derek.holloway
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195 lines
8.0 KiB
LLVM
195 lines
8.0 KiB
LLVM
; REQUIRES: asserts
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; asserts are required for -debug-only=<pass-name> and -stats
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; RUN: rm -rf %t && split-file %s %t && cd %t
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;; Read text profiles and merge them into indexed profiles.
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; RUN: llvm-profdata merge --memprof-version=4 memprof.yaml -o memprof.profdata
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; RUN: llvm-profdata merge --memprof-version=4 memprof-no-dap.yaml -o memprof-no-dap.profdata
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;; Run optimizer pass on an IR module without IR functions, and test that global
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;; variables in the module could be annotated (i.e., no early return),
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; RUN: opt -passes='memprof-use<profile-filename=memprof.profdata>' -memprof-annotate-static-data-prefix \
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; RUN: -debug-only=memprof -stats -S funcless-module.ll -o - 2>&1 | FileCheck %s --check-prefixes=LOGCOMMON,IRCOMMON,IR,STAT
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;; Add '-memprof-annotate-string-literal-section-prefix' to RUN command above.
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; RUN: opt -passes='memprof-use<profile-filename=memprof.profdata>' -memprof-annotate-static-data-prefix \
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; RUN: -memprof-annotate-string-literal-section-prefix \
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; RUN: -debug-only=memprof -stats -S funcless-module.ll -o - 2>&1 | FileCheck %s --check-prefixes=LOGCOMMON,LOGSTR,IRCOMMON,IRSTR,STRSTAT
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;; Run optimizer pass on the IR, and check the section prefix.
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; RUN: opt -passes='memprof-use<profile-filename=memprof.profdata>' -memprof-annotate-static-data-prefix \
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; RUN: -debug-only=memprof -stats -S input.ll -o - 2>&1 | FileCheck %s --check-prefixes=LOGCOMMON,IR,STAT
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;; Add '-memprof-annotate-string-literal-section-prefix' to RUN command above.
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; RUN: opt -passes='memprof-use<profile-filename=memprof.profdata>' -memprof-annotate-static-data-prefix \
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; RUN: -memprof-annotate-string-literal-section-prefix \
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; RUN: -debug-only=memprof -stats -S input.ll -o - 2>&1 | FileCheck %s --check-prefixes=LOGCOMMON,LOGSTR,IRSTR,STRSTAT
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;; Run memprof without providing memprof data. Test that IR has module flag
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;; `EnableDataAccessProf` as 0.
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; RUN: opt -passes='memprof-use<profile-filename=memprof-no-dap.profdata>' -memprof-annotate-static-data-prefix \
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; RUN: -debug-only=memprof -stats -S input.ll -o - 2>&1 | FileCheck %s --check-prefix=FLAG
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;; Run memprof without explicitly setting -memprof-annotate-static-data-prefix.
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;; The output text IR shouldn't have `section_prefix` or EnableDataAccessProf module flag.
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; RUN: opt -passes='memprof-use<profile-filename=memprof.profdata>' \
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; RUN: -debug-only=memprof -stats -S input.ll -o - | FileCheck %s --check-prefix=FLAGLESS --implicit-check-not="section_prefix"
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; LOGSTR: Global variable .str is annotated as hot
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;; Common log lines
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; LOGCOMMON: Global variable var1 is annotated as hot
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; LOGCOMMON: Global variable var2.llvm.125 is annotated as hot
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; LOGCOMMON: Global variable bar is not annotated
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; LOGCOMMON: Global variable foo is annotated as unlikely
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; LOGCOMMON: Skip annotation for var3 due to explicit section name.
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; LOGCOMMON: Skip annotation for var4 due to explicit section name.
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; LOGCOMMON: Skip annotation for llvm.fake_var due to name starts with `llvm.`.
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; LOGCOMMON: Skip annotation for qux due to linker declaration.
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; LOGSTR: Global variable .str.llvm.98765 is annotated as unlikely
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; LOGSTR: Global variable .str.2 is not annotated
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;; String literals are not annotated.
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; IR: @.str = unnamed_addr constant [5 x i8] c"abcde"
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; IR-NOT: section_prefix
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; IR-SAME: {{$}}
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;; .str is hot
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; IRSTR: @.str = unnamed_addr constant [5 x i8] c"abcde", !section_prefix !0
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; IRCOMMON: @var1 = global i32 123, !section_prefix !0
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;; @var.llvm.125 will be canonicalized to @var2 for profile look-up.
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; IRCOMMON-NEXT: @var2.llvm.125 = global i64 0, !section_prefix !0
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;; @bar is not seen in hot symbol or known symbol set, so it won't get a section
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;; prefix. Test this by testing that there is no section_prefix between @bar and
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;; @foo.
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; IRCOMMON-NEXT: @bar = global i16 3
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; IRCOMMON-NOT: !section_prefix
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; IRCOMMON-SAME: {{$}}
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;; @foo is unlikely.
