1 ; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/branch.prof | opt -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
2 ; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/branch.prof -overwrite-existing-weights=1 | opt -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s --check-prefix=OVW
4 ; Original C++ code for this test case:
9 ; int main(int argc, char *argv[]) {
13 ; int limit = atoi(argv[1]);
15 ; double s = 23.041968 * atoi(argv[2]);
16 ; for (int u = 0; u < limit; u++) {
18 ; s = x + 3.049 + (double)u;
19 ; s -= s + 3.94 / x * 0.32;
23 ; result = atoi(argv[2]);
25 ; printf("result is %lf\n", result);
29 @.str = private unnamed_addr constant [15 x i8] c"result is %lf\0A\00", align 1
31 ; Function Attrs: uwtable
32 define i32 @main(i32 %argc, ptr %argv) #0 !dbg !6 {
33 ; CHECK: Printing analysis {{.*}} for function 'main':
36 %retval = alloca i32, align 4
37 %argc.addr = alloca i32, align 4
38 %argv.addr = alloca ptr, align 8
39 %result = alloca double, align 8
40 %limit = alloca i32, align 4
41 %s = alloca double, align 8
42 %u = alloca i32, align 4
43 %x = alloca double, align 8
44 store i32 0, ptr %retval, align 4
45 store i32 %argc, ptr %argc.addr, align 4
46 call void @llvm.dbg.declare(metadata ptr %argc.addr, metadata !16, metadata !17), !dbg !18
47 store ptr %argv, ptr %argv.addr, align 8
48 call void @llvm.dbg.declare(metadata ptr %argv.addr, metadata !19, metadata !17), !dbg !20
49 %0 = load i32, ptr %argc.addr, align 4, !dbg !21
50 %cmp = icmp slt i32 %0, 2, !dbg !23
51 br i1 %cmp, label %if.then, label %if.end, !dbg !24
52 ; CHECK: edge %entry -> %if.then probability is 0x4ccf6b16 / 0x80000000 = 60.01%
53 ; CHECK: edge %entry -> %if.end probability is 0x333094ea / 0x80000000 = 39.99%
55 if.then: ; preds = %entry
56 store i32 1, ptr %retval, align 4, !dbg !25
57 br label %return, !dbg !25
59 if.end: ; preds = %entry
60 call void @llvm.dbg.declare(metadata ptr %result, metadata !26, metadata !17), !dbg !27
61 call void @llvm.dbg.declare(metadata ptr %limit, metadata !28, metadata !17), !dbg !29
62 %1 = load ptr, ptr %argv.addr, align 8, !dbg !30
63 %arrayidx = getelementptr inbounds ptr, ptr %1, i64 1, !dbg !30
64 %2 = load ptr, ptr %arrayidx, align 8, !dbg !30
65 %call = call i32 @atoi(ptr %2) #4, !dbg !31
66 store i32 %call, ptr %limit, align 4, !dbg !29
67 %3 = load i32, ptr %limit, align 4, !dbg !32
68 %cmp1 = icmp sgt i32 %3, 100, !dbg !34
69 br i1 %cmp1, label %if.then.2, label %if.else, !dbg !35
70 ; CHECK: edge %if.end -> %if.then.2 probability is 0x6652c748 / 0x80000000 = 79.94%
71 ; CHECK: edge %if.end -> %if.else probability is 0x19ad38b8 / 0x80000000 = 20.06%
73 if.then.2: ; preds = %if.end
74 call void @llvm.dbg.declare(metadata ptr %s, metadata !36, metadata !17), !dbg !38
75 %4 = load ptr, ptr %argv.addr, align 8, !dbg !39
76 %arrayidx3 = getelementptr inbounds ptr, ptr %4, i64 2, !dbg !39
77 %5 = load ptr, ptr %arrayidx3, align 8, !dbg !39
78 %call4 = call i32 @atoi(ptr %5) #4, !dbg !40
79 %conv = sitofp i32 %call4 to double, !dbg !40
80 %mul = fmul double 0x40370ABE6A337A81, %conv, !dbg !41
81 store double %mul, ptr %s, align 8, !dbg !38
82 call void @llvm.dbg.declare(metadata ptr %u, metadata !42, metadata !17), !dbg !44
83 store i32 0, ptr %u, align 4, !dbg !44
84 br label %for.cond, !dbg !45
86 for.cond: ; preds = %for.inc, %if.then.2
87 %6 = load i32, ptr %u, align 4, !dbg !46
88 %7 = load i32, ptr %limit, align 4, !dbg !48
89 %cmp5 = icmp slt i32 %6, %7, !dbg !49
90 br i1 %cmp5, label %for.body, label %for.end, !dbg !50, !prof !80
91 ; CHECK: edge %for.cond -> %for.body probability is 0x73333333 / 0x80000000 = 90.00%
92 ; CHECK: edge %for.cond -> %for.end probability is 0x0ccccccd / 0x80000000 = 10.00%
93 ; OVW: edge %for.cond -> %for.body probability is 0x76b3f3be / 0x80000000 = 92.74%
