[flang-commits] [clang] [flang] [llvm] Fix and reapply IR PGO support for Flang (PR #142892)

[LLVM Continuous Integration via flang-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `flang-aarch64-release` running on `linaro-flang-aarch64-release` while building `clang,flang,llvm` at step 6 "test-build-unified-tree-check-flang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/172/builds/13173

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

```
Step 6 (test-build-unified-tree-check-flang) failure: test (failure)
******************** TEST 'Flang :: Semantics/modfile75.F90' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
/home/tcwg-buildbot/worker/flang-aarch64-release/build/bin/flang -c -fhermetic-module-files -DWHICH=1 /home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90 && /home/tcwg-buildbot/worker/flang-aarch64-release/build/bin/flang -c -fhermetic-module-files -DWHICH=2 /home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90 && /home/tcwg-buildbot/worker/flang-aarch64-release/build/bin/flang -fc1 -fdebug-unparse /home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90 | /home/tcwg-buildbot/worker/flang-aarch64-release/build/bin/FileCheck /home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90 # RUN: at line 1
+ /home/tcwg-buildbot/worker/flang-aarch64-release/build/bin/flang -c -fhermetic-module-files -DWHICH=1 /home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90
+ /home/tcwg-buildbot/worker/flang-aarch64-release/build/bin/flang -c -fhermetic-module-files -DWHICH=2 /home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90
+ /home/tcwg-buildbot/worker/flang-aarch64-release/build/bin/flang -fc1 -fdebug-unparse /home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90
+ /home/tcwg-buildbot/worker/flang-aarch64-release/build/bin/FileCheck /home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90
error: Semantic errors in /home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90
/home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90:15:11: error: Must be a constant value
    integer(c_int) n
            ^^^^^
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/tcwg-buildbot/worker/flang-aarch64-release/build/bin/FileCheck /home/tcwg-buildbot/worker/flang-aarch64-release/llvm-project/flang/test/Semantics/modfile75.F90

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/142892