de40f6d623
Functions are currently processed by the sample profiler loader in a top-down order defined by the static call graph. The order is being adjusted to be a top-down order based on the input context-sensitive profile. One benefit is that the processing order of caller and callee in one SCC would follow the context order in the profile to favor more inlining. Another benefit is that the processing order of caller and callee through an indirect call (which is not on the static call graph) can be honored which in turn allows for more inlining. The profile top-down order for SCC is also extended to support non-CS profiles. Two switches `-mllvm -use-profile-indirect-call-edges` and `-mllvm -use-profile-top-down-order` are being introduced. Reviewed By: wmi Differential Revision: https://reviews.llvm.org/D95988
180 lines
11 KiB
LLVM
180 lines
11 KiB
LLVM
;; Test for different function processing orders affecting inlining in sample profile loader.
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;; There is an SCC _Z5funcAi -> _Z8funcLeafi -> _Z5funcAi in the program.
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;; With -use-profile-top-down-order=0, the top-down processing order of
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;; that SCC is (_Z8funcLeafi, _Z5funcAi), which is determinined based on
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;; the static call graph. With -use-profile-top-down-order=1, call edges
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;; from profile are considered, thus the order becomes (_Z5funcAi, _Z8funcLeafi).
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;; While _Z8funcLeafi is not supposed to be inlined, the outlined entry counts
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;; are affected.
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; RUN: opt < %s -passes=sample-profile -use-profile-top-down-order=0 -sample-profile-file=%S/Inputs/profile-topdown-order.prof -S | FileCheck %s -check-prefix=STATIC
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; RUN: opt < %s -passes=sample-profile -use-profile-top-down-order=1 -sample-profile-file=%S/Inputs/profile-topdown-order.prof -S | FileCheck %s -check-prefix=DYNAMIC
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; STATIC: define dso_local i32 @_Z8funcLeafi{{.*}} !prof ![[#PROF:]]
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; STATIC: ![[#PROF]] = !{!"function_entry_count", i64 21}
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; DYNAMIC: define dso_local i32 @_Z8funcLeafi{{.*}} !prof ![[#PROF:]]
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; DYNAMIC: ![[#PROF]] = !{!"function_entry_count", i64 27}
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@factor = dso_local global i32 3, align 4, !dbg !0
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@fp = dso_local global i32 (i32)* null, align 8
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define dso_local i32 @main() local_unnamed_addr #0 !dbg !18 {
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entry:
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store i32 (i32)* @_Z3fibi, i32 (i32)** @fp, align 8, !dbg !25
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br label %for.body, !dbg !25
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for.cond.cleanup: ; preds = %for.body
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ret i32 %add3, !dbg !27
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for.body: ; preds = %for.body, %entry
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%x.011 = phi i32 [ 300000, %entry ], [ %dec, %for.body ]
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%r.010 = phi i32 [ 0, %entry ], [ %add3, %for.body ]
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%call = tail call i32 @_Z5funcBi(i32 %x.011), !dbg !32
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%add = add nuw nsw i32 %x.011, 1, !dbg !31
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%call1 = tail call i32 @_Z5funcAi(i32 %add), !dbg !28
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%add2 = add i32 %call, %r.010, !dbg !34
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%add3 = add i32 %add2, %call1, !dbg !35
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%dec = add nsw i32 %x.011, -1, !dbg !36
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%cmp = icmp eq i32 %x.011, 0, !dbg !38
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br i1 %cmp, label %for.cond.cleanup, label %for.body, !dbg !25
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}
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define dso_local i32 @_Z5funcAi(i32 %x) local_unnamed_addr #0 !dbg !40 {
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entry:
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%add = add nsw i32 %x, 100000, !dbg !44
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%0 = load i32 (i32)*, i32 (i32)** @fp, align 8
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%call = call i32 %0(i32 8), !dbg !45
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%call1 = tail call i32 @_Z8funcLeafi(i32 %add), !dbg !46
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ret i32 %call, !dbg !46
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}
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; INLINE: define dso_local i32 @_Z8funcLeafi
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; NOINLINE: define dso_local i32 @_Z8funcLeafi
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; ICALL-INLINE: define dso_local i32 @_Z8funcLeafi
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; ICALL-NOINLINE: define dso_local i32 @_Z8funcLeafi
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define dso_local i32 @_Z8funcLeafi(i32 %x) local_unnamed_addr #1 !dbg !54 {
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entry:
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%cmp = icmp sgt i32 %x, 0, !dbg !57
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br i1 %cmp, label %while.body, label %while.cond2.preheader, !dbg !59
