MI Sched fix: assert "Disconnected LRG within the scheduling region."
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187435 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index 4e3cc3c..b088d1a 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -1017,6 +1017,12 @@
GlobalSegment->start)) {
return;
}
+ // If the prior global segment may be defined by the same two-address
+ // instruction that also defines LocalLI, then can't make a hole here.
+ if (SlotIndex::isSameInstr(llvm::prior(GlobalSegment)->start,
+ LocalLI->beginIndex())) {
+ return;
+ }
// If GlobalLI has a prior segment, it must be live into the EBB. Otherwise
// it would be a disconnected component in the live range.
assert(llvm::prior(GlobalSegment)->start < LocalLI->beginIndex() &&