Minimize the slot indexes spanned by register ranges created when splitting.
When an interfering live range ends at a dead slot index between two
instructions, make sure that the inserted copy instruction gets a slot index
after the dead ones. This makes it possible to avoid the interference.
Ideally, there shouldn't be interference ending at a deleted instruction, but
physical register coalescing can sometimes do that to sub-registers.
This fixes PR9823.
llvm-svn: 130687
diff --git a/llvm/lib/CodeGen/LiveRangeEdit.h b/llvm/lib/CodeGen/LiveRangeEdit.h
index c008d76..14d227e6 100644
--- a/llvm/lib/CodeGen/LiveRangeEdit.h
+++ b/llvm/lib/CodeGen/LiveRangeEdit.h
@@ -165,7 +165,8 @@
const Remat &RM,
LiveIntervals&,
const TargetInstrInfo&,
- const TargetRegisterInfo&);
+ const TargetRegisterInfo&,
+ bool Late = false);
/// markRematerialized - explicitly mark a value as rematerialized after doing
/// it manually.