http://llvm.org/bugs/show_bug.cgi?id=22049
Bug ID: 22049
Summary: Derive alignment from `llvm.assume` outside the
use/def chain.
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Loop Optimizer
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
The issue is explained in full with an example in [1]. In short, the issue
arises when articulating the alignment of a variable/zero sized array in a
struct. In this case, loads and stores from the array don't share a use/def
chain with alignment fact.
[1]
http://llvm.1065342.n5.nabble.com/Correct-usage-of-llvm-assume-for-loop-vectorization-alignment-td75757.html
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