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llc using the host cpu features and *waning* on unknown features is probably
not a good thing :-(
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189144 91177308-0d34-0410-b5e6-96231b3b80d8
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- Enhance the fix to PR12312 to support wider integer, such as 256-bit
integer. If more than 1 fully evaluated vectors are found, POR them
first followed by the final PTEST.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163832 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162736 91177308-0d34-0410-b5e6-96231b3b80d8
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- Add a target-specific DAG optimization to recognize a pattern PTEST-able.
Such a pattern is a OR'd tree with X86ISD::OR as the root node. When
X86ISD::OR node has only its flag result being used as a boolean value and
all its leaves are extracted from the same vector, it could be folded into an
X86ISD::PTEST node.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162735 91177308-0d34-0410-b5e6-96231b3b80d8
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