Handle critical loop predecessors by making both inside and outside registers
live out.
This doesn't prevent us from inserting a loop preheader later on, if that is
better.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117424 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SplitKit.h b/lib/CodeGen/SplitKit.h
index 08fac7f..9c109dc 100644
--- a/lib/CodeGen/SplitKit.h
+++ b/lib/CodeGen/SplitKit.h
@@ -200,7 +200,7 @@
// extendTo - Find the last li_ value defined in MBB at or before Idx. The
// parentli is assumed to be live at Idx. Extend the live range to include
// Idx. Return the found VNInfo, or NULL.
- VNInfo *extendTo(MachineBasicBlock *MBB, SlotIndex Idx);
+ VNInfo *extendTo(const MachineBasicBlock *MBB, SlotIndex Idx);
/// isMapped - Return true is ParentVNI is a known mapped value. It may be a
/// simple 1-1 mapping or a complex mapping to later defs.
@@ -271,6 +271,10 @@
/// truncating any overlap with intervals_.
void addTruncSimpleRange(SlotIndex Start, SlotIndex End, VNInfo *VNI);
+ /// criticalPreds_ - Set of basic blocks where both dupli and openli should be
+ /// live out because of a critical edge.
+ SplitAnalysis::BlockPtrSet criticalPreds_;
+
/// computeRemainder - Compute the dupli liveness as the complement of all the
/// new intervals.
void computeRemainder();