Reject RS_Spill ranges from local splitting as well.

All new local ranges are marked as RS_New now, so there is no need to
attempt splitting of RS_Spill ranges any more.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137002 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/RegAllocGreedy.cpp b/lib/CodeGen/RegAllocGreedy.cpp
index 450f008b67a0dccf383613c689dcd4af8854e256..4fcbdb8903e75c93e04c69e3ad8b90beb15c5eea 100644 (file)
--- a/lib/CodeGen/RegAllocGreedy.cpp
+++ b/lib/CodeGen/RegAllocGreedy.cpp
@@ -1501,6 +1501,10 @@ unsigned RAGreedy::tryLocalSplit(LiveInterval &VirtReg, AllocationOrder &Order,
 /// @return Physreg when VirtReg may be assigned and/or new NewVRegs.
 unsigned RAGreedy::trySplit(LiveInterval &VirtReg, AllocationOrder &Order,
                             SmallVectorImpl<LiveInterval*>&NewVRegs) {
+  // Ranges must be Split2 or less.
+  if (getStage(VirtReg) >= RS_Spill)
+    return 0;
+
   // Local intervals are handled separately.
   if (LIS->intervalIsInOneMBB(VirtReg)) {
     NamedRegionTimer T("Local Splitting", TimerGroupName, TimePassesIsEnabled);
@@ -1510,10 +1514,6 @@ unsigned RAGreedy::trySplit(LiveInterval &VirtReg, AllocationOrder &Order,
 
   NamedRegionTimer T("Global Splitting", TimerGroupName, TimePassesIsEnabled);
 
-  // Ranges must be Split2 or less.
-  if (getStage(VirtReg) >= RS_Spill)
-    return 0;
-
   SA->analyze(&VirtReg);
 
   // FIXME: SplitAnalysis may repair broken live ranges coming from the