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Author SHA1 Message Date
Craig Topper 9586d85ab3 [X86] Teach X86MCodeEmitter to properly encode zmm16-zmm31 as index register to vgatherpf/vscatterpf. 
We need to encode bit 4 into the EVEX.V' bit. We do this right
for regular gather/scatter which use either MRMSrcMem or MRMDestMem
formats.  The prefetches use MRM*m formats.

Fixes an issue recently added to PR36202.

llvm-svn: 374849
 2019-10-14 23:48:24 +00:00
Craig Topper 5e80715508 [X86] Add encoding tests for avx512pf vgatherpf/vscatterpf instructions. 
llvm-svn: 374848
 2019-10-14 23:48:12 +00:00