diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index 8027c27..127c3dc 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -1373,7 +1373,7 @@
           else if (LR == I)
             L = LL;
           else
-            break;
+            continue; // Check for recurrence with L and R flipped.
           // Ok, we have a PHI of the form L op= R. Check for low
           // zero bits.
           computeKnownBits(R, Known2, Depth + 1, Q);