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while.cond2.preheader: ; preds = %entry
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%cmp313 = icmp slt i32 %x, 0, !dbg !60
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br i1 %cmp313, label %while.body4, label %if.end, !dbg !63
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while.body: ; preds = %while.body, %entry
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%x.addr.016 = phi i32 [ %sub, %while.body ], [ %x, %entry ]
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%tmp = load volatile i32, i32* @factor, align 4, !dbg !64
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%call = tail call i32 @_Z5funcAi(i32 %tmp), !dbg !67
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%sub = sub nsw i32 %x.addr.016, %call, !dbg !68
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%cmp1 = icmp sgt i32 %sub, 0, !dbg !69
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br i1 %cmp1, label %while.body, label %if.end, !dbg !71
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while.body4: ; preds = %while.body4, %while.cond2.preheader
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%x.addr.114 = phi i32 [ %add, %while.body4 ], [ %x, %while.cond2.preheader ]
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%tmp1 = load volatile i32, i32* @factor, align 4, !dbg !72
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%call5 = tail call i32 @_Z5funcBi(i32 %tmp1), !dbg !74
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%add = add nsw i32 %call5, %x.addr.114, !dbg !75
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%cmp3 = icmp slt i32 %add, 0, !dbg !60
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br i1 %cmp3, label %while.body4, label %if.end, !dbg !63
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if.end: ; preds = %while.body4, %while.body, %while.cond2.preheader
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%x.addr.2 = phi i32 [ 0, %while.cond2.preheader ], [ %sub, %while.body ], [ %add, %while.body4 ]
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ret i32 %x.addr.2, !dbg !76
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}
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define dso_local i32 @_Z5funcBi(i32 %x) local_unnamed_addr #0 !dbg !47 {
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entry:
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%sub = add nsw i32 %x, -100000, !dbg !51
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%call = tail call i32 @_Z8funcLeafi(i32 %sub), !dbg !52
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ret i32 %call, !dbg !53
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}
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define dso_local i32 @_Z3fibi(i32 %x) local_unnamed_addr #1 !dbg !77 {
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entry:
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%sub = add nsw i32 %x, -100000, !dbg !78
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%call = tail call i32 @_Z3foo(i32 %sub), !dbg !78
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ret i32 %sub, !dbg !78
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}
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declare i32 @_Z3foo(i32)
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attributes #0 = { nofree noinline nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "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"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" "use-sample-profile" }
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attributes #1 = { nofree nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "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"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" "use-sample-profile" }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!14, !15, !16}
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!llvm.ident = !{!17}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "factor", scope: !2, file: !3, line: 21, type: !13, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !3, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !5, globals: !12, splitDebugInlining: false, debugInfoForProfiling: true, nameTableKind: None)
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!3 = !DIFile(filename: "merged.cpp", directory: "/local/autofdo")
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!4 = !{}
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!5 = !{!6, !10, !11}
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!6 = !DISubprogram(name: "funcA", linkageName: "_Z5funcAi", scope: !3, file: !3, line: 6, type: !7, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !4)
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!7 = !DISubroutineType(types: !8)
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!8 = !{!9, !9}
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!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!10 = !DISubprogram(name: "funcB", linkageName: "_Z5funcBi", scope: !3, file: !3, line: 7, type: !7, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !4)
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!11 = !DISubprogram(name: "funcLeaf", linkageName: "_Z8funcLeafi", scope: !3, file: !3, line: 22, type: !7, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !4)
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!12 = !{!0}
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!13 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !9)
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!14 = !{i32 7, !"Dwarf Version", i32 4}
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!15 = !{i32 2, !"Debug Info Version", i32 3}
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!16 = !{i32 1, !"wchar_size", i32 4}
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!17 = !{!"clang version 11.0.0"}
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!18 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 11, type: !19, scopeLine: 11, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !21)
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!19 = !DISubroutineType(types: !20)
