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llvm-project/llvm/test/Transforms/MemProfContextDisambiguation/basic.ll
Teresa Johnson 0e42c665f9
[MemProf] Update the declaration DISubprogram linkageName for clones (#149864) 
Follow up to PR145385 to also update the linkageName on any separate
DISubprogram for the clone function declaration.
2025-07-21 12:27:36 -07:00

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;; Test callsite context graph generation for simple call graph with
;; two memprof contexts and no inlining, as well as graph and IR cloning.
;;
;; Original code looks like:
;;
;; char *bar() {
;; return new char[10];
;; }
;;
;; char *baz() {
;; return bar();
;; }
;;
;; char *foo() {
;; return baz();
;; }
;;
;; int main(int argc, char **argv) {
;; char *x = foo();
;; char *y = foo();
;; memset(x, 0, 10);
;; memset(y, 0, 10);
;; delete[] x;
;; sleep(10);
;; delete[] y;
;; return 0;
;; }
;;
;; Code compiled with -mllvm -memprof-ave-lifetime-cold-threshold=5 so that the
;; memory freed after sleep(10) results in cold lifetimes.
;;
;; The IR was then reduced using llvm-reduce with the expected FileCheck input.
;; -stats requires asserts
; REQUIRES: asserts
; RUN: opt -passes=memprof-context-disambiguation -supports-hot-cold-new \
; RUN: -memprof-verify-ccg -memprof-verify-nodes -memprof-dump-ccg \
; RUN: -memprof-export-to-dot -memprof-dot-file-path-prefix=%t. \
; RUN: -stats -pass-remarks=memprof-context-disambiguation \
; RUN: -memprof-report-hinted-sizes \
; RUN: %s -S 2>&1 | FileCheck %s --check-prefix=DUMP --check-prefix=IR \
; RUN: --check-prefix=STATS --check-prefix=REMARKS --check-prefix=SIZES
; RUN: cat %t.ccg.postbuild.dot | FileCheck %s --check-prefix=DOT
;; We should have cloned bar, baz, and foo, for the cold memory allocation.
; RUN: cat %t.ccg.cloned.dot | FileCheck %s --check-prefix=DOTCLONED
;; Check again without -supports-hot-cold-new and ensure all MIB are cold and
;; that there is no cloning.
; RUN: opt -passes=memprof-context-disambiguation \
; RUN: -memprof-verify-ccg -memprof-verify-nodes -memprof-dump-ccg \
; RUN: -memprof-export-to-dot -memprof-dot-file-path-prefix=%t. \
; RUN: -stats -pass-remarks=memprof-context-disambiguation \
; RUN: %s -S 2>&1 | FileCheck %s --implicit-check-not="Callsite Context Graph" \
; RUN: --implicit-check-not="created clone"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define i32 @main() #0 {
entry:
%call = call noundef ptr @_Z3foov(), !callsite !0
%call1 = call noundef ptr @_Z3foov(), !callsite !1
ret i32 0
}
; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1
; Function Attrs: nobuiltin
declare void @_ZdaPv() #2
define internal ptr @_Z3barv() #3 !dbg !15 {
entry:
%call = call noalias noundef nonnull ptr @_Znam(i64 noundef 10) #6, !memprof !2, !callsite !7
ret ptr null
}
declare ptr @_Znam(i64)
define internal ptr @_Z3bazv() #4 {
entry:
%call = call noundef ptr @_Z3barv(), !callsite !8
ret ptr null
}
; Function Attrs: noinline
define internal ptr @_Z3foov() #5 {
entry:
%call = call noundef ptr @_Z3bazv(), !callsite !9
ret ptr null
}
; uselistorder directives
uselistorder ptr @_Z3foov, { 1, 0 }
attributes #0 = { "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { nobuiltin }
attributes #3 = { "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" }
attributes #4 = { "stack-protector-buffer-size"="8" }
attributes #5 = { noinline }
attributes #6 = { builtin }
!llvm.dbg.cu = !{!13}
!llvm.module.flags = !{!20, !21}
!0 = !{i64 8632435727821051414}
!1 = !{i64 -3421689549917153178}
!2 = !{!3, !5}
!3 = !{!4, !"notcold", !10}
