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
diff --git a/lib/CodeGen/RegAllocGreedy.cpp b/lib/CodeGen/RegAllocGreedy.cpp
index af77b47..2d03760 100644
--- a/lib/CodeGen/RegAllocGreedy.cpp
+++ b/lib/CodeGen/RegAllocGreedy.cpp
@@ -976,7 +976,7 @@
DebugVars->splitRegister(VirtReg.reg, LREdit.regs());
LRStage.resize(MRI->getNumVirtRegs());
- unsigned OrigBlocks = SA->getNumThroughBlocks() + SA->getUseBlocks().size();
+ unsigned OrigBlocks = SA->getNumLiveBlocks();
// Sort out the new intervals created by splitting. We get four kinds:
// - Remainder intervals should not be split again.