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; IRCOMMON-NEXT: @foo = global i8 2, !section_prefix !1
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; IRCOMMON-NEXT: @var3 = constant [2 x i32] [i32 12345, i32 6789], section "sec1"
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; IRCOMMON-NEXT: @var4 = constant [1 x i64] [i64 98765] #0
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; IRCOMMON: @llvm.fake_var = global i32 123
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; IRCOMMON-NOT: !section_prefix
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; IRCOMMON-SAME: {{$}}
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; IRCOMMON: @qux = external global i64
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; IRCOMMON-NOT: !section_prefix
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; IRCOMMON-SAME: {{$}}
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;; @.str.llvm.98765 is unlikely and @.str.2 has no section prefix.
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; IRSTR: @.str.llvm.98765 = constant [5 x i8] c"Joins", align 1, !section_prefix !1
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; IRSTR: @.str.2 = constant [15 x i8] c"*ptr == nullptr", align 1
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; IRSTR-NOT: section_prefix
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; IRSTR-SAME: {{$}}
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; IR: attributes #0 = { "rodata-section"="sec2" }
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; IR: !0 = !{!"section_prefix", !"hot"}
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; IR-NEXT: !1 = !{!"section_prefix", !"unlikely"}
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; IR-NEXT: !2 = !{i32 2, !"EnableDataAccessProf", i32 1}
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; FLAG: !{i32 2, !"EnableDataAccessProf", i32 0}
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; FLAGLESS-NOT: EnableDataAccessProf
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; STAT: 1 memprof - Number of global vars annotated with 'unlikely' section prefix.
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; STAT: 2 memprof - Number of global vars with user-specified section (not annotated).
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; STAT: 2 memprof - Number of global vars annotated with 'hot' section prefix.
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; STAT: 1 memprof - Number of global vars with unknown hotness (no section prefix).
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; STRSTAT: 2 memprof - Number of global vars annotated with 'unlikely' section prefix.
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; STRSTAT: 2 memprof - Number of global vars with user-specified section (not annotated).
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; STRSTAT: 3 memprof - Number of global vars annotated with 'hot' section prefix.
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; STRSTAT: 2 memprof - Number of global vars with unknown hotness (no section prefix).
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;--- memprof.yaml
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---
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DataAccessProfiles:
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SampledRecords:
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- Symbol: var1
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AccessCount: 1000
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- Symbol: var2
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AccessCount: 5
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# 4211217683648370347 is the hash for 'abcde'
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- Hash: 4211217683648370347
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AccessCount: 145
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KnownColdSymbols:
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- foo
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# 1698928196410683810 is the hash for 'Joins'
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# 9184168289490324740 is the hash for 'ptr = nullptr'. This string doesn't exist in the IR.
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KnownColdStrHashes: [ 1698928196410683810, 9184168289490324740 ]
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...
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;--- memprof-no-dap.yaml
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---
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# A memprof file with without data access profiles. The heap records are simplified
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# to pass profile parsing and don't need to match the IR.
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HeapProfileRecords:
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- GUID: 0xdeadbeef12345678
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AllocSites:
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- Callstack:
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- { Function: 0x1111111111111111, LineOffset: 11, Column: 10, IsInlineFrame: true }
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MemInfoBlock:
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AllocCount: 111
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TotalSize: 222
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TotalLifetime: 333
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TotalLifetimeAccessDensity: 444
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CallSites:
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- Frames:
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- { Function: 0x5555555555555555, LineOffset: 55, Column: 50, IsInlineFrame: true }
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...
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;--- input.ll
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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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@.str = unnamed_addr constant [5 x i8] c"abcde"
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@var1 = global i32 123
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@var2.llvm.125 = global i64 0
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@bar = global i16 3
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@foo = global i8 2
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@var3 = constant [2 x i32][i32 12345, i32 6789], section "sec1"
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@var4 = constant [1 x i64][i64 98765] #0
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@llvm.fake_var = global i32 123
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@qux = external global i64
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@.str.llvm.98765 = constant [5 x i8] c"Joins", align 1
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@.str.2 = constant [15 x i8] c"*ptr == nullptr", align 1
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define i32 @func() {
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%a = load i32, ptr @var1
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%b = load i32, ptr @var2.llvm.125
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%c = load i32, ptr @llvm.fake_var
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%ret = call i32 (...) @func_taking_arbitrary_param(i32 %a, i32 %b, i32 %c)
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ret i32 %ret
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}
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declare i32 @func_taking_arbitrary_param(...)
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attributes #0 = { "rodata-section"="sec2" }
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;--- funcless-module.ll
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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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@.str = unnamed_addr constant [5 x i8] c"abcde"
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@var1 = global i32 123
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@var2.llvm.125 = global i64 0
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@bar = global i16 3
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@foo = global i8 2
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@var3 = constant [2 x i32][i32 12345, i32 6789], section "sec1"
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@var4 = constant [1 x i64][i64 98765] #0
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@llvm.fake_var = global i32 123
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@qux = external global i64
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@.str.llvm.98765 = constant [5 x i8] c"Joins", align 1
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@.str.2 = constant [15 x i8] c"*ptr == nullptr", align 1
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attributes #0 = { "rodata-section"="sec2" }
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