[llvm-bugs] [Bug 28477] New: Some -Rpass-analysis=loop-vectorize diagnostics need rewording to include "loop not vectorized" prefix

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28477

            Bug ID: 28477
           Summary: Some -Rpass-analysis=loop-vectorize diagnostics need
                    rewording to include "loop not vectorized" prefix
           Product: new-bugs
           Version: trunk
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: sean at rogue-research.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Usually clang will output something pretty clear like:

"remark: loop not vectorized: loop control flow is not understood by vectorizer
[-Rpass-analysis=loop-vectorize]"

Other times I'll see:

"remark: the cost-model indicates that interleaving is not beneficial
[-Rpass-analysis=loop-vectorize]"

Adam Nemet confirmed to me on cfe-dev that it's indeed meaning to say that the
loop was *not* vectorized.  This would be much clearer if the text included
"loop not vectorized" like the other messages.

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