[llvm-bugs] [Bug 52443] New: Inconsistent multi-versioning behaviour

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=52443

            Bug ID: 52443
           Summary: Inconsistent multi-versioning behaviour
           Product: clang
           Version: 13.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: n.makhsudyan at yahoo.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Created attachment 25431
  --> https://bugs.llvm.org/attachment.cgi?id=25431&action=edit
Source code, Makefile and README

Clang generates incorrect instructions omitting multiversioned function call.

STEPS TO REPRODUCE:

1. Download the attachment and run 'make' in bug_report directory
2. Execute test and observe that nothing is printed
3. Comment out line 4 in PrintTester.C
4. Build again with 'make' and run test


SAMPLE RESULTS:
(running on a machine with avx512f support)

~/bug_report> make
...
~/bug_report> ./test

(after step3)
~/bug_report> make
...
~/bug_report> ./test
TARGET AVX512F!

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