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archived-llvm/test/CodeGen/SystemZ
Jonas Paulsson 0e5a502581 [SystemZ] Improved handling of the @llvm.ctlz intrinsic.
Since SystemZ supports counting of leading zeros with the FLOGR instruction,
isCheapToSpeculateCtlz() should return true, which it now does.

ISD::CTLZ_ZERO_UNDEF i32 is now handled the same way as ISD::CTLZ is, which
is needed since promotion to i64 is required and CTLZ_ZERO_UNDEF is only
expanded to CTLZ if it is Legal or Custom.

Review: Ulrich Weigand
https://reviews.llvm.org/D57710

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353330 91177308-0d34-0410-b5e6-96231b3b80d8
2019-02-06 19:23:31 +00:00
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