https://bugs.llvm.org/show_bug.cgi?id=43887
Bug ID: 43887
Summary: Vectorization failure due to SimplifyCFG's hoisting of
identical load from two BB's
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
https://godbolt.org/z/7tG__b
The first load is identical for both of the basic blocks,
and if we look at -print-after-all, until `Simplify the CFG` both BB's had
that load, but SimplifyCFG hoists it from both of the blocks.
And SLPVectrorizer only analyzes one basic block at the time, so
SLP: Gathering due to C,S,B,O.
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