90 lines
3 KiB
LLVM
90 lines
3 KiB
LLVM
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;; Test to make sure that missing tail call frames in memprof profiles are
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;; identified and cloned as needed for regular LTO.
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;; -stats requires asserts
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; REQUIRES: asserts
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; RUN: opt -passes=memprof-context-disambiguation -supports-hot-cold-new \
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; RUN: -stats %s -S 2>&1 | FileCheck %s --check-prefix=STATS --check-prefix=IR
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;; Check that a smaller search depth limit blocks the tail call discovery
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; RUN: opt -passes=memprof-context-disambiguation -supports-hot-cold-new \
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; RUN: -memprof-tail-call-search-depth=1 -stats %s -S 2>&1 | FileCheck %s \
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; RUN: --implicit-check-not=_Z3foov.memprof --implicit-check-not="found via tail calls"
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source_filename = "memprof-tailcall.cc"
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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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; Function Attrs: noinline
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; IR-LABEL: @_Z3barv()
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define ptr @_Z3barv() local_unnamed_addr #0 {
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entry:
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; IR: call ptr @_Znam(i64 10) #[[NOTCOLD:[0-9]+]]
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%call = tail call ptr @_Znam(i64 10) #2, !memprof !0, !callsite !5
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ret ptr %call
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}
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; Function Attrs: nobuiltin allocsize(0)
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declare ptr @_Znam(i64) #1
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; Function Attrs: noinline
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; IR-LABEL: @_Z3bazv()
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define ptr @_Z3bazv() #0 {
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entry:
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; IR: call ptr @_Z3barv()
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%call = tail call ptr @_Z3barv()
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ret ptr %call
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}
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; Function Attrs: noinline
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; IR-LABEL: @_Z3foov()
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define ptr @_Z3foov() #0 {
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entry:
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; IR: call ptr @_Z3bazv()
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%call = tail call ptr @_Z3bazv()
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ret ptr %call
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}
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; Function Attrs: noinline
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; IR-LABEL: @main()
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define i32 @main() #0 {
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;; The first call to foo is part of a cold context, and should use the
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;; original functions.
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;; allocation. The latter should call the cloned functions.
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; IR: call ptr @_Z3foov()
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%call = tail call ptr @_Z3foov(), !callsite !6
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;; The second call to foo is part of a cold context, and should call the
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;; cloned functions.
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; IR: call ptr @_Z3foov.memprof.1()
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%call1 = tail call ptr @_Z3foov(), !callsite !7
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ret i32 0
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}
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; IR-LABEL: @_Z3barv.memprof.1()
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; IR: call ptr @_Znam(i64 10) #[[COLD:[0-9]+]]
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; IR-LABEL: @_Z3bazv.memprof.1()
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; IR: call ptr @_Z3barv.memprof.1()
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; IR-LABEL: @_Z3foov.memprof.1()
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; IR: call ptr @_Z3bazv.memprof.1()
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; IR: attributes #[[NOTCOLD]] = { builtin allocsize(0) "memprof"="notcold" }
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; IR: attributes #[[COLD]] = { builtin allocsize(0) "memprof"="cold" }
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; STATS: 2 memprof-context-disambiguation - Number of profiled callees found via tail calls
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; STATS: 4 memprof-context-disambiguation - Aggregate depth of profiled callees found via tail calls
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; STATS: 2 memprof-context-disambiguation - Maximum depth of profiled callees found via tail calls
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attributes #0 = { noinline }
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attributes #1 = { nobuiltin allocsize(0) }
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attributes #2 = { builtin allocsize(0) }
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!0 = !{!1, !3}
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!1 = !{!2, !"notcold"}
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!2 = !{i64 3186456655321080972, i64 8632435727821051414}
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!3 = !{!4, !"cold"}
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!4 = !{i64 3186456655321080972, i64 -3421689549917153178}
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!5 = !{i64 3186456655321080972}
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!6 = !{i64 8632435727821051414}
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!7 = !{i64 -3421689549917153178}
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