https://bugs.llvm.org/show_bug.cgi?id=40766
Bug ID: 40766
Summary: Complete implementation of fewerElementsVector
legalization method in GlobalISel
Product: libraries
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: GlobalISel
Assignee: unassignedb...@nondot.org
Reporter: rteres...@apple.com
CC: llvm-bugs@lists.llvm.org, quentin.colom...@gmail.com
It looks like the current version of the fewerElementsVector legalization
method in GlobalISel can handle its inputs iff originalNumberOfElements %
requestedNumberOfElements is either 0 or 1 (the vector could be split into
equally sized parts or the reminder is exactly a single scalar). It's hard to
call such a behavior orthogonal and well expected, and it looks like it may
cause subtle and hard to notice bugs and / or force people to do non-obvious
work-arounds, maybe we need to improve this. See
https://reviews.llvm.org/D58123#inline-516061 and around for more details.
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
