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a6db8552b8
Summary: We don't want to decay hot callsites to import chains of hot callsites. The same mechanism is used in LIPO. Reviewers: tejohnson, eraman, mehdi_amini Subscribers: llvm-commits, mehdi_amini Differential Revision: https://reviews.llvm.org/D24976 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282833 91177308-0d34-0410-b5e6-96231b3b80d8
138 lines
6.9 KiB
LLVM
138 lines
6.9 KiB
LLVM
; Test to check the callgraph in summary when there is PGO
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; RUN: opt -module-summary %s -o %t.bc
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; RUN: opt -module-summary %p/Inputs/hotness_based_import.ll -o %t2.bc
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; RUN: llvm-lto -thinlto -o %t3 %t.bc %t2.bc
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; Test import with default hot multiplier (3) and default hot-evolution-factor (1.0)
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=1 --S | FileCheck %s --check-prefix=CHECK --check-prefix=HOT-DEFAULT
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=1 --S -import-hot-multiplier=3.0 -import-cold-multiplier=0.0 | FileCheck %s --check-prefix=CHECK --check-prefix=HOT-DEFAULT
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=1 --S -import-hot-multiplier=3.0 | FileCheck %s --check-prefix=CHECK --check-prefix=HOT-DEFAULT
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=1 --S -import-hot-multiplier=3.0 -import-instr-evolution-factor=0.0 | FileCheck %s --check-prefix=CHECK --check-prefix=HOT-DEFAULT
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=1 --S -import-hot-multiplier=3.0 -import-hot-evolution-factor=1.0 | FileCheck %s --check-prefix=CHECK --check-prefix=HOT-DEFAULT
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; HOT-DEFAULT-DAG: define available_externally void @hot1()
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; HOT-DEFAULT-DAG: define available_externally void @hot2()
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; HOT-DEFAULT-DAG: define available_externally void @calledFromHot()
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; HOT-DEFAULT-DAG: define available_externally void @calledFromHot2()
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; HOT-DEFAULT-DAG: define available_externally void @none1()
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; HOT-DEFAULT-NOT: define available_externally void @cold()
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; HOT-DEFAULT-NOT: define available_externally void @hot3()
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; HOT-DEFAULT-NOT: define available_externally void @none2()
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; HOT-DEFAULT-NOT: define available_externally void @none3()
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; HOT-DEFAULT-NOT: define available_externally void @cold2()
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; HOT-DEFAULT-NOT: define available_externally void @calledFromCold()
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; HOT-DEFAULT-NOT: define available_externally void @calledFromNone()
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; This one tests if we decay threshold for hot callsites. With hot-evolution-factor of 0
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; we should not import any of calledFromHot functions
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=1 --S -import-hot-multiplier=3.0 -import-hot-evolution-factor=0.0 | FileCheck %s --check-prefix=CHECK --check-prefix=HOT-EVOLUTION
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; HOT-EVOLUTION-DAG: define available_externally void @hot1()
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; HOT-EVOLUTION-DAG: define available_externally void @hot2()
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; HOT-EVOLUTION-DAG: define available_externally void @none1()
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; HOT-EVOLUTION-NOT: define available_externally void @hot3()
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; HOT-EVOLUTION-NOT: define available_externally void @cold()
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; HOT-EVOLUTION-NOT: define available_externally void @none2()
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; HOT-EVOLUTION-NOT: define available_externally void @none3()
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; HOT-EVOLUTION-NOT: define available_externally void @cold2()
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; HOT-EVOLUTION-NOT: define available_externally void @calledFromHot()
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; HOT-EVOLUTION-NOT: define available_externally void @calledFromHot2()
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; Test import with hot multiplier 1.0 - treat hot callsites as normal.
