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Leave hasPHIKill flags alone in LiveInterval::RenumberValues.

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It is conservatively correct to keep the hasPHIKill flags, even after
deleting PHI-defs.

The calculation can be very expensive after taildup has created a
quadratic number of indirectbr edges in the CFG, and the hasPHIKill flag
isn't used for anything after RenumberValues().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139780 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-09-15 04:37:18 +00:00
parent f59c532cfd
commit 573a32d487
2 changed files with 0 additions and 22 deletions
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include/llvm/CodeGen/LiveInterval.h
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@@ -313,7 +313,6 @@ namespace llvm {
/// RenumberValues - Renumber all values in order of appearance and remove
/// unused values.
/// Recalculate phi-kill flags in case any phi-def values were removed.
void RenumberValues(LiveIntervals &lis);
/// isOnlyLROfValNo - Return true if the specified live range is the only