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3 Commits

Author SHA1 Message Date
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 f34ae32a6b Avoid moving iterators when the previous block was just visited. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129081 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-07 17:27:50 +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