Add SplitAnalysis::getNumLiveBlocks().
authorJakob Stoklund Olesen <stoklund@2pi.dk>
Sat, 28 May 2011 02:32:57 +0000 (02:32 +0000)
committerJakob Stoklund Olesen <stoklund@2pi.dk>
Sat, 28 May 2011 02:32:57 +0000 (02:32 +0000)
commitb2abfa0bf30edf292a27a06e091d03983e644c9b
tree036a9b0db655d8563249f1c9774da62de6943537
parent5e93d1c61553628a9104ac19ce5edf165a7229b2
Add SplitAnalysis::getNumLiveBlocks().

It is important that this function returns the same number of live blocks as
countLiveBlocks(CurLI) because live range splitting uses the number of live
blocks to ensure it is making progress.

This is in preparation of supporting duplicate UseBlock entries for basic blocks
that have a virtual register live-in and live-out, but not live-though.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132244 91177308-0d34-0410-b5e6-96231b3b80d8
lib/CodeGen/RegAllocGreedy.cpp
lib/CodeGen/SplitKit.cpp
lib/CodeGen/SplitKit.h