xref: /llvm-project/llvm/test/Transforms/SampleProfile/misexpect-zero.ll (revision 0d2271bb446d1a8cc7cbfbcd28827c305916d8ec) 
1; Ensure MisExpect does not crash when given branches with zero weights
2
3; RUN: opt < %s -passes="sample-profile" -sample-profile-file=%S/Inputs/misexpect.prof -pgo-warn-misexpect -S 2>&1  | FileCheck %s
4
5define i32 @main() #0 !dbg !36 {
6 ; CHECK-LABEL: @main(
7; CHECK-NEXT: for.cond:
8; CHECK-NEXT: %0 = load i32, ptr null, align 4, !dbg !44
9; CHECK-NEXT: br i1 false, label %for.body, label %for.end, !prof !49
10; CHECK: for.body:
11; CHECK-NEXT: ret i32 0
12; CHECK: for.end:
13; CHECK-NEXT: ret i32 0
14; NOT: warning:
15for.cond:
16  %0 = load i32, ptr null, align 4, !dbg !43
17  br i1 false, label %for.body, label %for.end, !prof !48
18
19for.body:                                         ; preds = %for.cond
20  ret i32 0
21
22for.end:                                          ; preds = %for.cond
23  ret i32 0
24}
25
26; Function Attrs: nocallback nofree nosync nounwind readnone speculatable willreturn
27declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
28
29attributes #0 = { "use-sample-profile" }
30attributes #1 = { nocallback nofree nosync nounwind readnone speculatable willreturn }
31
32!llvm.dbg.cu = !{!0}
33!llvm.module.flags = !{!5, !6, !7}
34
35!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)
36!1 = !DIFile(filename: "test.cc", directory: "/ssd/llvm_commit")
37!2 = !{}
38!3 = !{!4}
39!4 = !DIBasicType(name: "double", size: 64, align: 64, encoding: DW_ATE_float)
40!5 = !{i32 2, !"Dwarf Version", i32 4}
41!6 = !{i32 2, !"Debug Info Version", i32 3}
42!7 = !{i32 1, !"ProfileSummary", !8}
43!8 = !{!9, !10, !11, !12, !13, !14, !15, !16, !17, !18}
44!9 = !{!"ProfileFormat", !"SampleProfile"}
45!10 = !{!"TotalCount", i64 0}
46!11 = !{!"MaxCount", i64 0}
47!12 = !{!"MaxInternalCount", i64 0}
48!13 = !{!"MaxFunctionCount", i64 0}
49!14 = !{!"NumCounts", i64 9}
50!15 = !{!"NumFunctions", i64 1}
51!16 = !{!"IsPartialProfile", i64 0}
52!17 = !{!"PartialProfileRatio", double 0.000000e+00}
53!18 = !{!"DetailedSummary", !19}
54!19 = !{!20, !21, !22, !23, !24, !25, !26, !27, !28, !29, !30, !31, !32, !33, !34, !35}
55!20 = !{i32 10000, i64 0, i32 0}
56!21 = !{i32 100000, i64 0, i32 0}
57!22 = !{i32 200000, i64 0, i32 0}
58!23 = !{i32 300000, i64 0, i32 0}
59!24 = !{i32 400000, i64 0, i32 0}
60!25 = !{i32 500000, i64 0, i32 0}
61!26 = !{i32 600000, i64 0, i32 0}
62!27 = !{i32 700000, i64 0, i32 0}
63!28 = !{i32 800000, i64 0, i32 0}
64!29 = !{i32 900000, i64 0, i32 0}
65!30 = !{i32 950000, i64 0, i32 0}
66!31 = !{i32 990000, i64 0, i32 0}
67!32 = !{i32 999000, i64 0, i32 0}
68!33 = !{i32 999900, i64 0, i32 0}
69!34 = !{i32 999990, i64 0, i32 0}
70!35 = !{i32 999999, i64 0, i32 0}
71!36 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !37, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
72!37 = !DISubroutineType(types: !38)
73!38 = !{!39, !39, !40}
74!39 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
75!40 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !41, size: 64, align: 64)
76!41 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !42, size: 64, align: 64)
77!42 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
78!43 = !DILocation(line: 11, column: 22, scope: !44)
79!44 = distinct !DILexicalBlock(scope: !45, file: !1, line: 11, column: 6)
80!45 = distinct !DILexicalBlock(scope: !46, file: !1, line: 11, column: 6)
81!46 = distinct !DILexicalBlock(scope: !47, file: !1, line: 9, column: 21)
82!47 = distinct !DILexicalBlock(scope: !36, file: !1, line: 9, column: 8)
83; These branch weights shouldn't be removed by these passes
84; CHECK: !{{[0-9]+}} = !{!"branch_weights", i32 0, i32 0}
85!48 = !{!"branch_weights", i32 0, i32 0}
86