Not so stupid attempt to fix splitedgecfg

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp
index bf23ecac4d..7d60095160 100644
--- a/lib/CodeGen/PHIElimination.cpp
+++ b/lib/CodeGen/PHIElimination.cpp
@@ -567,6 +567,10 @@ bool PHIElimination::SplitPHIEdges(MachineFunction &MF,
       const MachineLoop *PreLoop = MLI ? MLI->getLoopFor(PreMBB) : 0;
       if (IsLoopHeader && PreLoop == CurLoop && !SplitAllCriticalEdges)
         continue;
+      // Splitting exit block of a block will introduce multiple exit block :
+      // Ask the target if it is able to handle such situation
+      if (PreLoop && PreLoop != CurLoop && e > 3)
+        continue;
 
       // LV doesn't consider a phi use live-out, so isLiveOut only returns true
       // when the source register is live-out for some other reason than a phi