diff --git a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
--- a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
+++ b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
@@ -728,6 +728,17 @@
     argIdx++;
   }
 
+  if (auto attr = func.getArgAttrOfType<IntegerAttr>(argIdx, "llvm.align")) {
+    // NB: Attribute already verified to be int, so check if we can indeed
+    // attach the attribute to this argument, based on its type.
+    auto argTy = mlirArg.getType().dyn_cast<LLVM::LLVMType>();
+    if (!argTy.getUnderlyingType()->isPointerTy())
+      return func.emitError(
+          "llvm.align attribute attached to LLVM non-pointer argument");
+    llvmArg.addAttrs(
+        llvm::AttrBuilder().addAlignmentAttr(llvm::Align(attr.getInt())));
+  }
+
   // Check the personality and set it.
   if (func.personality().hasValue()) {
     llvm::Type *ty = llvm::Type::getInt8PtrTy(llvmFunc->getContext());
diff --git a/mlir/test/Target/llvmir.mlir b/mlir/test/Target/llvmir.mlir
--- a/mlir/test/Target/llvmir.mlir
+++ b/mlir/test/Target/llvmir.mlir
@@ -927,6 +927,11 @@
   llvm.return
 }
 
+// CHECK-LABEL: define void @llvm_align(float* align 4 {{%*.}})
+llvm.func @llvm_align(%arg0: !llvm<"float*"> {llvm.align = 4}) {
+  llvm.return
+}
+
 // CHECK-LABEL: @llvm_varargs(...)
 llvm.func @llvm_varargs(...)