f28ee1a2b3
With prelink inlining, pseudo probes with same ID can come from different inline contexts. Such probes should not share samples and their factors should be fixed up separately. I'm seeing 0.3% speedup for SPEC2017 overall. Benchmark 631.deepsjeng_s benefits the most, about 4%. Reviewed By: wenlei, wmi Differential Revision: https://reviews.llvm.org/D102429
80 lines
4.1 KiB
LLVM
80 lines
4.1 KiB
LLVM
; RUN: opt < %s -passes='pseudo-probe-update' -S | FileCheck %s
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declare i32 @f1()
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declare i32 @f2()
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declare void @f3()
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define i32 @foo(i1 %cond, i1 %cond2) !dbg !4 !prof !10 {
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 1, i32 0, i64 -1)
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br i1 %cond, label %T1, label %Merge, !prof !11
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T1: ; preds = %0
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%v1 = call i32 @f1(), !prof !12
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%cond3 = icmp eq i32 %v1, 412
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 2, i32 0, i64 -1)
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;; The distribution factor -8513881372706734080 stands for 53.85%, whic is from 7/6+7.
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; CHECK: call void @llvm.pseudoprobe(i64 [[#GUID:]], i64 4, i32 0, i64 -8513881372706734080)
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 4, i32 0, i64 -1), !dbg !13
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;; Probe 7 has two copies, since they don't share the same inline context, they are not
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;; considered sharing samples, thus their distribution factors are not fixed up.
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; CHECK: call void @llvm.pseudoprobe(i64 [[#GUID]], i64 7, i32 0, i64 -1)
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 7, i32 0, i64 -1), !dbg !13
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;; Similar to Probe 7, one copy of Probe 8 doesn't have inline context.
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; CHECK: call void @llvm.pseudoprobe(i64 [[#GUID]], i64 8, i32 0, i64 -1)
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 8, i32 0, i64 -1), !dbg !13
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br i1 %cond3, label %T2, label %F2, !prof !11
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Merge: ; preds = %0
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%v2 = call i32 @f2(), !prof !12
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 3, i32 0, i64 -1)
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;; The distribution factor 8513881922462547968 stands for 46.25%, which is from 6/6+7.
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; CHECK: call void @llvm.pseudoprobe(i64 [[#GUID]], i64 4, i32 0, i64 8513881922462547968)
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 4, i32 0, i64 8513881922462547968), !dbg !13
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; CHECK: call void @llvm.pseudoprobe(i64 [[#GUID]], i64 7, i32 0, i64 -1)
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 7, i32 0, i64 -1), !dbg !18
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; CHECK: call void @llvm.pseudoprobe(i64 [[#GUID]], i64 8, i32 0, i64 -1)
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 8, i32 0, i64 -1), !dbg !19
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br i1 %cond2, label %T2, label %F2, !prof !11
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T2: ; preds = %Merge, %T1
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%B1 = phi i32 [ %v1, %T1 ], [ %v2, %Merge ]
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call void @f3(), !prof !12
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 5, i32 0, i64 -1)
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ret i32 %B1
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F2: ; preds = %Merge, %T1
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%B2 = phi i32 [ %v1, %T1 ], [ %v2, %Merge ]
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call void @llvm.pseudoprobe(i64 6699318081062747564, i64 6, i32 0, i64 -1)
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ret i32 %B2
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}
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; Function Attrs: inaccessiblememonly nounwind willreturn
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declare void @llvm.pseudoprobe(i64, i64, i32, i64) #0
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attributes #0 = { inaccessiblememonly nounwind willreturn }
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!llvm.module.flags = !{!0, !1}
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!llvm.pseudo_probe_desc = !{!2, !3}
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!0 = !{i32 7, !"Dwarf Version", i32 4}
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!1 = !{i32 2, !"Debug Info Version", i32 3}
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!2 = !{i64 6699318081062747564, i64 281479271677951, !"foo", null}
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!3 = !{i64 6468398850841090686, i64 138828622701, !"zen", null}
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!4 = distinct !DISubprogram(name: "foo", scope: !5, file: !5, line: 9, type: !6, scopeLine: 9, spFlags: DISPFlagDefinition, unit: !9)
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!5 = !DIFile(filename: "test.cpp", directory: "test")
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!6 = !DISubroutineType(types: !7)
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!7 = !{!8, !8}
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!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!9 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !5, isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug)
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!10 = !{!"function_entry_count", i64 14}
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!11 = !{!"branch_weights", i32 8, i32 7}
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!12 = !{!"branch_weights", i32 7}
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!13 = !DILocation(line: 39, column: 9, scope: !14, inlinedAt: !16)
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!14 = distinct !DILexicalBlock(scope: !15, file: !5, line: 39, column: 7)
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!15 = distinct !DISubprogram(name: "zen", scope: !5, file: !5, line: 37, type: !6, scopeLine: 38, spFlags: DISPFlagDefinition, unit: !9)
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!16 = distinct !DILocation(line: 10, column: 11, scope: !17)
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!17 = !DILexicalBlockFile(scope: !4, file: !5, discriminator: 186646551)
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!18 = !DILocation(line: 53, column: 3, scope: !15, inlinedAt: !19)
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!19 = !DILocation(line: 12, column: 3, scope: !4) |