xref: /llvm-project/llvm/test/Transforms/SampleProfile/fnptr.ll (revision bb6497ffa6a88d1b3a32101d9b6519094d75ef2a) 
1; The two profiles used in this test are the same but encoded in different
2; formats. This checks that we produce the same profile annotations regardless
3; of the profile format.
4;
5; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/fnptr.prof | opt -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
6; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/fnptr.binprof | opt -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
7
8; CHECK:   edge %for.body3 -> %if.then probability is 0x1a56a56a / 0x80000000 = 20.58%
9; CHECK:   edge %for.body3 -> %if.else probability is 0x65a95a96 / 0x80000000 = 79.42%
10; CHECK:   edge %for.inc -> %for.inc12 probability is 0x000fbd1c / 0x80000000 = 0.05%
11; CHECK:   edge %for.inc -> %for.body3 probability is 0x7ff042e4 / 0x80000000 = 99.95%
12; CHECK:   edge %for.inc12 -> %for.end14 probability is 0x04000000 / 0x80000000 = 3.12%
13; CHECK:   edge %for.inc12 -> %for.cond1.preheader probability is 0x7c000000 / 0x80000000 = 96.88%
14
15; Original C++ test case.
16;
17; #include <stdlib.h>
18; #include <math.h>
19; #include <stdio.h>
20;
21; #define N 10000
22; #define M 6000
23;
24; double foo(int x) {
25;   return x * sin((double)x);
26; }
27;
28; double bar(int x) {
29;   return x - cos((double)x);
30; }
31;
32; int main() {
33;   double (*fptr)(int);
34;   double S = 0;
35;   for (int i = 0; i < N; i++)
36;     for (int j = 0; j < M; j++) {
37;       fptr = (rand() % 100 < 30) ? foo : bar;
38;       if (rand() % 100 < 10)
39;         S += (*fptr)(i + j * 300);
40;       else
41;         S += (*fptr)(i - j / 840);
42;     }
43;   printf("S = %lf\n", S);
44;   return 0;
45; }
46
47@.str = private unnamed_addr constant [9 x i8] c"S = %lf\0A\00", align 1
48
49define double @_Z3fooi(i32 %x) #0 !dbg !3 {
50entry:
51  %conv = sitofp i32 %x to double, !dbg !2
52  %call = tail call double @sin(double %conv) #3, !dbg !8
53  %mul = fmul double %conv, %call, !dbg !8
54  ret double %mul, !dbg !8
55}
56
57declare double @sin(double) #1
58
59define double @_Z3bari(i32 %x) #0 !dbg !10 {
60entry:
61  %conv = sitofp i32 %x to double, !dbg !9
62  %call = tail call double @cos(double %conv) #3, !dbg !11
63  %sub = fsub double %conv, %call, !dbg !11
64  ret double %sub, !dbg !11
65}
66
67declare double @cos(double) #1
68
69define i32 @main() #2 !dbg !13 {
70entry:
71  br label %for.cond1.preheader, !dbg !12
72
73for.cond1.preheader:                              ; preds = %for.inc12, %entry
74  %i.025 = phi i32 [ 0, %entry ], [ %inc13, %for.inc12 ]
75  %S.024 = phi double [ 0.000000e+00, %entry ], [ %S.2.lcssa, %for.inc12 ]
76  br label %for.body3, !dbg !14
77
78for.body3:                                        ; preds = %for.inc, %for.cond1.preheader
79  %j.023 = phi i32 [ 0, %for.cond1.preheader ], [ %inc, %for.inc ]
80  %S.122 = phi double [ %S.024, %for.cond1.preheader ], [ %S.2, %for.inc ]
81  %call = tail call i32 @rand() #3, !dbg !15
82  %rem = srem i32 %call, 100, !dbg !15
83  %cmp4 = icmp slt i32 %rem, 30, !dbg !15
84  %_Z3fooi._Z3bari = select i1 %cmp4, ptr @_Z3fooi, ptr @_Z3bari, !dbg !15
85  %call5 = tail call i32 @rand() #3, !dbg !16
86  %rem6 = srem i32 %call5, 100, !dbg !16
87  %cmp7 = icmp slt i32 %rem6, 10, !dbg !16
88  br i1 %cmp7, label %if.then, label %if.else, !dbg !16
89
