diff --git a/llvm/include/llvm/IR/PatternMatch.h b/llvm/include/llvm/IR/PatternMatch.h
--- a/llvm/include/llvm/IR/PatternMatch.h
+++ b/llvm/include/llvm/IR/PatternMatch.h
@@ -1235,6 +1235,9 @@
       return Op1.match(I->getOperand(0)) && Op2.match(I->getOperand(1)) &&
              Op3.match(I->getOperand(2));
     }
+    if (auto *CE = dyn_cast<ConstantExpr>(V))
+      return (CE->getOpcode() == Opcode) && Op1.match(CE->getOperand(0)) &&
+             Op2.match(CE->getOperand(1)) && Op3.match(CE->getOperand(2));
     return false;
   }
 };