[llvm] [ctx_prof] Insert the ctx prof flattener after the module inliner (PR #107499)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-sie-ubuntu-fast` running on `sie-linux-worker` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/144/builds/6602

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: Other/opt-hot-cold-split.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -mtriple=x86_64-- -hot-cold-split=true -passes='default<Os>' -debug-pass-manager < /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -o /dev/null 2>&1 | /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -check-prefix=DEFAULT-Os
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -check-prefix=DEFAULT-Os
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -mtriple=x86_64-- -hot-cold-split=true '-passes=default<Os>' -debug-pass-manager -o /dev/null
RUN: at line 2: /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -mtriple=x86_64-- -hot-cold-split=true -passes='lto-pre-link<Os>' -debug-pass-manager < /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -o /dev/null 2>&1 | /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -check-prefix=LTO-PRELINK-Os
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -mtriple=x86_64-- -hot-cold-split=true '-passes=lto-pre-link<Os>' -debug-pass-manager -o /dev/null
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -check-prefix=LTO-PRELINK-Os
RUN: at line 3: /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -mtriple=x86_64-- -hot-cold-split=true -passes='thinlto-pre-link<Os>' -debug-pass-manager < /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -o /dev/null 2>&1 | /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -check-prefix=THINLTO-PRELINK-Os
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -mtriple=x86_64-- -hot-cold-split=true '-passes=thinlto-pre-link<Os>' -debug-pass-manager -o /dev/null
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -check-prefix=THINLTO-PRELINK-Os
RUN: at line 4: /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -mtriple=x86_64-- -hot-cold-split=true -passes='lto<Os>' -debug-pass-manager < /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -o /dev/null 2>&1 | /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -check-prefix=LTO-POSTLINK-Os
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Other/opt-hot-cold-split.ll -check-prefix=LTO-POSTLINK-Os
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -mtriple=x86_64-- -hot-cold-split=true '-passes=lto<Os>' -debug-pass-manager -o /dev/null
RUN: at line 5: /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -mtriple=x86_64-- -hot-cold-split=true -LINK-Os
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -mtriple=x86_64-- -hot-cold-split=true -LINK-Os
opt: Unknown command line argument '-LINK-Os'.  Try: '/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt --help'
opt: Did you mean '--Os'?

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/107499