diff --git a/mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp b/mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp
--- a/mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp
+++ b/mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp
@@ -340,7 +340,7 @@
              << " to be a dense integer elements attribute with 3 or 4 "
                 "elements";
     }
-    if (!key.getElementType().isInteger(8)) {
+    if (key.getElementType() && !key.getElementType().isInteger(8)) {
       return emitError(loc) << "unexpected layout attribute for pointer to "
                             << key.getElementType();
     }
diff --git a/mlir/test/Dialect/LLVMIR/layout.mlir b/mlir/test/Dialect/LLVMIR/layout.mlir
--- a/mlir/test/Dialect/LLVMIR/layout.mlir
+++ b/mlir/test/Dialect/LLVMIR/layout.mlir
@@ -46,7 +46,8 @@
 
 module attributes { dlti.dl_spec = #dlti.dl_spec<
   #dlti.dl_entry<!llvm.ptr<i8>, dense<[32, 32, 64]> : vector<3xi32>>,
-  #dlti.dl_entry<!llvm.ptr<i8, 5>, dense<[64, 64, 64]> : vector<3xi32>>
+  #dlti.dl_entry<!llvm.ptr<i8, 5>, dense<[64, 64, 64]> : vector<3xi32>>,
+  #dlti.dl_entry<!llvm.ptr<4>, dense<[32, 64, 64]> : vector<3xi32>>
 >} {
   // CHECK: @spec
   func.func @spec() {
@@ -85,6 +86,11 @@
     // CHECK: preferred = 8
     // CHECK: size = 4
     "test.data_layout_query"() : () -> !llvm.ptr<3>
+    // CHECK: alignment = 8
+	// CHECK: bitsize = 32
+    // CHECK: preferred = 8
+    // CHECK: size = 4
+	"test.data_layout_query"() : () -> !llvm.ptr<4>
     return
   }
 }