroll.c:23:9
; CHECK: .loc 1 23 9 is_stmt 0 discriminator 3892314113 # unroll.c:23:9
; CHECK: .loc 1 23 9 is_stmt 0 discriminator 2818572289 # unroll.c:23:9
; CHECK: .loc 1 23 9 is_stmt 0 discriminator 3623878657 # unroll.c:23:9
;;
;; Check that variable __llvm_fs_discriminator__ is generated.
; CHECK: .type __llvm_fs_discriminator__,@object # @__llvm_fs_discriminator__
; CHECK: .section .rodata,"a",@progbits
; CHECK: .weak __llvm_fs_discriminator__
; CHECK: __llvm_fs_discriminator__:
; CHECK: .byte 1
; CHECK: .size __llvm_fs_discriminator__, 1
target triple = "x86_64-unknown-linux-gnu"
@sum = dso_local local_unnamed_addr global i32 0, align 4
declare i32 @bar(i32 %i) #0
declare void @work(i32 %i) #2
define dso_local void @foo() #0 !dbg !29 {
entry:
br label %for.cond1.preheader, !dbg !30
for.cond1.preheader:
%j.012 = phi i32 [ 0, %entry ], [ %inc11, %if.end9.3 ]
%mul = mul nuw nsw i32 %j.012, 48
%call = tail call i32 @bar(i32 %mul), !dbg !32
%0 = and i32 %call, 1, !dbg !33
%tobool.not = icmp eq i32 %0, 0, !dbg !33
br i1 %tobool.not, label %if.end, label %if.then, !dbg !35
if.then:
%mul4 = shl nsw i32 %call, 1, !dbg !36
tail call void @work(i32 %mul4), !dbg !37
br label %if.end, !dbg !38
if.end:
%1 = and i32 %call, 3, !dbg !39
%tobool6.not = icmp eq i32 %1, 0, !dbg !39
br i1 %tobool6.not, label %if.end9, label %if.then7, !dbg !40
if.then7:
%mul8 = mul nsw i32 %call, 3, !dbg !41
tail call void @work(i32 %mul8), !dbg !42
br label %if.end9, !dbg !43
if.end9:
%add.1 = or i32 %mul, 1, !dbg !44
%call.1 = tail call i32 @bar(i32 %add.1), !dbg !32
%2 = and i32 %call.1, 1, !dbg !33
%tobool.not.1 = icmp eq i32 %2, 0, !dbg !33
br i1 %tobool.not.1, label %if.end.1, label %if.then.1, !dbg !35
for.end12:
ret void, !dbg !45
if.then.1:
%mul4.1 = shl nsw i32 %call.1, 1, !dbg !36
tail call void @work(i32 %mul4.1), !dbg !37
br label %if.end.1, !dbg !38
if.end.1:
%3 = and i32 %call.1, 3, !dbg !39
%tobool6.not.1 = icmp eq i32 %3, 0, !dbg !39
br i1 %tobool6.not.1, label %if.end9.1, label %if.then7.1, !dbg !40
if.then7.1:
%mul8.1 = mul nsw i32 %call.1, 3, !dbg !41
tail call void @work(i32 %mul8.1), !dbg !42
br label %if.end9.1, !dbg !43
if.end9.1:
%add.2 = or i32 %mul, 2, !dbg !44
%call.2 = tail call i32 @bar(i32 %add.2), !dbg !32
%4 = and i32 %call.2, 1, !dbg !33
%tobool.not.2 = icmp eq i32 %4, 0, !dbg !33
br i1 %tobool.not.2, label %if.end.2, label %if.then.2, !dbg !35
if.then.2:
%mul4.2 = shl nsw i32 %call.2, 1, !dbg !36
tail call void @work(i32 %mul4.2), !dbg !37
br label %if.end.2, !dbg !38
if.end.2:
%5 = and i32 %call.2, 3, !dbg !39
%tobool6.not.2 = icmp eq i32 %5, 0, !dbg !39
br i1 %tobool6.not.2, label %if.end9.2, label %if.then7.2, !dbg !40
if.then7.2:
%mul8.2 = mul nsw i32 %call.2, 3, !dbg !41
tail call void @work(i32 %mul8.2), !dbg !42
br label %if.end9.2, !dbg !43
if.end9.2:
%add.3 = or i32 %mul, 3, !dbg !44
%call.3 = tail call i32 @bar(i32 %add.3), !dbg !32
%6 = and i32 %call.3, 1, !dbg !33
%tobool.not.3 = icmp eq i32 %6, 0, !dbg !33
br i1 %tobool.not.3, label %if.end.3, label %if.then.3, !dbg !35
if.then.3:
%mul4.3 = shl nsw i32 %call.3, 1, !dbg !36
tail call void @work(i32 %mul4.3), !dbg !37
br label %if.end.3, !dbg !38
if.end.3:
%7 = and i32 %call.3, 3, !dbg !39
%tobool6.not.3 = icmp eq i32 %7, 0, !dbg !39
br i1 %tobool6.not.3, label %if.end9.3, label %if.then7.3, !dbg !40
if.then7.3:
%mul8.3 = mul nsw i32 %call.3, 3, !dbg !41
tail call void @work(i32 %mul8.3), !dbg !42
br label %if.end9.3, !dbg !43
if.end9.3:
%inc11 = add nuw nsw i32 %j.012, 1, !dbg !46
%exitcond.not = icmp eq i32 %inc11, 48, !dbg !48
br i1 %exitcond.not, label %for.end12, label %for.cond1.preheader, !dbg !30, !llvm.loop !49
}
