1 files changed, 13 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/ReachingDefAnalysis.cpp b/llvm/lib/CodeGen/ReachingDefAnalysis.cpp
index cb53ea4..5a48370 100644
--- a/llvm/lib/CodeGen/ReachingDefAnalysis.cpp
+++ b/llvm/lib/CodeGen/ReachingDefAnalysis.cpp
@@ -389,6 +389,19 @@ ReachingDefAnalysis::getGlobalUses(MachineInstr *MI, int PhysReg,
   }
 }
 
+void
+ReachingDefAnalysis::getGlobalReachingDefs(MachineInstr *MI, int PhysReg,
+                                           InstSet &Defs) const {
+  if (auto *Def = getUniqueReachingMIDef(MI, PhysReg)) {
+    Defs.insert(Def);
+    return;
+  }
+
+  SmallPtrSet<MachineBasicBlock *, 2> Visited;
+  for (auto *MBB : MI->getParent()->predecessors())
+    getLiveOuts(MBB, PhysReg, Defs);
+}
+
 void ReachingDefAnalysis::getLiveOuts(MachineBasicBlock *MBB, int PhysReg,
                                       InstSet &Defs) const {
   SmallPtrSet<MachineBasicBlock*, 2> VisitedBBs;