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260d27c8d8
This is split out from D27696, since it turned out to be a bug fix and not part of the NFC efficiency change. Keep the same adjusted (possibly decayed) threshold in both the worklist and the ImportList. Otherwise if we encountered it first along a cold path, the callee would be added to the worklist with a lower decayed threshold than when it is later encountered along a hot path. But the logic uses the threshold recorded in the ImportList entry to check if we should re-add it, and without this patch the threshold recorded there is the same along both paths so we don't re-add it. Using the same possibly decayed threshold in the ImportList ensures we re-add it later with the higher non-decayed hot path threshold. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289843 91177308-0d34-0410-b5e6-96231b3b80d8
54 lines
1.9 KiB
LLVM
54 lines
1.9 KiB
LLVM
; Test to check that callee reached from cold and then hot path gets
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; hot thresholds.
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; RUN: opt -module-summary %s -o %t.bc
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; RUN: opt -module-summary %p/Inputs/hotness_based_import2.ll -o %t2.bc
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; RUN: llvm-lto -thinlto -o %t3 %t.bc %t2.bc
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; Teset with limit set to 10 and multipliers set to 1. Since cold call to
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; hot is first in the other module, we'll first add calledFromHot to worklist
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; with threshold decayed by default 0.7 factor. Test ensures that when we
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; encounter it again from hot path, we re-enqueue with higher non-decayed
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; threshold which will allow it to be imported.
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=10 -import-hot-multiplier=1.0 -import-cold-multiplier=1.0 -S | FileCheck %s --check-prefix=CHECK
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; CHECK-DAG: define available_externally void @hot()
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; CHECK-DAG: define available_externally void @calledFromHot()
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; ModuleID = 'thinlto-function-summary-callgraph.ll'
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; This function has a high profile count, so entry block is hot.
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define void @hot_function(i1 %a, i1 %a2) !prof !28 {
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entry:
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call void @hot()
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ret void
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}
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; This function has a low profile count, so entry block is hot.
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define void @cold_function(i1 %a, i1 %a2) !prof !29 {
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entry:
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call void @hot()
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ret void
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}
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declare void @hot() #1
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!llvm.module.flags = !{!1}
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!1 = !{i32 1, !"ProfileSummary", !2}
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!2 = !{!3, !4, !5, !6, !7, !8, !9, !10}
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!3 = !{!"ProfileFormat", !"InstrProf"}
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!4 = !{!"TotalCount", i64 222}
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!5 = !{!"MaxCount", i64 110}
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!6 = !{!"MaxInternalCount", i64 1}
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!7 = !{!"MaxFunctionCount", i64 110}
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!8 = !{!"NumCounts", i64 4}
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!9 = !{!"NumFunctions", i64 3}
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!10 = !{!"DetailedSummary", !11}
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!11 = !{!12, !13, !14}
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!12 = !{i32 10000, i64 110, i32 2}
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!13 = !{i32 999000, i64 2, i32 4}
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!14 = !{i32 999999, i64 2, i32 4}
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!28 = !{!"function_entry_count", i64 110}
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!29 = !{!"function_entry_count", i64 1}
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