diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -2769,6 +2769,17 @@
     // div exact can only produce a zero if the dividend is zero.
     if (cast<PossiblyExactOperator>(I)->isExact())
       return isKnownNonZero(I->getOperand(0), DemandedElts, Depth, Q);
+    if (I->getOpcode() == Instruction::UDiv) {
+      KnownBits XKnown =
+          computeKnownBits(I->getOperand(0), DemandedElts, Depth, Q);
+      KnownBits YKnown =
+          computeKnownBits(I->getOperand(1), DemandedElts, Depth, Q);
+      std::optional<bool> YUleX = KnownBits::ule(YKnown, XKnown);
+
+      // If Y u<= X then div is only zero if X is zero.
+      if (YUleX && *YUleX)
+        return isKnownNonZero(I->getOperand(0), DemandedElts, Depth, Q);
+    }
     break;
   case Instruction::Add: {
     // X + Y.
diff --git a/llvm/test/Analysis/ValueTracking/known-non-zero.ll b/llvm/test/Analysis/ValueTracking/known-non-zero.ll
--- a/llvm/test/Analysis/ValueTracking/known-non-zero.ll
+++ b/llvm/test/Analysis/ValueTracking/known-non-zero.ll
@@ -501,12 +501,7 @@
 
 define i1 @udiv_y_le_x(i8 %xx, i8 %yy, i8 %z) {
 ; CHECK-LABEL: @udiv_y_le_x(
-; CHECK-NEXT:    [[X:%.*]] = or i8 [[XX:%.*]], 7
-; CHECK-NEXT:    [[Y:%.*]] = and i8 [[YY:%.*]], 7
-; CHECK-NEXT:    [[D:%.*]] = udiv i8 [[X]], [[Y]]
-; CHECK-NEXT:    [[O:%.*]] = or i8 [[D]], [[Z:%.*]]
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i8 [[O]], 0
-; CHECK-NEXT:    ret i1 [[R]]
+; CHECK-NEXT:    ret i1 false
 ;
   %x = or i8 %xx, 7
   %y = and i8 %yy, 7