!4 = !{i64 9086428284934609951, i64 -5964873800580613432, i64 2732490490862098848, i64 8632435727821051414}
!5 = !{!6, !"cold", !11, !12}
!6 = !{i64 9086428284934609951, i64 -5964873800580613432, i64 2732490490862098848, i64 -3421689549917153178}
!7 = !{i64 9086428284934609951}
!8 = !{i64 -5964873800580613432}
!9 = !{i64 2732490490862098848}
!10 = !{i64 123, i64 100}
!11 = !{i64 456, i64 200}
!12 = !{i64 789, i64 300}
!13 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !14, producer: "clang version 21.0.0git (git@github.com:llvm/llvm-project.git e391301e0e4d9183fe06e69602e87b0bc889aeda)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
!14 = !DIFile(filename: "basic.cc", directory: "", checksumkind: CSK_MD5, checksum: "8636c46e81402013b9d54e8307d2f149")
!15 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barv", scope: !14, file: !14, line: 1, type: !16, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !13, declaration: !22)
!16 = !DISubroutineType(types: !17)
!17 = !{!18}
!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
!19 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
!20 = !{i32 7, !"Dwarf Version", i32 5}
!21 = !{i32 2, !"Debug Info Version", i32 3}
!22 = !DISubprogram(name: "bar", linkageName: "_Z3barv", scope: !14, file: !14, line: 1, type: !16, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized)
; DUMP: CCG before cloning:
; DUMP: Callsite Context Graph:
; DUMP: Node [[BAR:0x[a-z0-9]+]]
; DUMP: %call = call noalias noundef nonnull ptr @_Znam(i64 noundef 10) #6 (clone 0)
; DUMP: AllocTypes: NotColdCold
; DUMP: ContextIds: 1 2
; DUMP: CalleeEdges:
; DUMP: CallerEdges:
; DUMP: Edge from Callee [[BAR]] to Caller: [[BAZ:0x[a-z0-9]+]] AllocTypes: NotColdCold ContextIds: 1 2
; DUMP: Node [[BAZ]]
; DUMP: %call = call noundef ptr @_Z3barv() (clone 0)
; DUMP: AllocTypes: NotColdCold
; DUMP: ContextIds: 1 2
; DUMP: CalleeEdges:
; DUMP: Edge from Callee [[BAR]] to Caller: [[BAZ]] AllocTypes: NotColdCold ContextIds: 1 2
; DUMP: CallerEdges:
; DUMP: Edge from Callee [[BAZ]] to Caller: [[FOO:0x[a-z0-9]+]] AllocTypes: NotColdCold ContextIds: 1 2
; DUMP: Node [[FOO]]
; DUMP: %call = call noundef ptr @_Z3bazv() (clone 0)
; DUMP: AllocTypes: NotColdCold
; DUMP: ContextIds: 1 2
; DUMP: CalleeEdges:
; DUMP: Edge from Callee [[BAZ]] to Caller: [[FOO]] AllocTypes: NotColdCold ContextIds: 1 2
; DUMP: CallerEdges:
; DUMP: Edge from Callee [[FOO]] to Caller: [[MAIN1:0x[a-z0-9]+]] AllocTypes: NotCold ContextIds: 1
; DUMP: Edge from Callee [[FOO]] to Caller: [[MAIN2:0x[a-z0-9]+]] AllocTypes: Cold ContextIds: 2
; DUMP: Node [[MAIN1]]
; DUMP: %call = call noundef ptr @_Z3foov() (clone 0)
; DUMP: AllocTypes: NotCold
; DUMP: ContextIds: 1
; DUMP: CalleeEdges:
; DUMP: Edge from Callee [[FOO]] to Caller: [[MAIN1]] AllocTypes: NotCold ContextIds: 1
; DUMP: CallerEdges:
; DUMP: Node [[MAIN2]]
; DUMP: %call1 = call noundef ptr @_Z3foov() (clone 0)
; DUMP: AllocTypes: Cold
; DUMP: ContextIds: 2
; DUMP: CalleeEdges:
; DUMP: Edge from Callee [[FOO]] to Caller: [[MAIN2]] AllocTypes: Cold ContextIds: 2
; DUMP: CallerEdges:
; DUMP: CCG after cloning:
; DUMP: Callsite Context Graph:
; DUMP: Node [[BAR:0x[a-z0-9]+]]
; DUMP: %call = call noalias noundef nonnull ptr @_Znam(i64 noundef 10) #6 (clone 0)
; DUMP: AllocTypes: NotCold
; DUMP: ContextIds: 1
; DUMP: CalleeEdges:
; DUMP: CallerEdges:
; DUMP: Edge from Callee [[BAR]] to Caller: [[BAZ:0x[a-z0-9]+]] AllocTypes: NotCold ContextIds: 1
; DUMP: Clones: [[BAR2:0x[a-z0-9]+]]
; DUMP: Node [[BAZ]]
; DUMP: %call = call noundef ptr @_Z3barv() (clone 0)
