derek.holloway
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189 lines
6.7 KiB
LLVM
189 lines
6.7 KiB
LLVM
;; Test handling of memprof ThinLTO when the call to update is a weak alias
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;; where the prevailing weak aliasee is defined in a different module.
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;; -stats requires asserts
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; REQUIRES: asserts
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;; Preparation steps to generate the bitcode and perform the thin link.
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; RUN: rm -rf %t && split-file %s %t && cd %t
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; RUN: opt -thinlto-bc src1.ll >src1.o
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; RUN: opt -thinlto-bc src2.ll >src2.o
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;; First run the case where aliases (_Z8fooAliasv and _Z8fooAliasv2) and
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;; aliasees (_Z3foov and _Z3foov2, respectively) are prevailing in the same
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;; module.
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; RUN: llvm-lto2 run src1.o src2.o -enable-memprof-context-disambiguation \
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; RUN: -supports-hot-cold-new \
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; RUN: -thinlto-distributed-indexes \
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; RUN: -r=src1.o,main,plx \
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; RUN: -r=src1.o,_Znam, \
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; RUN: -r=src1.o,_Z8fooAliasv, \
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; RUN: -r=src1.o,_Z8fooAliasv2, \
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; RUN: -r=src1.o,_Z3foov,lx \
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; RUN: -r=src1.o,_Z3foov2,lx \
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; RUN: -r=src2.o,_Znam, \
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; RUN: -r=src2.o,_Z8fooAliasv,plx \
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; RUN: -r=src2.o,_Z8fooAliasv2,plx \
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; RUN: -r=src2.o,_Z3foov,plx \
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; RUN: -r=src2.o,_Z3foov2,plx \
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; RUN: -stats \
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; RUN: -o %t.out 2>&1 | FileCheck %s --implicit-check-not="prevailing in a different module"
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;; Run ThinLTO backends. We should be able to clone correctly.
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; RUN: opt -passes=memprof-context-disambiguation \
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; RUN: -memprof-import-summary=src1.o.thinlto.bc \
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; RUN: -pass-remarks=memprof-context-disambiguation \
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; RUN: src1.o -S 2>&1 | FileCheck %s --check-prefix=IR-MOD1 --implicit-check-not=_Z3foov.memprof --implicit-check-not=_Z3foov2.memprof
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; RUN: opt -passes=memprof-context-disambiguation \
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; RUN: -memprof-import-summary=src2.o.thinlto.bc \
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; RUN: -pass-remarks=memprof-context-disambiguation \
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; RUN: src2.o -S 2>&1 | FileCheck %s --check-prefix=IR-MOD2
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;; Now try where the aliasees are prevailing in the first module instead,
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;; which only has the alias declarations.
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; RUN: llvm-lto2 run src1.o src2.o -enable-memprof-context-disambiguation \
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; RUN: -supports-hot-cold-new \
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; RUN: -thinlto-distributed-indexes \
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; RUN: -r=src1.o,main,plx \
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; RUN: -r=src1.o,_Znam, \
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; RUN: -r=src1.o,_Z8fooAliasv, \
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; RUN: -r=src1.o,_Z8fooAliasv2, \
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; RUN: -r=src1.o,_Z3foov,plx \
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; RUN: -r=src1.o,_Z3foov2,plx \
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; RUN: -r=src2.o,_Znam, \
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; RUN: -r=src2.o,_Z8fooAliasv,plx \
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; RUN: -r=src2.o,_Z8fooAliasv2,plx \
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; RUN: -r=src2.o,_Z3foov,lx \
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; RUN: -r=src2.o,_Z3foov2,lx \
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; RUN: -stats \
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; RUN: -o %t.out 2>&1 | FileCheck %s --check-prefix=STATS
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;; We should have detected both aliasees and handle them conservatively.
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; STATS: 2 memprof-context-disambiguation - Number of aliasees prevailing in a different module than its alias
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;; Run ThinLTO backends. We should conservatively disable cloning.
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; RUN: opt -passes=memprof-context-disambiguation \
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; RUN: -memprof-import-summary=src1.o.thinlto.bc \
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; RUN: -pass-remarks=memprof-context-disambiguation \
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; RUN: src1.o -S 2>&1 | FileCheck %s --implicit-check-not "memprof.1"
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; RUN: opt -passes=memprof-context-disambiguation \
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; RUN: -memprof-import-summary=src2.o.thinlto.bc \
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; RUN: -pass-remarks=memprof-context-disambiguation \
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; RUN: src2.o -S 2>&1 | FileCheck %s --implicit-check-not "memprof.1"
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;--- src1.ll
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source_filename = "memprof-distrib-alias.ll"
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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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define i32 @main() #0 {
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entry:
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;; The first call to fooAlias does not allocate cold memory. It should call
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;; the original function alias, which calls the original allocation decorated
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;; with a "notcold" attribute.
