[NFC][X86] extract-lowbits.ll: add patterns with truncation too

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If we look past truncations of X too eagerly (D62786), we may
end up with 64-bit 'BEXTR', even though 32-bit-one would suffice.

llvm-svn: 362319

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Roman Lebedev 2019-06-02 08:05:24 +00:00

parent 591ede411d

commit 0bfa9359b0

1 changed files with 972 additions and 132 deletions

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llvm/test/CodeGen/X86/extract-lowbits.ll

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