[llvm-bugs] [Bug 24392] New: Support for silvermont family 6 model 90 (Intel Atom Z3580)

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https://llvm.org/bugs/show_bug.cgi?id=24392

            Bug ID: 24392
           Summary: Support for silvermont family 6 model 90 (Intel Atom
                    Z3580)
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Core LLVM classes
          Assignee: unassignedbugs at nondot.org
          Reporter: daniel.kravetz at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 14708
  --> https://llvm.org/bugs/attachment.cgi?id=14708&action=edit
Screenshot of X Term after cat /proc/cpuinfo on Arch Linux x86

Currently I own a device (Asus ZenFone 2) with the Intel Atom Z3580 processor,
which is identified as family 6, model 90 by doing cat /proc/cpuinfo. LLVM
refuses to recognize it as such and there is no SSE 4.1/4.2, returning it as a
generic processor, as seen in hosts.cpp in lines 380-384 as follows:

// Atom Silvermont codes from the Intel software optimization guide.
   case 55:
   case 74:
   case 77:
     return "silvermont";

There is no "case 90:", leaving the switch statement fall to the default cases.

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