attributes #0 = { noinline nounwind uwtable "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { argmemonly nounwind willreturn }
attributes #2 = { nofree noinline norecurse nounwind uwtable "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #3 = { nounwind uwtable "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2, splitDebugInlining: false, debugInfoForProfiling: true, nameTableKind: None)
!1 = !DIFile(filename: "unroll.c", directory: "a/")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!7 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!8 = !DISubroutineType(types: !2)
!9 = !DILocation(line: 4, column: 3, scope: !7)
!10 = !DILocation(line: 5, column: 5, scope: !7)
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !13, i64 0}
!13 = !{!"omnipotent char", !14, i64 0}
!14 = !{!"Simple C/C++ TBAA"}
!15 = !DILocation(line: 6, column: 10, scope: !7)
!16 = !DILocation(line: 7, column: 1, scope: !7)
!17 = !DILocation(line: 6, column: 3, scope: !18)
!18 = !DILexicalBlockFile(scope: !7, file: !1, discriminator: 1)
!19 = distinct !DISubprogram(name: "work", scope: !1, file: !1, line: 10, type: !8, scopeLine: 10, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!20 = !DILocation(line: 11, column: 7, scope: !19)
!21 = !DILocation(line: 11, column: 11, scope: !22)
!22 = !DILexicalBlockFile(scope: !19, file: !1, discriminator: 1)
!23 = !DILocation(line: 11, column: 11, scope: !24)
!24 = !DILexicalBlockFile(scope: !19, file: !1, discriminator: 2)
!25 = !DILocation(line: 11, column: 7, scope: !26)
!26 = !DILexicalBlockFile(scope: !19, file: !1, discriminator: 3)
!27 = !DILocation(line: 0, scope: !22)
!28 = !DILocation(line: 15, column: 1, scope: !19)
!29 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 17, type: !8, scopeLine: 17, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!30 = !DILocation(line: 19, column: 3, scope: !31)
!31 = !DILexicalBlockFile(scope: !29, file: !1, discriminator: 2)
!32 = !DILocation(line: 21, column: 16, scope: !31)
!33 = !DILocation(line: 22, column: 14, scope: !34)
!34 = !DILexicalBlockFile(scope: !29, file: !1, discriminator: 1)
!35 = !DILocation(line: 22, column: 11, scope: !31)
!36 = !DILocation(line: 23, column: 16, scope: !29)
!37 = !DILocation(line: 23, column: 9, scope: !34)
!38 = !DILocation(line: 23, column: 9, scope: !31)
!39 = !DILocation(line: 24, column: 14, scope: !34)
!40 = !DILocation(line: 24, column: 11, scope: !31)
!41 = !DILocation(line: 25, column: 16, scope: !29)
!42 = !DILocation(line: 25, column: 9, scope: !34)
!43 = !DILocation(line: 25, column: 9, scope: !31)
!44 = !DILocation(line: 21, column: 21, scope: !34)
!45 = !DILocation(line: 27, column: 1, scope: !29)
!46 = !DILocation(line: 19, column: 24, scope: !47)
!47 = !DILexicalBlockFile(scope: !29, file: !1, discriminator: 3)
!48 = !DILocation(line: 19, column: 17, scope: !34)
!49 = distinct !{!49, !50, !51}
!50 = !DILocation(line: 19, column: 3, scope: !29)
!51 = !DILocation(line: 26, column: 3, scope: !29)
!52 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 29, type: !8, scopeLine: 29, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!53 = !DILocation(line: 31, column: 3, scope: !54)
!54 = !DILexicalBlockFile(scope: !52, file: !1, discriminator: 2)
!55 = !DILocation(line: 32, column: 5, scope: !52)
!56 = !DILocation(line: 31, column: 30, scope: !57)
!57 = !DILexicalBlockFile(scope: !52, file: !1, discriminator: 3)
!58 = !DILocation(line: 31, column: 17, scope: !59)
!59 = !DILexicalBlockFile(scope: !52, file: !1, discriminator: 1)
!60 = distinct !{!60, !61, !62}
!61 = !DILocation(line: 31, column: 3, scope: !52)
!62 = !DILocation(line: 33, column: 3, scope: !52)
!63 = !DILocation(line: 34, column: 1, scope: !52)
|
