BMI2 support is indicated in bit eight of EBX, not nine.
See Intel SDM, Vol 2A, Table 3-8:
https://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-vol-2a-manual.pdf#page=296

Differential Revision: https://reviews.llvm.org/D65766

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@367929 91177308-0d34-0410-b5e6-96231b3b80d8
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