https://bugs.llvm.org/show_bug.cgi?id=42563
Bug ID: 42563
Summary: [InstCombine] Dropping pointless masking before left
shift
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: lebedev...@gmail.com
CC: llvm-bugs@lists.llvm.org
Splitting off from https://bugs.llvm.org/show_bug.cgi?id=42456 just
so i can track them separately.
There's a bunch of patterns, even if we only look at 'masking'-like pattern.
I guess i'm stumbling into a deep untouched woods that no one had in hotpaths..
a,b: https://rise4fun.com/Alive/4zsf
c,d,e,f: https://rise4fun.com/Alive/RC49
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