derek.holloway
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99 lines
4.5 KiB
LLVM
99 lines
4.5 KiB
LLVM
; Test that functionMatchesProfileHelper flattens profiles after loading.
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;
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; When functionMatchesProfileHelper loads a top-level profile via
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; Reader.read(), it must flatten the profile so inlined callees get their
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; own entries in FlattenedProfiles. Without flattening, a renamed callee
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; that only exists as an inlined entry (not top-level) cannot be matched
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; because its profile is undiscoverable.
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;
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; Setup:
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; - main calls foo_new (renamed from foo_old, matched by checksum)
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; - foo_new calls bar_new (renamed from bar_old)
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; - bar_old exists ONLY as an inlined callee in foo_old's profile
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; - Non-C++ names so basename matching fails; matching uses checksums
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; - Without flattening: bar_old has no flattened entry, bar_new unmatched
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; - With flattening: bar_old gets flattened, bar_new matched by checksum
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; REQUIRES: x86_64-linux
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; REQUIRES: asserts
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; RUN: llvm-profdata merge --sample --extbinary %S/Inputs/pseudo-probe-stale-profile-flatten-helper.prof -o %t.prof
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; RUN: opt < %s -passes=sample-profile -sample-profile-file=%t.prof --salvage-stale-profile --salvage-unused-profile -S --debug-only=sample-profile,sample-profile-matcher,sample-profile-impl --min-func-count-for-cg-matching=0 --min-call-count-for-cg-matching=0 2>&1 | FileCheck %s
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; Verify orphan functions are found.
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; CHECK: Function bar_new is not in profile or profile symbol list.
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; CHECK: Function foo_new is not in profile or profile symbol list.
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; Verify foo_new is matched to foo_old by checksum via CG matching.
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; CHECK: The checksums for foo_new(IR) and foo_old(Profile) match.
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; CHECK: Function:foo_new matches profile:foo_old
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; Verify bar_new is matched to bar_old by checksum. This requires
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; foo_old's profile to be flattened after loading so bar_old gets a
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; flattened entry discoverable by getFlattenedSamplesFor.
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; CHECK: The checksums for bar_new(IR) and bar_old(Profile) match.
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; CHECK: Function:bar_new matches profile:bar_old
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; Verify stale profile matching runs for bar_new (would not happen
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; without flattening because bar_old's profile would be unavailable).
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; CHECK: Run stale profile matching for bar_new
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @bar_new() #0 !dbg !20 {
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entry:
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call void @llvm.pseudoprobe(i64 8236371237083957767, i64 1, i32 0, i64 -1), !dbg !23
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ret void, !dbg !24
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}
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define void @foo_new() #0 !dbg !11 {
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entry:
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call void @llvm.pseudoprobe(i64 -837213161392124280, i64 1, i32 0, i64 -1), !dbg !14
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call void @bar_new(), !dbg !40
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ret void, !dbg !17
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}
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define i32 @main() #0 !dbg !30 {
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entry:
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call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 1, i32 0, i64 -1), !dbg !33
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call void @foo_new(), !dbg !42
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ret i32 0, !dbg !36
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}
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declare void @llvm.pseudoprobe(i64, i64, i32, i64)
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attributes #0 = { noinline nounwind "use-sample-profile" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!llvm.pseudo_probe_desc = !{!9, !10, !29}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug, nameTableKind: None)
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!1 = !DIFile(filename: "test.cpp", directory: "/tmp")
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!2 = !{i32 2, !"Debug Info Version", i32 3}
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!3 = !{i32 7, !"uwtable", i32 2}
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!9 = !{i64 -837213161392124280, i64 222222, !"foo_new"}
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!10 = !{i64 8236371237083957767, i64 333333, !"bar_new"}
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!29 = !{i64 -2624081020897602054, i64 111111, !"main"}
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!11 = distinct !DISubprogram(name: "foo_new", linkageName: "foo_new", scope: !1, file: !1, line: 3, type: !12, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0)
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!12 = !DISubroutineType(types: !13)
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!13 = !{}
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!14 = !DILocation(line: 4, scope: !11)
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!17 = !DILocation(line: 6, scope: !11)
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!20 = distinct !DISubprogram(name: "bar_new", linkageName: "bar_new", scope: !1, file: !1, line: 10, type: !12, scopeLine: 10, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0)
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!23 = !DILocation(line: 11, scope: !20)
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!24 = !DILocation(line: 12, scope: !20)
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!30 = distinct !DISubprogram(name: "main", linkageName: "main", scope: !1, file: !1, line: 20, type: !12, scopeLine: 20, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0)
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!33 = !DILocation(line: 21, scope: !30)
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!36 = !DILocation(line: 24, scope: !30)
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; Call probe discriminators: (ProbeIndex << 3) | (100 << 19) | (2 << 26) | 0x7
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!41 = !DILexicalBlockFile(scope: !30, file: !1, discriminator: 186646575)
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!42 = !DILocation(line: 23, scope: !41)
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!39 = !DILexicalBlockFile(scope: !11, file: !1, discriminator: 186646559)
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!40 = !DILocation(line: 5, scope: !39)
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