94 ; OVW: edge %for.cond -> %for.end probability is 0x094c0c42 / 0x80000000 = 7.26%
96 for.body: ; preds = %for.cond
97 call void @llvm.dbg.declare(metadata ptr %x, metadata !51, metadata !17), !dbg !53
98 %8 = load double, ptr %s, align 8, !dbg !54
99 store double %8, ptr %x, align 8, !dbg !53
100 %9 = load double, ptr %x, align 8, !dbg !55
101 %add = fadd double %9, 3.049000e+00, !dbg !56
102 %10 = load i32, ptr %u, align 4, !dbg !57
103 %conv6 = sitofp i32 %10 to double, !dbg !57
104 %add7 = fadd double %add, %conv6, !dbg !58
105 store double %add7, ptr %s, align 8, !dbg !59
106 %11 = load double, ptr %s, align 8, !dbg !60
107 %12 = load double, ptr %x, align 8, !dbg !61
108 %div = fdiv double 3.940000e+00, %12, !dbg !62
109 %mul8 = fmul double %div, 3.200000e-01, !dbg !63
110 %add9 = fadd double %11, %mul8, !dbg !64
111 %13 = load double, ptr %s, align 8, !dbg !65
112 %sub = fsub double %13, %add9, !dbg !65
113 store double %sub, ptr %s, align 8, !dbg !65
114 br label %for.inc, !dbg !66
116 for.inc: ; preds = %for.body
117 %14 = load i32, ptr %u, align 4, !dbg !67
118 %inc = add nsw i32 %14, 1, !dbg !67
119 store i32 %inc, ptr %u, align 4, !dbg !67
120 br label %for.cond, !dbg !68
122 for.end: ; preds = %for.cond
123 %15 = load double, ptr %s, align 8, !dbg !69
124 store double %15, ptr %result, align 8, !dbg !70
125 br label %if.end.13, !dbg !71
127 if.else: ; preds = %if.end
128 %16 = load ptr, ptr %argv.addr, align 8, !dbg !72
129 %arrayidx10 = getelementptr inbounds ptr, ptr %16, i64 2, !dbg !72
130 %17 = load ptr, ptr %arrayidx10, align 8, !dbg !72
131 %call11 = call i32 @atoi(ptr %17) #4, !dbg !74
132 %conv12 = sitofp i32 %call11 to double, !dbg !74
133 store double %conv12, ptr %result, align 8, !dbg !75
136 if.end.13: ; preds = %if.else, %for.end
137 %18 = load double, ptr %result, align 8, !dbg !76
138 %call14 = call i32 (ptr, ...) @printf(ptr @.str, double %18), !dbg !77
139 store i32 0, ptr %retval, align 4, !dbg !78
140 br label %return, !dbg !78
142 return: ; preds = %if.end.13, %if.then
143 %19 = load i32, ptr %retval, align 4, !dbg !79
144 ret i32 %19, !dbg !79
147 ; Function Attrs: nounwind readnone
148 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
150 ; Function Attrs: nounwind readonly
151 declare i32 @atoi(ptr) #2
153 declare i32 @printf(ptr, ...) #3
155 attributes #0 = { uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" "use-sample-profile" }
156 attributes #1 = { nounwind readnone }
157 attributes #2 = { nounwind readonly "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
158 attributes #3 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
159 attributes #4 = { nounwind readonly }
162 !llvm.module.flags = !{!13, !14}
165 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 248211) (llvm/trunk 248217)", isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug, enums: !2, retainedTypes: !3)
166 !1 = !DIFile(filename: "test.cc", directory: "/ssd/llvm_commit")
169 !4 = !DIBasicType(name: "double", size: 64, align: 64, encoding: DW_ATE_float)
170 !6 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !7, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
171 !7 = !DISubroutineType(types: !8)
173 !9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
174 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64, align: 64)
175 !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64, align: 64)
176 !12 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
177 !13 = !{i32 2, !"Dwarf Version", i32 4}
178 !14 = !{i32 2, !"Debug Info Version", i32 3}
179 !15 = !{!"clang version 3.8.0 (trunk 248211) (llvm/trunk 248217)"}
180 !16 = !DILocalVariable(name: "argc", arg: 1, scope: !6, file: !1, line: 4, type: !9)
181 !17 = !DIExpression()