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!20 = !{!9}
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!21 = !{!22, !23}
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!22 = !DILocalVariable(name: "r", scope: !18, file: !3, line: 12, type: !9)
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!23 = !DILocalVariable(name: "x", scope: !24, file: !3, line: 13, type: !9)
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!24 = distinct !DILexicalBlock(scope: !18, file: !3, line: 13, column: 3)
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!25 = !DILocation(line: 13, column: 3, scope: !26)
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!26 = !DILexicalBlockFile(scope: !24, file: !3, discriminator: 2)
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!27 = !DILocation(line: 17, column: 3, scope: !18)
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!28 = !DILocation(line: 14, column: 10, scope: !29)
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!29 = distinct !DILexicalBlock(scope: !30, file: !3, line: 13, column: 37)
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!30 = distinct !DILexicalBlock(scope: !24, file: !3, line: 13, column: 3)
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!31 = !DILocation(line: 14, column: 29, scope: !29)
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!32 = !DILocation(line: 14, column: 21, scope: !33)
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!33 = !DILexicalBlockFile(scope: !29, file: !3, discriminator: 2)
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!34 = !DILocation(line: 14, column: 19, scope: !29)
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!35 = !DILocation(line: 14, column: 7, scope: !29)
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!36 = !DILocation(line: 13, column: 33, scope: !37)
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!37 = !DILexicalBlockFile(scope: !30, file: !3, discriminator: 6)
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!38 = !DILocation(line: 13, column: 26, scope: !39)
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!39 = !DILexicalBlockFile(scope: !30, file: !3, discriminator: 2)
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!40 = distinct !DISubprogram(name: "funcA", linkageName: "_Z5funcAi", scope: !3, file: !3, line: 26, type: !7, scopeLine: 26, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2)
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!44 = !DILocation(line: 26, column: 22, scope: !40)
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!45 = !DILocation(line: 28, column: 11, scope: !40)
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!46 = !DILocation(line: 27, column: 3, scope: !40)
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!47 = distinct !DISubprogram(name: "funcB", linkageName: "_Z5funcBi", scope: !3, file: !3, line: 32, type: !7, scopeLine: 32, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2)
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!51 = !DILocation(line: 33, column: 22, scope: !47)
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!52 = !DILocation(line: 33, column: 11, scope: !47)
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!53 = !DILocation(line: 35, column: 3, scope: !47)
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!54 = distinct !DISubprogram(name: "funcLeaf", linkageName: "_Z8funcLeafi", scope: !3, file: !3, line: 48, type: !7, scopeLine: 48, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2)
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!57 = !DILocation(line: 49, column: 9, scope: !58)
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!58 = distinct !DILexicalBlock(scope: !54, file: !3, line: 49, column: 7)
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!59 = !DILocation(line: 49, column: 7, scope: !54)
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!60 = !DILocation(line: 58, column: 14, scope: !61)
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!61 = !DILexicalBlockFile(scope: !62, file: !3, discriminator: 2)
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!62 = distinct !DILexicalBlock(scope: !58, file: !3, line: 56, column: 8)
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!63 = !DILocation(line: 58, column: 5, scope: !61)
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!64 = !DILocation(line: 52, column: 16, scope: !65)
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!65 = distinct !DILexicalBlock(scope: !66, file: !3, line: 51, column: 19)
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!66 = distinct !DILexicalBlock(scope: !58, file: !3, line: 49, column: 14)
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!67 = !DILocation(line: 52, column: 12, scope: !65)
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!68 = !DILocation(line: 52, column: 9, scope: !65)
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!69 = !DILocation(line: 51, column: 14, scope: !70)
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!70 = !DILexicalBlockFile(scope: !66, file: !3, discriminator: 2)
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!71 = !DILocation(line: 51, column: 5, scope: !70)
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!72 = !DILocation(line: 59, column: 16, scope: !73)
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!73 = distinct !DILexicalBlock(scope: !62, file: !3, line: 58, column: 19)
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!74 = !DILocation(line: 59, column: 12, scope: !73)
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!75 = !DILocation(line: 59, column: 9, scope: !73)
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!76 = !DILocation(line: 63, column: 3, scope: !54)
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!77 = distinct !DISubprogram(name: "funcB", linkageName: "_Z3fibi", scope: !3, file: !3, line: 32, type: !7, scopeLine: 32, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2)
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!78 = !DILocation(line: 33, column: 22, scope: !77)
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