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
@@ -724,6 +724,18 @@
       if (attr.getValue())
         llvmArg.addAttr(llvm::Attribute::AttrKind::NoAlias);
     }
+
+    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())));
+    }
+
     valueMapping[mlirArg] = &llvmArg;
     argIdx++;
   }
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(...)