Index: mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp
===================================================================
--- mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp
+++ mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp
@@ -261,6 +261,8 @@
 
   // For other memory spaces, use the size of the pointer to the default memory
   // space.
+  if (isOpaque())
+    return dataLayout.getTypeSizeInBits(get(getContext()));
   return dataLayout.getTypeSizeInBits(get(getElementType()));
 }
 
@@ -270,6 +272,8 @@
           getPointerDataLayoutEntry(params, *this, DLEntryPos::Abi))
     return *alignment;
 
+  if (isOpaque())
+    return dataLayout.getTypeABIAlignment(get(getContext()));
   return dataLayout.getTypeABIAlignment(get(getElementType()));
 }
 
@@ -280,6 +284,8 @@
           getPointerDataLayoutEntry(params, *this, DLEntryPos::Preferred))
     return *alignment;
 
+  if (isOpaque())
+    return dataLayout.getTypePreferredAlignment(get(getContext()));
   return dataLayout.getTypePreferredAlignment(get(getElementType()));
 }
 
Index: mlir/test/Dialect/LLVMIR/layout.mlir
===================================================================
--- mlir/test/Dialect/LLVMIR/layout.mlir
+++ mlir/test/Dialect/LLVMIR/layout.mlir
@@ -33,6 +33,11 @@
     // CHECK: preferred = 8
     // CHECK: size = 8
     "test.data_layout_query"() : () -> !llvm.ptr<i8, 5>
+    // CHECK: alignment = 8
+	// CHECK: bitsize = 64
+    // CHECK: preferred = 8
+    // CHECK: size = 8
+    "test.data_layout_query"() : () -> !llvm.ptr<5>
     return
   }
 }
@@ -75,6 +80,11 @@
     // CHECK: preferred = 8
     // CHECK: size = 8
     "test.data_layout_query"() : () -> !llvm.ptr<i8, 5>
+    // CHECK: alignment = 4
+	// CHECK: bitsize = 32
+    // CHECK: preferred = 8
+    // CHECK: size = 4
+    "test.data_layout_query"() : () -> !llvm.ptr<3>
     return
   }
 }