[llvm] [MemProf] Add ability to export or highlight only a portion of graph (PR #128255)

[via llvm-commits]

fossdd wrote:

Hi, this commit currently leads to a test fail with 21-rc1 and -rc2 on Alpine Linux edge on 32-bit architectures:

```
FAIL: LLVM :: Transforms/MemProfContextDisambiguation/dot.ll (49321 of 58891)
******************** TEST 'LLVM :: Transforms/MemProfContextDisambiguation/dot.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
not --crash /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/opt -passes=memprof-context-disambiguation -supports-hot-cold-new    -memprof-export-to-dot -memprof-dot-file-path-prefix=/builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/test/Transforms/MemProfContextDi
sambiguation/Output/dot.ll.tmp.         -memprof-dot-scope=alloc        /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll -S 2>&1 | /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/FileCheck /builds/alpine/aports/t
esting/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll --check-prefix=ERRMISSINGALLOCID # RUN: at line 6
+ not --crash /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/opt -passes=memprof-context-disambiguation -supports-hot-cold-new -memprof-export-to-dot -memprof-dot-file-path-prefix=/builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/test/Transforms/MemProfContextDis
ambiguation/Output/dot.ll.tmp. -memprof-dot-scope=alloc /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll -S
+ /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/FileCheck /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll --check-prefix=ERRMISSINGALLOCID
not --crash /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/opt -passes=memprof-context-disambiguation -supports-hot-cold-new    -memprof-export-to-dot -memprof-dot-file-path-prefix=/builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/test/Transforms/MemProfContextDi
sambiguation/Output/dot.ll.tmp.         -memprof-dot-scope=context      /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll -S 2>&1 | /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/FileCheck /builds/alpine/aports/t
esting/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll --check-prefix=ERRMISSINGCONTEXTID # RUN: at line 13
+ not --crash /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/opt -passes=memprof-context-disambiguation -supports-hot-cold-new -memprof-export-to-dot -memprof-dot-file-path-prefix=/builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/test/Transforms/MemProfContextDis
ambiguation/Output/dot.ll.tmp. -memprof-dot-scope=context /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll -S
+ /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/FileCheck /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll --check-prefix=ERRMISSINGCONTEXTID
not --crash /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/opt -passes=memprof-context-disambiguation -supports-hot-cold-new    -memprof-export-to-dot -memprof-dot-file-path-prefix=/builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/test/Transforms/MemProfContextDisambiguation/Output/dot.ll.tmp.         -memprof-dot-alloc-id=0 -memprof-dot-context-id=2       /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll -S 2>&1 | /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/FileCheck /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll --check-prefix=ERRBOTH # RUN: at line 21
+ not --crash /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/opt -passes=memprof-context-disambiguation -supports-hot-cold-new -memprof-export-to-dot -memprof-dot-file-path-prefix=/builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/test/Transforms/MemProfContextDisambiguation/Output/dot.ll.tmp. -memprof-dot-alloc-id=0 -memprof-dot-context-id=2 /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll -S
+ /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/FileCheck /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll --check-prefix=ERRBOTH
/builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/opt -passes=memprof-context-disambiguation -supports-hot-cold-new        -memprof-export-to-dot -memprof-dot-file-path-prefix=/builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/test/Transforms/MemProfContextDisambiguation/Output/dot.ll.tmp.         /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll -S 2>&1 | /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/FileCheck /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll --check-prefix=IR # RUN: at line 28
+ /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/opt -passes=memprof-context-disambiguation -supports-hot-cold-new -memprof-export-to-dot -memprof-dot-file-path-prefix=/builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/test/Transforms/MemProfContextDisambiguation/Output/dot.ll.tmp. /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll -S
+ /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/FileCheck /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll --check-prefix=IR
cat /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/test/Transforms/MemProfContextDisambiguation/Output/dot.ll.tmp.ccg.postbuild.dot | /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/FileCheck /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll -check-prefix=DOTCOMMON --check-prefix=DOTALLANDALLOC0 --check-prefix=DOTALL --check-prefix=DOTALLNONE # RUN: at line 31
+ cat /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/test/Transforms/MemProfContextDisambiguation/Output/dot.ll.tmp.ccg.postbuild.dot
+ /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/build/bin/FileCheck /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll -check-prefix=DOTCOMMON --check-prefix=DOTALLANDALLOC0 --check-prefix=DOTALL --check-prefix=DOTALLNONE
/builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll:166:14: error: DOTCOMMON: expected string not found in input
; DOTCOMMON: Node[[BAR:0x[a-z0-9]+]] [shape=record,tooltip="N[[BAR]] ContextIds: 1 2",
             ^
<stdin>:1:1: note: scanning from here
digraph "postbuild" {
^
<stdin>:4:2: note: possible intended match here
 Node0xf7672c10 [shape=record,tooltip="N0xfffffffff7672c10 ContextIds: 1 2",fillcolor="mediumorchid1",style="filled",label="{OrigId: Alloc0\n_Z3barv -\> _Znam}"];
 ^

Input file: <stdin>
Check file: /builds/alpine/aports/testing/llvm21/src/llvm-project-21.1.0-rc2.src/llvm/test/Transforms/MemProfContextDisambiguation/dot.ll

-dump-input=help explains the following input dump.

Input was:
<<<<<<
             1: digraph "postbuild" { 
check:166'0     X~~~~~~~~~~~~~~~~~~~~~ error: no match found
             2:  label="postbuild"; 
check:166'0     ~~~~~~~~~~~~~~~~~~~~
             3:  
check:166'0     ~
             4:  Node0xf7672c10 [shape=record,tooltip="N0xfffffffff7672c10 ContextIds: 1 2",fillcolor="mediumorchid1",style="filled",label="{OrigId: Alloc0\n_Z3barv -\> _Znam}"]; 
check:166'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
check:166'1      ?                                                                                                                                                                  possible intended match
             5:  Node0xf7672c60 [shape=record,tooltip="N0xfffffffff7672c60 ContextIds: 1 2 3 4",fillcolor="mediumorchid1",style="filled",label="{OrigId: 12481870273128938184\n_Z3bazv -\> _Z3barv}"]; 
check:166'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             6:  Node0xf7672c60 -> Node0xf7672c10[tooltip="ContextIds: 1 2",fillcolor="mediumorchid1",color="mediumorchid1"]; 
check:166'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             7:  Node0xf7672c60 -> Node0xf76725f0[tooltip="ContextIds: 3 4",fillcolor="mediumorchid1",color="mediumorchid1"]; 
check:166'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             8:  Node0xf7672cb0 [shape=record,tooltip="N0xfffffffff7672cb0 ContextIds: 1 2 3 4",fillcolor="mediumorchid1",style="filled",label="{OrigId: 2732490490862098848\n_Z3foov -\> _Z3bazv}"]; 
check:166'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             9:  Node0xf7672cb0 -> Node0xf7672c60[tooltip="ContextIds: 1 2 3 4",fillcolor="mediumorchid1",color="mediumorchid1"]; 
check:166'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             .
             .
             .
>>>>>>
```

Do you understand whats going on here?



https://github.com/llvm/llvm-project/pull/128255