; DUMP: AllocTypes: NotCold
; DUMP: ContextIds: 1
; DUMP: CalleeEdges:
; DUMP: Edge from Callee [[BAR]] to Caller: [[BAZ]] AllocTypes: NotCold ContextIds: 1
; DUMP: CallerEdges:
; DUMP: Edge from Callee [[BAZ]] to Caller: [[FOO:0x[a-z0-9]+]] AllocTypes: NotCold ContextIds: 1
; DUMP: Clones: [[BAZ2:0x[a-z0-9]+]]
; DUMP: Node [[FOO]]
; DUMP: %call = call noundef ptr @_Z3bazv() (clone 0)
; DUMP: AllocTypes: NotCold
; DUMP: ContextIds: 1
; DUMP: CalleeEdges:
; DUMP: Edge from Callee [[BAZ]] to Caller: [[FOO]] AllocTypes: NotCold ContextIds: 1
; DUMP: CallerEdges:
; DUMP: Edge from Callee [[FOO]] to Caller: [[MAIN1:0x[a-z0-9]+]] AllocTypes: NotCold ContextIds: 1
; DUMP: Clones: [[FOO2:0x[a-z0-9]+]]
; DUMP: Node [[MAIN1]]
; DUMP: %call = call noundef ptr @_Z3foov() (clone 0)
; DUMP: AllocTypes: NotCold
; DUMP: ContextIds: 1
; DUMP: CalleeEdges:
; DUMP: Edge from Callee [[FOO]] to Caller: [[MAIN1]] AllocTypes: NotCold ContextIds: 1
; DUMP: CallerEdges:
; DUMP: Node [[MAIN2]]
; DUMP: %call1 = call noundef ptr @_Z3foov() (clone 0)
; DUMP: AllocTypes: Cold
; DUMP: ContextIds: 2
; DUMP: CalleeEdges:
; DUMP: Edge from Callee [[FOO2]] to Caller: [[MAIN2]] AllocTypes: Cold ContextIds: 2
; DUMP: CallerEdges:
; DUMP: Node [[FOO2]]
; DUMP: %call = call noundef ptr @_Z3bazv() (clone 0)
; DUMP: AllocTypes: Cold
; DUMP: ContextIds: 2
; DUMP: CalleeEdges:
; DUMP: Edge from Callee [[BAZ2]] to Caller: [[FOO2]] AllocTypes: Cold ContextIds: 2
; DUMP: CallerEdges:
; DUMP: Edge from Callee [[FOO2]] to Caller: [[MAIN2:0x[a-z0-9]+]] AllocTypes: Cold ContextIds: 2
; DUMP: Clone of [[FOO]]
; DUMP: Node [[BAZ2]]
; DUMP: %call = call noundef ptr @_Z3barv() (clone 0)
; DUMP: AllocTypes: Cold
; DUMP: ContextIds: 2
; DUMP: CalleeEdges:
; DUMP: Edge from Callee [[BAR2]] to Caller: [[BAZ2]] AllocTypes: Cold ContextIds: 2
; DUMP: CallerEdges:
; DUMP: Edge from Callee [[BAZ2]] to Caller: [[FOO2]] AllocTypes: Cold ContextIds: 2
; DUMP: Clone of [[BAZ]]
; DUMP: Node [[BAR2]]
; DUMP: %call = call noalias noundef nonnull ptr @_Znam(i64 noundef 10) #6 (clone 0)
; DUMP: AllocTypes: Cold
; DUMP: ContextIds: 2
; DUMP: CalleeEdges:
; DUMP: CallerEdges:
; DUMP: Edge from Callee [[BAR2]] to Caller: [[BAZ2]] AllocTypes: Cold ContextIds: 2
; DUMP: Clone of [[BAR]]
; REMARKS: created clone _Z3barv.memprof.1
; REMARKS: created clone _Z3bazv.memprof.1
; REMARKS: created clone _Z3foov.memprof.1
; REMARKS: call in clone main assigned to call function clone _Z3foov.memprof.1
; REMARKS: call in clone _Z3foov.memprof.1 assigned to call function clone _Z3bazv.memprof.1
; REMARKS: call in clone _Z3bazv.memprof.1 assigned to call function clone _Z3barv.memprof.1
; REMARKS: call in clone _Z3barv.memprof.1 marked with memprof allocation attribute cold
; REMARKS: call in clone main assigned to call function clone _Z3foov
; REMARKS: call in clone _Z3foov assigned to call function clone _Z3bazv
; REMARKS: call in clone _Z3bazv assigned to call function clone _Z3barv
; REMARKS: call in clone _Z3barv marked with memprof allocation attribute notcold
; SIZES: NotCold full allocation context 123 with total size 100 is NotCold after cloning (context id 1)
; SIZES: Cold full allocation context 456 with total size 200 is Cold after cloning (context id 2)
; SIZES: Cold full allocation context 789 with total size 300 is Cold after cloning (context id 2)
; IR: define {{.*}} @main
;; The first call to foo does not allocate cold memory. It should call the
;; original functions, which ultimately call the original allocation decorated
;; with a "notcold" attribute.
