https://bugs.llvm.org/show_bug.cgi?id=36319
Bug ID: 36319
Summary: [ValueTracking] Add DemandedElts support to
computeKnownBits/ComputeNumSignBits
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Common Code Generator Code
Assignee: unassignedb...@nondot.org
Reporter: llvm-...@redking.me.uk
CC: craig.top...@gmail.com, david.majne...@gmail.com,
efrie...@codeaurora.org, llvm-bugs@lists.llvm.org,
spatel+l...@rotateright.com
The addition of a DemandedElts mask helped a lot for vector types in
SelectionDAG::computeKnownBits and SelectionDAG::ComputeNumSignBits, notably
making it easier to determine bits for vector shuffles and element
insertions/extractions.
If possible it'd be great to bring this to ValueTracking as well to assist
InstCombine.
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
