diff --git a/mlir/lib/Pass/PassRegistry.cpp b/mlir/lib/Pass/PassRegistry.cpp
--- a/mlir/lib/Pass/PassRegistry.cpp
+++ b/mlir/lib/Pass/PassRegistry.cpp
@@ -588,6 +588,9 @@
       pipeline.back().options = text.substr(0, close);
       text = text.substr(close + 1);
 
+      // Consume space characters that an user might add for readability.
+      text = text.ltrim();
+
       // Skip checking for '(' because nested pipelines cannot have options.
     } else if (sep == '(') {
       text = text.substr(1);
@@ -607,6 +610,8 @@
                             "parentheses while parsing pipeline");
 
       pipelineStack.pop_back();
+      // Consume space characters that an user might add for readability.
+      text = text.ltrim();
     }
 
     // Check if we've finished parsing.
diff --git a/mlir/test/python/pass_manager.py b/mlir/test/python/pass_manager.py
--- a/mlir/test/python/pass_manager.py
+++ b/mlir/test/python/pass_manager.py
@@ -59,6 +59,18 @@
     log("Roundtrip: ", pm)
 run(testParseSuccess)
 
+# Verify successful round-trip.
+# CHECK-LABEL: TEST: testParseSpacedPipeline
+def testParseSpacedPipeline():
+  with Context():
+    # A registered pass should parse successfully even if has extras spaces for readability
+    pm = PassManager.parse("""builtin.module(
+        func.func( print-op-stats{ json=false } )
+    )""")
+    # CHECK: Roundtrip: builtin.module(func.func(print-op-stats{json=false}))
+    log("Roundtrip: ", pm)
+run(testParseSpacedPipeline)
+
 # Verify failure on unregistered pass.
 # CHECK-LABEL: TEST: testParseFail
 def testParseFail():