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; IR-MOD1: call {{.*}} @_Z8fooAliasv()
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%call = call ptr @_Z8fooAliasv(), !callsite !0
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;; The second call to fooAlias allocates cold memory. It should call the
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;; cloned alias which calls a cloned allocation decorated with a "cold"
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;; attribute.
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; IR-MOD1: call {{.*}} @_Z8fooAliasv.memprof.1()
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%call1 = call ptr @_Z8fooAliasv(), !callsite !1
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;; The first call to fooAlias2 does not allocate cold memory. It should call
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;; the original function alias, which calls the original allocation decorated
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;; with a "notcold" attribute.
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; IR-MOD1: call {{.*}} @_Z8fooAliasv2()
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%call2 = call ptr @_Z8fooAliasv2(), !callsite !9
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;; The second call to fooAlias2 allocates cold memory. It should call the
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;; cloned alias which calls a cloned allocation decorated with a "cold"
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;; attribute.
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; IR-MOD1: call {{.*}} @_Z8fooAliasv2.memprof.1()
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%call3 = call ptr @_Z8fooAliasv2(), !callsite !10
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ret i32 0
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}
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; IR-MOD1: declare {{.*}} @_Z8fooAliasv.memprof.1()
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; IR-MOD1: declare {{.*}} @_Z8fooAliasv2.memprof.1()
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declare ptr @_Znam(i64)
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;; In this module the alias symbols are declarations. They alias with
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;; weak_odr symbols _Z3foov and _Z3foov2 which are defined in both modules.
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declare ptr @_Z8fooAliasv()
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declare ptr @_Z8fooAliasv2()
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define weak_odr ptr @_Z3foov() #0 {
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entry:
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%call = call ptr @_Znam(i64 0), !memprof !2, !callsite !7
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ret ptr null
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}
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define weak_odr ptr @_Z3foov2() #0 {
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entry:
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%call = call ptr @_Znam(i64 0), !memprof !11, !callsite !16
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ret ptr null
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}
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attributes #0 = { noinline optnone }
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!0 = !{i64 8632435727821051414}
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!1 = !{i64 -3421689549917153178}
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!2 = !{!3, !5}
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!3 = !{!4, !"notcold"}
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!4 = !{i64 9086428284934609951, i64 8632435727821051414}
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!5 = !{!6, !"cold"}
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!6 = !{i64 9086428284934609951, i64 -3421689549917153178}
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!7 = !{i64 9086428284934609951}
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!9 = !{i64 123}
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!10 = !{i64 234}
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!11 = !{!12, !14}
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!12 = !{!13, !"notcold"}
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!13 = !{i64 345, i64 123}
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!14 = !{!15, !"cold"}
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!15 = !{i64 345, i64 234}
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!16 = !{i64 345}
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;--- src2.ll
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source_filename = "memprof-distrib-alias2.ll"
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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)
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;; In this module the alias symbols are weak_odr aliases to weak_odr aliasees.
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@_Z8fooAliasv = weak_odr alias ptr (...), ptr @_Z3foov
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@_Z8fooAliasv2 = weak_odr alias ptr (...), ptr @_Z3foov2
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define weak_odr ptr @_Z3foov() #0 {
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entry:
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%call = call ptr @_Znam(i64 0), !memprof !2, !callsite !7
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ret ptr null
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}
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define weak_odr ptr @_Z3foov2() #0 {
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entry:
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%call = call ptr @_Znam(i64 0), !memprof !11, !callsite !16
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ret ptr null
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}
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; IR-MOD2: define weak_odr {{.*}} @_Z3foov()
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; IR-MOD2: call {{.*}} @_Znam(i64 0) #[[NOTCOLD:[0-9]+]]
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; IR-MOD2: define weak_odr {{.*}} @_Z3foov.memprof.1()
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; IR-MOD2: call {{.*}} @_Znam(i64 0) #[[COLD:[0-9]+]]
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; IR-MOD2: attributes #[[NOTCOLD]] = { "memprof"="notcold" }
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; IR-MOD2: attributes #[[COLD]] = { "memprof"="cold" }
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attributes #0 = { noinline optnone }
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!2 = !{!3, !5}
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!3 = !{!4, !"notcold"}
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!4 = !{i64 9086428284934609951, i64 8632435727821051414}
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!5 = !{!6, !"cold"}
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!6 = !{i64 9086428284934609951, i64 -3421689549917153178}
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!7 = !{i64 9086428284934609951}
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!11 = !{!12, !14}
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!12 = !{!13, !"notcold"}
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!13 = !{i64 345, i64 123}
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!14 = !{!15, !"cold"}
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!15 = !{i64 345, i64 234}
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!16 = !{i64 345}
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