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=1 -import-hot-multiplier=1.0 --S | FileCheck %s --check-prefix=CHECK --check-prefix=HOT-ONE
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; HOT-ONE-DAG: define available_externally void @hot1()
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; HOT-ONE-DAG: define available_externally void @none1()
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; HOT-ONE-NOT: define available_externally void @cold()
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; HOT-ONE-NOT: define available_externally void @hot2()
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; HOT-ONE-NOT: define available_externally void @hot3()
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; HOT-ONE-NOT: define available_externally void @none2()
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; HOT-ONE-NOT: define available_externally void @none3()
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; HOT-ONE-NOT: define available_externally void @cold2()
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=1 -import-hot-multiplier=1.0 -import-cold-multiplier=1.0 --S | FileCheck %s --check-prefix=CHECK --check-prefix=HOT-COLD-ONE
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; HOT-COLD-ONE-DAG: define available_externally void @hot1()
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; HOT-COLD-ONE-DAG: define available_externally void @cold()
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; HOT-COLD-ONE-DAG: define available_externally void @none1()
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; HOT-COLD-ONE-NOT: define available_externally void @hot2()
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; HOT-COLD-ONE-NOT: define available_externally void @hot3()
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; HOT-COLD-ONE-NOT: define available_externally void @none2()
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; HOT-COLD-ONE-NOT: define available_externally void @none3()
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; HOT-COLD-ONE-NOT: define available_externally void @cold2()
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; Test import with hot multiplier 0.0 and high threshold - don't import functions called from hot callsite.
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=10 -import-hot-multiplier=0.0 -import-cold-multiplier=1.0 --S | FileCheck %s --check-prefix=CHECK --check-prefix=HOT-ZERO
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; HOT-ZERO-DAG: define available_externally void @cold()
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; HOT-ZERO-DAG: define available_externally void @none1()
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; HOT-ZERO-DAG: define available_externally void @none2()
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; HOT-ZERO-DAG: define available_externally void @none3()
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; HOT-ZERO-DAG: define available_externally void @cold2()
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; HOT-ZERO-DAG: define available_externally void @calledFromCold()
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; HOT-ZERO-DAG: define available_externally void @calledFromNone()
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; HOT-ZERO-NOT: define available_externally void @hot2()
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; HOT-ZERO-NOT: define available_externally void @hot1()
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; HOT-ZERO-NOT: define available_externally void @hot3()
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; HOT-ZERO-NOT: define available_externally void @calledFromHot()
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; HOT-ZERO-NOT: define available_externally void @calledFromHot2()
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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 have high profile count, so entry block is hot.
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define void @hot_function(i1 %a, i1 %a2) !prof !20 {
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entry:
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call void @hot1()
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br i1 %a, label %Cold, label %Hot, !prof !41
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Cold: ; 1/1000 goes here
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call void @cold()
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call void @cold2()
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call void @hot2()
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call void @none1()
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br label %exit
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Hot: ; 999/1000 goes here
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call void @hot2()
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call void @hot3()
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br i1 %a2, label %None1, label %None2, !prof !42
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None1: ; half goes here
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call void @none1()
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call void @none2()
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br label %exit
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None2: ; half goes here
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call void @none3()
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br label %exit
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exit:
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ret void
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}
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declare void @hot1() #1
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declare void @hot2() #1
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declare void @hot3() #1
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declare void @cold() #1
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declare void @cold2() #1
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declare void @none1() #1
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declare void @none2() #1
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declare void @none3() #1
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!41 = !{!"branch_weights", i32 1, i32 1000}
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!42 = !{!"branch_weights", i32 1, i32 1}
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!llvm.module.flags = !{!1}
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!20 = !{!"function_entry_count", i64 110}
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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 10000}
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!5 = !{!"MaxCount", i64 10}
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!6 = !{!"MaxInternalCount", i64 1}
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!7 = !{!"MaxFunctionCount", i64 1000}
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!8 = !{!"NumCounts", i64 3}
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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 100, i32 1}
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!13 = !{i32 999000, i64 100, i32 1}
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!14 = !{i32 999999, i64 1, i32 2}
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