http://llvm.org/bugs/show_bug.cgi?id=19353
Bug ID: 19353
Summary: Provide easy to inspect vectorization information
Product: clang
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
GCC provides -ftree-vectorizer-verbose=x to inspect what the vectorizer is
doing. This allows you to see e.g. why the vectorizer is not vectorizing a
construct in which you expected vectorization (and to fix it).
AFAIK there is no easy way to obtain this information easily with clang. This
is thus a feature request.
A problem that AFAIK this option has in GCC is that it spits out _a lot_ of
information if you use it for your whole program. It would therefore make sense
to be able to delimit this information to code snippets using a pragma (e.g.
similar to those for pushing/popping warnings).
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