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54c74e906a
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4 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
54c74e906a Revert r135074 and r135080. They broke clamscan. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135096 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 22:20:09 +00:00
Jakob Stoklund Olesen
1337e2b75a Move the InterferenceCache cursor into the GlobalSplitCand struct. 
This is in preparation of supporting multiple global split candidates in
a single live range split operation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135074 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 20:14:52 +00:00
Jakob Stoklund Olesen
9d29cbad32 Precompute interference for neighbor blocks as long as there is no interference. 
This doesn't require seeking in the live interval union, so it is very cheap.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129187 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-09 02:59:05 +00:00
Jakob Stoklund Olesen
5907d86365 Add an InterferenceCache class for caching per-block interference ranges. 
When the greedy register allocator is splitting multiple global live ranges, it
tends to look at the same interference data many times. The InterferenceCache
class caches queries for unaltered LiveIntervalUnions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128764 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-02 06:03:35 +00:00