[Webkit-unassigned] [Bug 280885] libjavascriptcoregtk-6.0.so.1: SIGILL on older amd64 laptop

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=280885

--- Comment #3 from Michael Orlitzky <michael at orlitzky.com> ---
Popcnt was a red herring, it's actually "roundss" causing the SIGILL. If I switch GDB to its asm layout,

  Program terminated with signal SIGILL, Illegal instruction.
  #0  0x00007fbf70f45684 in ?? () from /usr/lib64/libjavascriptcoregtk-6.0.so.1
  (gdb) layout asm
  0x7fbf70f45684  roundss $0x1,%xmm0,%xmm1

This machine lacks SSE4_1, so I don't think roundss should have been emitted.

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