90if.then:                                          ; preds = %for.body3
91  %mul = mul nsw i32 %j.023, 300, !dbg !18
92  %add = add nsw i32 %mul, %i.025, !dbg !18
93  %call8 = tail call double %_Z3fooi._Z3bari(i32 %add), !dbg !18
94  br label %for.inc, !dbg !18
95
96if.else:                                          ; preds = %for.body3
97  %div = sdiv i32 %j.023, 840, !dbg !19
98  %sub = sub nsw i32 %i.025, %div, !dbg !19
99  %call10 = tail call double %_Z3fooi._Z3bari(i32 %sub), !dbg !19
100  br label %for.inc
101
102for.inc:                                          ; preds = %if.then, %if.else
103  %call8.pn = phi double [ %call8, %if.then ], [ %call10, %if.else ]
104  %S.2 = fadd double %S.122, %call8.pn, !dbg !18
105  %inc = add nsw i32 %j.023, 1, !dbg !20
106  %exitcond = icmp eq i32 %j.023, 5999, !dbg !14
107  br i1 %exitcond, label %for.inc12, label %for.body3, !dbg !14
108
109for.inc12:                                        ; preds = %for.inc
110  %S.2.lcssa = phi double [ %S.2, %for.inc ]
111  %inc13 = add nsw i32 %i.025, 1, !dbg !22
112  %exitcond26 = icmp eq i32 %i.025, 9999, !dbg !12
113  br i1 %exitcond26, label %for.end14, label %for.cond1.preheader, !dbg !12
114
115for.end14:                                        ; preds = %for.inc12
116  %S.2.lcssa.lcssa = phi double [ %S.2.lcssa, %for.inc12 ]
117  %call15 = tail call i32 (ptr, ...) @printf(ptr @.str, double %S.2.lcssa.lcssa), !dbg !24
118  ret i32 0, !dbg !25
119}
120
121; Function Attrs: nounwind
122declare i32 @rand() #1
123
124; Function Attrs: nounwind
125declare i32 @printf(ptr nocapture readonly, ...) #1
126
127attributes #0 = {"use-sample-profile"}
128attributes #2 = {"use-sample-profile"}
129
130!llvm.module.flags = !{!0}
131!llvm.ident = !{!1}
132!llvm.dbg.cu = !{!26}
133
134!0 = !{i32 2, !"Debug Info Version", i32 3}
135!1 = !{!"clang version 3.6.0 "}
136!2 = !DILocation(line: 9, column: 3, scope: !3)
137!3 = distinct !DISubprogram(name: "foo", line: 8, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, unit: !26, scopeLine: 8, file: !4, scope: !5, type: !6, retainedNodes: !7)
138!4 = !DIFile(filename: "fnptr.cc", directory: ".")
139!5 = !DIFile(filename: "fnptr.cc", directory: ".")
140!6 = !DISubroutineType(types: !7)
141!7 = !{}
142!8 = !DILocation(line: 9, column: 14, scope: !3)
143!9 = !DILocation(line: 13, column: 3, scope: !10)
144!10 = distinct !DISubprogram(name: "bar", line: 12, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, unit: !26, scopeLine: 12, file: !4, scope: !5, type: !6, retainedNodes: !7)
145!11 = !DILocation(line: 13, column: 14, scope: !10)
146!12 = !DILocation(line: 19, column: 3, scope: !13)
147!13 = distinct !DISubprogram(name: "main", line: 16, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, unit: !26, scopeLine: 16, file: !4, scope: !5, type: !6, retainedNodes: !7)
148!14 = !DILocation(line: 20, column: 5, scope: !13)
149!15 = !DILocation(line: 21, column: 15, scope: !13)
150!16 = !DILocation(line: 22, column: 11, scope: !13)
151!18 = !DILocation(line: 23, column: 14, scope: !13)
152!19 = !DILocation(line: 25, column: 14, scope: !13)
153!20 = !DILocation(line: 20, column: 28, scope: !13)
154!22 = !DILocation(line: 19, column: 26, scope: !13)
155!24 = !DILocation(line: 27, column: 3, scope: !13)
156!25 = !DILocation(line: 28, column: 3, scope: !13)
157!26 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5 ", isOptimized: false, emissionKind: FullDebug, file: !4)
158