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Author SHA1 Message Date
Florian Hahn e3ea97b049 [AArch64] Skip isZIPMask check for masks with an odd number of elements. 
We process 2 elements at a time and expect the number of elements to be
even. Similar to D60690.

Reviewers: dmgreen, samparker, t.p.northover

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D65400

llvm-svn: 367831
 2019-08-05 11:12:23 +00:00
Florian Hahn 4a8835c655 [AArch64] Skip mask checks for masks with an odd number of elements. 
Some checks in isShuffleMaskLegal expect an even number of elements,
e.g. isTRN_v_undef_Mask or isUZP_v_undef_Mask, otherwise they access
invalid elements and crash. This patch adds checks to the impacted
functions.

Fixes PR41951

Reviewers: t.p.northover, dmgreen, samparker

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D60690

llvm-svn: 361235
 2019-05-21 10:05:26 +00:00