http://llvm.org/bugs/show_bug.cgi?id=12330
Bug #: 12330
Summary: Improve LoopStrengthReduction to handle nested loops.
Product: new-bugs
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
The LSR pass currently isn't smart enough to optimize outer loops without
pessimizing inner loops. This isn't the most important optimization, but we
have noticed cases that could be improved be LSR on outer loops. I'm attaching
five unit tests that used to work back when LLVM attempted LSR on nested loops.
Maybe they can be resurrected some day.
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