182 !18 = !DILocation(line: 4, column: 15, scope: !6)
183 !19 = !DILocalVariable(name: "argv", arg: 2, scope: !6, file: !1, line: 4, type: !10)
184 !20 = !DILocation(line: 4, column: 27, scope: !6)
185 !21 = !DILocation(line: 5, column: 8, scope: !22)
186 !22 = distinct !DILexicalBlock(scope: !6, file: !1, line: 5, column: 8)
187 !23 = !DILocation(line: 5, column: 13, scope: !22)
188 !24 = !DILocation(line: 5, column: 8, scope: !6)
189 !25 = !DILocation(line: 6, column: 6, scope: !22)
190 !26 = !DILocalVariable(name: "result", scope: !6, file: !1, line: 7, type: !4)
191 !27 = !DILocation(line: 7, column: 11, scope: !6)
192 !28 = !DILocalVariable(name: "limit", scope: !6, file: !1, line: 8, type: !9)
193 !29 = !DILocation(line: 8, column: 8, scope: !6)
194 !30 = !DILocation(line: 8, column: 21, scope: !6)
195 !31 = !DILocation(line: 8, column: 16, scope: !6)
196 !32 = !DILocation(line: 9, column: 8, scope: !33)
197 !33 = distinct !DILexicalBlock(scope: !6, file: !1, line: 9, column: 8)
198 !34 = !DILocation(line: 9, column: 14, scope: !33)
199 !35 = !DILocation(line: 9, column: 8, scope: !6)
200 !36 = !DILocalVariable(name: "s", scope: !37, file: !1, line: 10, type: !4)
201 !37 = distinct !DILexicalBlock(scope: !33, file: !1, line: 9, column: 21)
202 !38 = !DILocation(line: 10, column: 13, scope: !37)
203 !39 = !DILocation(line: 10, column: 34, scope: !37)
204 !40 = !DILocation(line: 10, column: 29, scope: !37)
205 !41 = !DILocation(line: 10, column: 27, scope: !37)
206 !42 = !DILocalVariable(name: "u", scope: !43, file: !1, line: 11, type: !9)
207 !43 = distinct !DILexicalBlock(scope: !37, file: !1, line: 11, column: 6)
208 !44 = !DILocation(line: 11, column: 15, scope: !43)
209 !45 = !DILocation(line: 11, column: 11, scope: !43)
210 !46 = !DILocation(line: 11, column: 22, scope: !47)
211 !47 = distinct !DILexicalBlock(scope: !43, file: !1, line: 11, column: 6)
212 !48 = !DILocation(line: 11, column: 26, scope: !47)
213 !49 = !DILocation(line: 11, column: 24, scope: !47)
214 !50 = !DILocation(line: 11, column: 6, scope: !43)
215 !51 = !DILocalVariable(name: "x", scope: !52, file: !1, line: 12, type: !4)
216 !52 = distinct !DILexicalBlock(scope: !47, file: !1, line: 11, column: 38)
217 !53 = !DILocation(line: 12, column: 15, scope: !52)
218 !54 = !DILocation(line: 12, column: 19, scope: !52)
219 !55 = !DILocation(line: 13, column: 12, scope: !52)
220 !56 = !DILocation(line: 13, column: 14, scope: !52)
221 !57 = !DILocation(line: 13, column: 32, scope: !52)
222 !58 = !DILocation(line: 13, column: 22, scope: !52)
223 !59 = !DILocation(line: 13, column: 10, scope: !52)
224 !60 = !DILocation(line: 14, column: 13, scope: !52)
225 !61 = !DILocation(line: 14, column: 24, scope: !52)
226 !62 = !DILocation(line: 14, column: 22, scope: !52)
227 !63 = !DILocation(line: 14, column: 26, scope: !52)
228 !64 = !DILocation(line: 14, column: 15, scope: !52)
229 !65 = !DILocation(line: 14, column: 10, scope: !52)
230 !66 = !DILocation(line: 15, column: 6, scope: !52)
231 !67 = !DILocation(line: 11, column: 34, scope: !47)
232 !68 = !DILocation(line: 11, column: 6, scope: !47)
233 !69 = !DILocation(line: 16, column: 15, scope: !37)
234 !70 = !DILocation(line: 16, column: 13, scope: !37)
235 !71 = !DILocation(line: 17, column: 4, scope: !37)
236 !72 = !DILocation(line: 18, column: 20, scope: !73)
237 !73 = distinct !DILexicalBlock(scope: !33, file: !1, line: 17, column: 11)
238 !74 = !DILocation(line: 18, column: 15, scope: !73)
239 !75 = !DILocation(line: 18, column: 13, scope: !73)
240 !76 = !DILocation(line: 20, column: 30, scope: !6)
241 !77 = !DILocation(line: 20, column: 4, scope: !6)
242 !78 = !DILocation(line: 21, column: 4, scope: !6)
243 !79 = !DILocation(line: 22, column: 2, scope: !6)
244 !80 = !{!"branch_weights", i32 90, i32 10}