[clang] [clang][NFC] simplify the unset check in `ParseLabeledStatement` (PR #117430)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Congcong Cai (HerrCai0907)

<details>
<summary>Changes</summary>

`!isInvalid &amp;&amp; !isUsable -&gt; !isInvalid &amp;&amp; !(!isInvalid 
&amp;&amp; !isUnset) -&gt; isUnset`
It is more simple to understand.


---
Full diff: https://github.com/llvm/llvm-project/pull/117430.diff


1 Files Affected:

- (modified) clang/lib/Parse/ParseStmt.cpp (+1-1) 


``````````diff
diff --git a/clang/lib/Parse/ParseStmt.cpp b/clang/lib/Parse/ParseStmt.cpp
index f6d787a0c88319..cd4504630f8719 100644
--- a/clang/lib/Parse/ParseStmt.cpp
+++ b/clang/lib/Parse/ParseStmt.cpp
@@ -799,7 +799,7 @@ StmtResult Parser::ParseLabeledStatement(ParsedAttributes 
&Attrs,
   }
 
   // If we've not parsed a statement yet, parse one now.
-  if (!SubStmt.isInvalid() && !SubStmt.isUsable())
+  if (SubStmt.isUnset())
     SubStmt = ParseStatement(nullptr, StmtCtx);
 
   // Broken substmt shouldn't prevent the label from being added to the AST.

``````````

</details>


https://github.com/llvm/llvm-project/pull/117430
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