https://bugs.kde.org/show_bug.cgi?id=508456

            Bug ID: 508456
           Summary: Illegal instruction detected (SIGILL) at pcmpistrm
    Classification: Developer tools
           Product: valgrind
      Version First 3.18.1
       Reported In:
          Platform: Ubuntu
                OS: Other
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: memcheck
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: ---

SUMMARY

Illegal instruction detected (SIGILL) when running a test under Valgrind. It is
generating an error at following instruction - 

pcmpistrm $72,%%xmm6, %%xmm8;

STEPS TO REPRODUCE
1. The program was run with following Valgrind options- 

valgrind --tool=memcheck --verbose --track-origins=yes --leak-check=full
--num-callers=48 --vgdb=yes --read-var-info=yes

OBSERVED RESULT
SIGNALS:Illegal instruction detected (SIGILL). System shutting down.

EXPECTED RESULT


SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Ubuntu 22.04.3 LTS

ADDITIONAL INFORMATION

For reference, similar issue was described in
https://bugs.kde.org/show_bug.cgi?id=348574
and handled in
https://sourceware.org/git/?p=valgrind.git;a=commitdiff;h=46b6196f0de49ad0e4267989ca5613f907ccfc5f

It seems the control byte being used i.e $72 (i.e. $0x48) is not handled here.

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