http://llvm.org/bugs/show_bug.cgi?id=18813
Bug ID: 18813
Summary: Alias handles case of "0+pointertoint" incorrect
Product: tools
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: opt
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
This issue is reproducible with LLVM trunk.
The reproducer is attached.
Command to reproduce: opt reproducer_load.ll -dse -basicaa > temp.bc
Optimizer deletes first "store" instruction (dead store elimination stage)
although it is needed for subsequent "load" instruction. It seems that it is an
alias problem. Alias analysis doesn't understand that "a" and "ptr" locations
are the same.
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