; IR: call {{.*}} @_Z3foov()
;; The second call to foo allocates cold memory. It should call cloned functions
;; which ultimately call a cloned allocation decorated with a "cold" attribute.
; IR: call {{.*}} @_Z3foov.memprof.1()
; IR: define internal {{.*}} @_Z3barv()
; IR: call {{.*}} @_Znam(i64 noundef 10) #[[NOTCOLD:[0-9]+]]
; IR: define internal {{.*}} @_Z3bazv()
; IR: call {{.*}} @_Z3barv()
; IR: define internal {{.*}} @_Z3foov()
; IR: call {{.*}} @_Z3bazv()
; IR: define internal {{.*}} @_Z3barv.memprof.1() {{.*}} !dbg ![[SP:[0-9]+]]
; IR: call {{.*}} @_Znam(i64 noundef 10) #[[COLD:[0-9]+]]
; IR: define internal {{.*}} @_Z3bazv.memprof.1()
; IR: call {{.*}} @_Z3barv.memprof.1()
; IR: define internal {{.*}} @_Z3foov.memprof.1()
; IR: call {{.*}} @_Z3bazv.memprof.1()
; IR: attributes #[[NOTCOLD]] = { builtin "memprof"="notcold" }
; IR: attributes #[[COLD]] = { builtin "memprof"="cold" }
;; Make sure the clone's linkageName was updated.
; IR: ![[SP]] = distinct !DISubprogram(name: "bar", linkageName: "_Z3barv.memprof.1", {{.*}} declaration: ![[SP2:[0-9]+]])
; IR: ![[SP2]] = !DISubprogram(name: "bar", linkageName: "_Z3barv.memprof.1"
; STATS: 1 memprof-context-disambiguation - Number of cold static allocations (possibly cloned)
; STATS: 1 memprof-context-disambiguation - Number of not cold static allocations (possibly cloned)
; STATS: 3 memprof-context-disambiguation - Number of function clones created during whole program analysis
; DOT: digraph "postbuild" {
; DOT: label="postbuild";
; DOT: Node[[BAR:0x[a-z0-9]+]] [shape=record,tooltip="N[[BAR]] ContextIds: 1 2",fillcolor="mediumorchid1",style="filled",label="{OrigId: Alloc0\n_Z3barv -\> _Znam}"];
; DOT: Node[[BAZ:0x[a-z0-9]+]] [shape=record,tooltip="N[[BAZ]] ContextIds: 1 2",fillcolor="mediumorchid1",style="filled",label="{OrigId: 12481870273128938184\n_Z3bazv -\> _Z3barv}"];
; DOT: Node[[BAZ]] -> Node[[BAR]][tooltip="ContextIds: 1 2",fillcolor="mediumorchid1",color="mediumorchid1"];
; DOT: Node[[FOO:0x[a-z0-9]+]] [shape=record,tooltip="N[[FOO]] ContextIds: 1 2",fillcolor="mediumorchid1",style="filled",label="{OrigId: 2732490490862098848\n_Z3foov -\> _Z3bazv}"];
; DOT: Node[[FOO]] -> Node[[BAZ]][tooltip="ContextIds: 1 2",fillcolor="mediumorchid1",color="mediumorchid1"];
; DOT: Node[[MAIN1:0x[a-z0-9]+]] [shape=record,tooltip="N[[MAIN1]] ContextIds: 1",fillcolor="brown1",style="filled",label="{OrigId: 8632435727821051414\nmain -\> _Z3foov}"];
; DOT: Node[[MAIN1]] -> Node[[FOO]][tooltip="ContextIds: 1",fillcolor="brown1",color="brown1"];
