93b74f7178
`TotalRootEntryCount` captures how many times that root was entered - regardless if a profile was also collected or not (profile collection for a given root happens on only one thread at a time). We don't do this in compiler_rt because the goal there is to flush out the data as fast as possible, so traversing and multiplying vectors is punted to the profile user. We really just need to do this when flattening the profile so that the values across roots and flat profiles match. We could do it earlier, too - like when loading the profile - but it seems beneficial (at least for debugging) to keep the counter values the same as the loaded ones. We can revisit this later.
115 lines
3.5 KiB
LLVM
115 lines
3.5 KiB
LLVM
; REQUIRES: x86_64-linux
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;
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; RUN: rm -rf %t
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; RUN: split-file %s %t
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;
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; Test that the GUID metadata survives through thinlink.
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; Also test that the flattener works correctly. f2 is called in 2 places, with
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; different counter values, and we expect resulting flat profile to be the sum
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; (of values at the same index).
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;
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; RUN: llvm-ctxprof-util fromYAML --input=%t/profile.yaml --output=%t/profile.ctxprofdata
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;
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; RUN: opt -module-summary -passes='thinlto-pre-link<O2>' -use-ctx-profile=%t/profile.ctxprofdata -o %t/m1.bc %t/m1.ll
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; RUN: opt -module-summary -passes='thinlto-pre-link<O2>' -use-ctx-profile=%t/profile.ctxprofdata -o %t/m2.bc %t/m2.ll
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;
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; RUN: rm -rf %t/postlink
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; RUN: mkdir %t/postlink
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;
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;
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; RUN: llvm-lto2 run %t/m1.bc %t/m2.bc -o %t/ -thinlto-distributed-indexes \
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; RUN: -use-ctx-profile=%t/profile.ctxprofdata \
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; RUN: -r %t/m1.bc,f1,plx \
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; RUN: -r %t/m1.bc,f3,plx \
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; RUN: -r %t/m2.bc,f1 \
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; RUN: -r %t/m2.bc,f3 \
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; RUN: -r %t/m2.bc,entrypoint,plx
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; RUN: opt --passes='function-import,require<ctx-prof-analysis>,print<ctx-prof-analysis>' -ctx-profile-printer-level=everything \
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; RUN: -summary-file=%t/m2.bc.thinlto.bc -use-ctx-profile=%t/profile.ctxprofdata %t/m2.bc \
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; RUN: -S -o %t/m2.post.ll 2> %t/profile.txt
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; RUN: diff %t/expected.txt %t/profile.txt
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;--- m1.ll
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-linux-gnu"
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source_filename = "random_path/m1.cc"
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define private void @f2() #0 !guid !0 {
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ret void
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}
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define void @f1() #0 {
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call void @f2()
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ret void
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}
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define void @f3() #0 {
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call void @f2()
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ret void
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}
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attributes #0 = { noinline }
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!0 = !{ i64 3087265239403591524 }
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;--- m2.ll
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-linux-gnu"
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source_filename = "random_path/m2.cc"
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declare void @f1()
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declare void @f3()
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define void @entrypoint() {
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call void @f1()
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call void @f3()
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ret void
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}
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;--- profile.yaml
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Contexts:
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- Guid: 10507721908651011566
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TotalRootEntryCount: 10
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Counters: [1]
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Callsites: -
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- Guid: 2072045998141807037
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Counters: [7]
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Callsites: -
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- Guid: 3087265239403591524
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Counters: [10, 7]
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-
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- Guid: 4197650231481825559
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Counters: [2]
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Callsites: -
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- Guid: 3087265239403591524
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Counters: [1, 2]
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;--- expected.txt
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Function Info:
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2072045998141807037 : f1. MaxCounterID: 1. MaxCallsiteID: 1
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3087265239403591524 : f2.llvm.0. MaxCounterID: 1. MaxCallsiteID: 0
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4197650231481825559 : f3. MaxCounterID: 1. MaxCallsiteID: 1
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10507721908651011566 : entrypoint. MaxCounterID: 1. MaxCallsiteID: 2
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Current Profile:
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Contexts:
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- Guid: 10507721908651011566
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TotalRootEntryCount: 10
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Counters: [ 1 ]
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Callsites:
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- - Guid: 2072045998141807037
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Counters: [ 7 ]
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Callsites:
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- - Guid: 3087265239403591524
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Counters: [ 10, 7 ]
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- - Guid: 4197650231481825559
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Counters: [ 2 ]
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Callsites:
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- - Guid: 3087265239403591524
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Counters: [ 1, 2 ]
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Flat Profile:
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2072045998141807037 : 70
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3087265239403591524 : 110 90
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4197650231481825559 : 20
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10507721908651011566 : 10
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