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| author | Wei Mi <wmi@google.com> | 2019-01-17 20:48:34 +0000 |
|---|---|---|
| committer | Wei Mi <wmi@google.com> | 2019-01-17 20:48:34 +0000 |
| commit | 3bcccdfe38f28f8d19faa957cd56ed4d03cd40fb (patch) | |
| tree | 21a5f3a7d03365f95cbdf1ead65d549c1f7bf85f /llvm/test/Transforms/SampleProfile/flattened.ll | |
| parent | edd653bc072dcafa5e54c2c91b7cf20343b2664c (diff) | |
| download | bcm5719-llvm-3bcccdfe38f28f8d19faa957cd56ed4d03cd40fb.tar.gz bcm5719-llvm-3bcccdfe38f28f8d19faa957cd56ed4d03cd40fb.zip | |
[SampleFDO] Skip profile reading when flattened profile used in ThinLTO postlink
If the sample profile has no inlining hierachy information included, we call
the sample profile is flattened. For flattened profile, in ThinLTO postlink
phase, SampleProfileLoader's hot function inlining and profile annotation will
do nothing, so it is better to save the effort to read in the profile and run
the sample profile loader pass. It is helpful for reducing compile time when
the flattened profile is huge.
Differential Revision: https://reviews.llvm.org/D54819
llvm-svn: 351476
Diffstat (limited to 'llvm/test/Transforms/SampleProfile/flattened.ll')
| -rw-r--r-- | llvm/test/Transforms/SampleProfile/flattened.ll | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SampleProfile/flattened.ll b/llvm/test/Transforms/SampleProfile/flattened.ll new file mode 100644 index 00000000000..7a1e53b966c --- /dev/null +++ b/llvm/test/Transforms/SampleProfile/flattened.ll @@ -0,0 +1,39 @@ +; Check flattened profile will not be read in thinlto postlink. +; RUN: opt < %s -O2 -flattened-profile-used -pgo-kind=pgo-sample-use-pipeline -profile-file=%S/Inputs/flattened.prof -enable-chr=false -perform-thinlto=true -S | FileCheck %s +; RUN: opt < %s -passes='thinlto<O2>' -pgo-kind=pgo-sample-use-pipeline -profile-file=%S/Inputs/flattened.prof -flattened-profile-used -S | FileCheck %s +; +; Check flattened profile will be read in thinlto prelink. +; RUN: opt < %s -O2 -flattened-profile-used -pgo-kind=pgo-sample-use-pipeline -profile-file=%S/Inputs/flattened.prof -enable-chr=false -prepare-for-thinlto=true -S | FileCheck %s --check-prefix=PRELINK +; RUN: opt < %s -passes='thinlto-pre-link<O2>' -pgo-kind=pgo-sample-use-pipeline -profile-file=%S/Inputs/flattened.prof -flattened-profile-used -S | FileCheck %s --check-prefix=PRELINK +; +; Check flattened profile will be read in non-thinlto mode. +; RUN: opt < %s -O2 -flattened-profile-used -pgo-kind=pgo-sample-use-pipeline -profile-file=%S/Inputs/flattened.prof -enable-chr=false -S | FileCheck %s --check-prefix=NOTHINLTO +; RUN: opt < %s -passes='default<O2>' -pgo-kind=pgo-sample-use-pipeline -profile-file=%S/Inputs/flattened.prof -flattened-profile-used -S | FileCheck %s --check-prefix=NOTHINLTO +; +; CHECK-NOT: !{!"ProfileFormat", !"SampleProfile"} +; PRELINK: !{!"ProfileFormat", !"SampleProfile"} +; NOTHINLTO: !{!"ProfileFormat", !"SampleProfile"} + +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +; Function Attrs: norecurse nounwind readnone uwtable +define dso_local i32 @foo() local_unnamed_addr !dbg !7 { +entry: + ret i32 -1, !dbg !9 +} + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!3, !4, !5} +!llvm.ident = !{!6} + +!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 8.0.0 (trunk 345241)", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2, nameTableKind: None) +!1 = !DIFile(filename: "a.c", directory: "") +!2 = !{} +!3 = !{i32 2, !"Dwarf Version", i32 4} +!4 = !{i32 2, !"Debug Info Version", i32 3} +!5 = !{i32 1, !"wchar_size", i32 4} +!6 = !{!"clang version 8.0.0 (trunk 345241)"} +!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0, retainedNodes: !2) +!8 = !DISubroutineType(types: !2) +!9 = !DILocation(line: 2, column: 3, scope: !7) |
