http://llvm.org/bugs/show_bug.cgi?id=19436
Bug ID: 19436
Summary: vectorizer will turn i1* -> <n x i1>*
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Loop Optimizer
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 12377
--> http://llvm.org/bugs/attachment.cgi?id=12377&action=edit
test case
As demonstrated in the attached test case, the loop vectorizer will happily
turn a consecutive i1* load/store into a <n x i1>* load/store. However, my
understanding is that, although LLVM is currently inconsistent about this, the
desired memory representation of <n x i1> is packed, and so this transformation
is invalid.
The easiest thing will be to disable vectorizing i1*; alternatively, we could
vectorize by casting to <n x i8>* and back again.
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