; DOT: Node[[MAIN2:0x[a-z0-9]+]] [shape=record,tooltip="N[[MAIN2]] ContextIds: 2",fillcolor="cyan",style="filled",label="{OrigId: 15025054523792398438\nmain -\> _Z3foov}"];
; DOT: Node[[MAIN2]] -> Node[[FOO]][tooltip="ContextIds: 2",fillcolor="cyan",color="cyan"];
; DOT: }
; DOTCLONED: digraph "cloned" {
; DOTCLONED: label="cloned";
; DOTCLONED: Node[[BAR:0x[a-z0-9]+]] [shape=record,tooltip="N[[BAR]] ContextIds: 1",fillcolor="brown1",style="filled",label="{OrigId: Alloc0\n_Z3barv -\> _Znam}"];
; DOTCLONED: Node[[BAZ:0x[a-z0-9]+]] [shape=record,tooltip="N[[BAZ]] ContextIds: 1",fillcolor="brown1",style="filled",label="{OrigId: 12481870273128938184\n_Z3bazv -\> _Z3barv}"];
; DOTCLONED: Node[[BAZ]] -> Node[[BAR]][tooltip="ContextIds: 1",fillcolor="brown1",color="brown1"];
; DOTCLONED: Node[[FOO:0x[a-z0-9]+]] [shape=record,tooltip="N[[FOO]] ContextIds: 1",fillcolor="brown1",style="filled",label="{OrigId: 2732490490862098848\n_Z3foov -\> _Z3bazv}"];
; DOTCLONED: Node[[FOO]] -> Node[[BAZ]][tooltip="ContextIds: 1",fillcolor="brown1",color="brown1"];
; DOTCLONED: Node[[MAIN1:0x[a-z0-9]+]] [shape=record,tooltip="N[[MAIN1]] ContextIds: 1",fillcolor="brown1",style="filled",label="{OrigId: 8632435727821051414\nmain -\> _Z3foov}"];
; DOTCLONED: Node[[MAIN1]] -> Node[[FOO]][tooltip="ContextIds: 1",fillcolor="brown1",color="brown1"];
; DOTCLONED: Node[[MAIN2:0x[a-z0-9]+]] [shape=record,tooltip="N[[MAIN2]] ContextIds: 2",fillcolor="cyan",style="filled",label="{OrigId: 15025054523792398438\nmain -\> _Z3foov}"];
; DOTCLONED: Node[[MAIN2]] -> Node[[FOO2:0x[a-z0-9]+]][tooltip="ContextIds: 2",fillcolor="cyan",color="cyan"];
; DOTCLONED: Node[[FOO2]] [shape=record,tooltip="N[[FOO2]] ContextIds: 2",fillcolor="cyan",color="blue",style="filled,bold,dashed",label="{OrigId: 0\n_Z3foov -\> _Z3bazv}"];
; DOTCLONED: Node[[FOO2]] -> Node[[BAZ2:0x[a-z0-9]+]][tooltip="ContextIds: 2",fillcolor="cyan",color="cyan"];
; DOTCLONED: Node[[BAZ2]] [shape=record,tooltip="N[[BAZ2]] ContextIds: 2",fillcolor="cyan",color="blue",style="filled,bold,dashed",label="{OrigId: 0\n_Z3bazv -\> _Z3barv}"];
; DOTCLONED: Node[[BAZ2]] -> Node[[BAR2:0x[a-z0-9]+]][tooltip="ContextIds: 2",fillcolor="cyan",color="cyan"];
; DOTCLONED: Node[[BAR2]] [shape=record,tooltip="N[[BAR2]] ContextIds: 2",fillcolor="cyan",color="blue",style="filled,bold,dashed",label="{OrigId: Alloc0\n_Z3barv -\> _Znam}"];
; DOTCLONED: }
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