https://llvm.org/bugs/show_bug.cgi?id=27404
Bug ID: 27404
Summary: SLP Vectorizer needs to refuse unsafe IEEE
transformations
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: ARM
Assignee: unassignedb...@nondot.org
Reporter: renato.go...@linaro.org
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Just like Bug #16275, the SLP vectorizer needs to understand when not to
vectorise using NEON. If we avoid vectorization (ex. high cost), scalar VFP
instructions will be chosen instead, as expected. But we should not play with
costs, rather just abort vectorization in the same way we did with the loop
vectorizer.
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