http://llvm.org/bugs/show_bug.cgi?id=9184
Summary: PassManager should minimize number of LoopPassManagers
Product: libraries
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: Core LLVM classes
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Currently, this analysis usage (taken from LoopStrengthReduce)
AU.addRequired<LoopInfo>();
AU.addRequiredID(LoopSimplifyID);
AU.addRequired<DominatorTree>();
AU.addRequired<ScalarEvolution>();
AU.addRequired<IVUsers>();
causes this pass order:
Natural Loop Information
Loop Pass Manager
Canonicalize natural loops
Scalar Evolution Analysis
Loop Pass Manager
Induction Variable Users
Canonicalize natural loops
Induction Variable Users
Loop Strength Reduction
The PassManager should move ScalarEvolution before all of the loop passes,
since they all preserve ScalarEvolution. It is easy enough to fix this by
changing the pass ordering, but in the future this could be done automatically.
--
Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
