derek.holloway
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83 lines
4.0 KiB
LLVM
83 lines
4.0 KiB
LLVM
;; Test context disambiguation for a callgraph containing multiple memprof
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;; contexts with recursion, where we need to perform additional cloning
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;; during function assignment/cloning to handle the combination of contexts
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;; to 2 different allocations. In particular, ensures that the recursive edges
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;; are handled correctly during the function assignment cloning, where they
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;; were previously causing an assert (and infinite recursion in an NDEBUG
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;; compile).
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;;
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;; This test is a hand modified version of funcassigncloning.ll, where all
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;; the calls to new were moved into one function, with several recursive
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;; calls for the different contexts. The code as written here is somewhat
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;; nonsensical as it would produce infinite recursion, but in a real case
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;; the recursive calls would be suitably guarded.
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;;
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;; For this test we just ensure that it doesn't crash, and gets the expected
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;; cloning remarks.
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; RUN: opt -passes=memprof-context-disambiguation -supports-hot-cold-new \
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; RUN: -memprof-verify-ccg -memprof-verify-nodes \
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; RUN: -stats -pass-remarks=memprof-context-disambiguation \
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; RUN: %s -S 2>&1 | FileCheck %s --check-prefix=REMARKS
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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-unknown-linux-gnu"
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declare ptr @_Znam(i64) #1
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define internal void @_Z1DPPcS0_(ptr %0, ptr %1) #3 {
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entry:
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call void @_Z1DPPcS0_(ptr noundef %0, ptr noundef %1), !callsite !16
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call void @_Z1DPPcS0_(ptr noundef %0, ptr noundef %1), !callsite !17
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call void @_Z1DPPcS0_(ptr noundef %0, ptr noundef %1), !callsite !18
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%call = call noalias noundef nonnull ptr @_Znam(i64 noundef 10) #6, !memprof !0, !callsite !7
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%call1 = call noalias noundef nonnull ptr @_Znam(i64 noundef 10) #6, !memprof !8, !callsite !15
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ret void
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}
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; uselistorder directives
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uselistorder ptr @_Znam, { 1, 0 }
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attributes #1 = { "no-trapping-math"="true" }
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attributes #3 = { "frame-pointer"="all" }
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attributes #6 = { builtin }
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!0 = !{!1, !3, !5}
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!1 = !{!2, !"cold"}
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!2 = !{i64 -3461278137325233666, i64 -7799663586031895603, i64 -7799663586031895603}
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!3 = !{!4, !"notcold"}
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!4 = !{i64 -3461278137325233666, i64 -3483158674395044949, i64 -3483158674395044949}
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!5 = !{!6, !"notcold"}
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!6 = !{i64 -3461278137325233666, i64 -2441057035866683071, i64 -2441057035866683071}
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!7 = !{i64 -3461278137325233666}
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!8 = !{!9, !11, !13}
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!9 = !{!10, !"notcold"}
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!10 = !{i64 -1415475215210681400, i64 -2441057035866683071, i64 -2441057035866683071}
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!11 = !{!12, !"cold"}
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!12 = !{i64 -1415475215210681400, i64 -3483158674395044949, i64 -3483158674395044949}
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!13 = !{!14, !"notcold"}
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!14 = !{i64 -1415475215210681400, i64 -7799663586031895603, i64 -7799663586031895603}
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!15 = !{i64 -1415475215210681400}
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!16 = !{i64 -2441057035866683071}
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!17 = !{i64 -3483158674395044949}
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!18 = !{i64 -7799663586031895603}
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;; We greedily create a clone that is initially used by the clones of the
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;; first call to new. However, we end up with an incompatible set of callers
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;; given the second call to new which has clones with a different combination of
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;; callers. Eventually, we create 2 more clones, and the first clone becomes dead.
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; REMARKS: created clone _Z1DPPcS0_.memprof.1
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; REMARKS: created clone _Z1DPPcS0_.memprof.2
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; REMARKS: created clone _Z1DPPcS0_.memprof.3
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; REMARKS: call in clone _Z1DPPcS0_ assigned to call function clone _Z1DPPcS0_.memprof.2
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; REMARKS: call in clone _Z1DPPcS0_.memprof.2 marked with memprof allocation attribute cold
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; REMARKS: call in clone _Z1DPPcS0_ assigned to call function clone _Z1DPPcS0_.memprof.3
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; REMARKS: call in clone _Z1DPPcS0_.memprof.3 marked with memprof allocation attribute notcold
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; REMARKS: call in clone _Z1DPPcS0_ assigned to call function clone _Z1DPPcS0_
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; REMARKS: call in clone _Z1DPPcS0_ marked with memprof allocation attribute notcold
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; REMARKS: call in clone _Z1DPPcS0_.memprof.2 marked with memprof allocation attribute notcold
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; REMARKS: call in clone _Z1DPPcS0_.memprof.3 marked with memprof allocation attribute cold
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; REMARKS: call in clone _Z1DPPcS0_ marked with memprof allocation attribute notcold
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