http://bugs.llvm.org/show_bug.cgi?id=32655
Bug ID: 32655
Summary: Improve generic vector CTPOP expansion
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Common Code Generator Code
Assignee: unassignedb...@nondot.org
Reporter: bruno.card...@gmail.com
CC: llvm-bugs@lists.llvm.org
Target independent vector CTPOP expansion could be improved by using a parallel
version of the algorithm presented in
http://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetParallel
There's an old patch that does most part of the work in this direction:
https://reviews.llvm.org/D10002
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