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;; Test to make sure that missing tail call frames in memprof profiles are
;; identified but not cloned when there are multiple non-unique possible
;; tail call chains between the profiled frames.
;; -stats requires asserts
; REQUIRES: asserts
; RUN: opt -passes=memprof-context-disambiguation -supports-hot-cold-new \
; RUN: -stats -debug %s -S 2>&1 | FileCheck %s --check-prefix=STATS \
; RUN: --check-prefix=IR --check-prefix=DEBUG
; DEBUG: Not found through unique tail call chain: _Z3barv from main that actually called xyz (found multiple possible chains)
;; Check that all calls in the IR are to the original functions, leading to a
;; non-cold operator new call.
source_filename = "tailcall-nonunique.cc"
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"
target triple = "x86_64-unknown-linux-gnu"
; Function Attrs: noinline
; IR-LABEL: @_Z3barv()
define dso_local ptr @_Z3barv() local_unnamed_addr #0 {
entry:
; IR: call ptr @_Znam(i64 10) #[[NOTCOLD:[0-9]+]]
%call = tail call ptr @_Znam(i64 10) #2, !memprof !0, !callsite !9
ret ptr %call
}
; Function Attrs: nobuiltin allocsize(0)
declare ptr @_Znam(i64) #1
; Function Attrs: noinline
; IR-LABEL: @_Z5blah1v()
define dso_local ptr @_Z5blah1v() local_unnamed_addr #0 {
entry:
; IR: call ptr @_Z3barv()
%call = tail call ptr @_Z3barv()
ret ptr %call
}
; Function Attrs: noinline
; IR-LABEL: @_Z5blah2v()
define dso_local ptr @_Z5blah2v() local_unnamed_addr #0 {
entry:
; IR: call ptr @_Z3barv()
%call = tail call ptr @_Z3barv()
ret ptr %call
}
; Function Attrs: noinline
; IR-LABEL: @_Z4baz1v()
define dso_local ptr @_Z4baz1v() local_unnamed_addr #0 {
entry:
; IR: call ptr @_Z5blah1v()
%call = tail call ptr @_Z5blah1v()
ret ptr %call
}
; Function Attrs: noinline
; IR-LABEL: @_Z4baz2v()
define dso_local ptr @_Z4baz2v() local_unnamed_addr #0 {
entry:
; IR: call ptr @_Z5blah2v()
%call = tail call ptr @_Z5blah2v()
ret ptr %call
}
; Function Attrs: noinline
; IR-LABEL: @_Z3foob(i1 %b)
define dso_local ptr @_Z3foob(i1 %b) local_unnamed_addr #0 {
entry:
br i1 %b, label %if.then, label %if.else
if.then: ; preds = %entry
; IR: call ptr @_Z4baz1v()
%call = tail call ptr @_Z4baz1v()
br label %return
if.else: ; preds = %entry
; IR: call ptr @_Z4baz2v()
%call1 = tail call ptr @_Z4baz2v()
br label %return
return: ; preds = %if.else, %if.then
%retval.0 = phi ptr [ %call, %if.then ], [ %call1, %if.else ]
ret ptr %retval.0
}
; Function Attrs: noinline
; IR-LABEL: @xyz()
define dso_local i32 @xyz() local_unnamed_addr #0 {
; IR: call ptr @_Z3foob(i1 true)
%call = tail call ptr @_Z3foob(i1 true)
; IR: call ptr @_Z3foob(i1 true)
%call1 = tail call ptr @_Z3foob(i1 true)
; IR: call ptr @_Z3foob(i1 false)
%call2 = tail call ptr @_Z3foob(i1 false)
; IR: call ptr @_Z3foob(i1 false)
%call3 = tail call ptr @_Z3foob(i1 false)
ret i32 0
}
define dso_local i32 @main() local_unnamed_addr #0 {
; IR: call i32 @xyz()
%call1 = tail call i32 @xyz(), !callsite !11
ret i32 0
}
; IR: attributes #[[NOTCOLD]] = { builtin allocsize(0) "memprof"="notcold" }
; STATS: 1 memprof-context-disambiguation - Number of profiled callees found via multiple tail call chains
attributes #0 = { noinline }
attributes #1 = { nobuiltin allocsize(0) }
attributes #2 = { builtin allocsize(0) }
!0 = !{!5, !7}
!5 = !{!6, !"notcold"}
!6 = !{i64 3186456655321080972, i64 8632435727821051414}
!7 = !{!8, !"cold"}
!8 = !{i64 3186456655321080972, i64 -3421689549917153178}
!9 = !{i64 3186456655321080972}
!11 = !{i64 -3421689549917153178}
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