[LLVMbugs] [Bug 22049] New: Derive alignment from `llvm.assume` outside the use/def chain.

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Dec 29 06:49:38 PST 2014


            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: unassignedbugs at nondot.org
          Reporter: josh.klontz at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    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.


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