[clang] [clang][Sema] NormalizedConstraint - fix MSVC "not all control paths return a value" warnings. NFC. (PR #162004)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Simon Pilgrim (RKSimon)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/162004.diff


1 Files Affected:

- (modified) clang/include/clang/Sema/SemaConcept.h (+2) 


``````````diff
diff --git a/clang/include/clang/Sema/SemaConcept.h b/clang/include/clang/Sema/SemaConcept.h
index 51ca1e16331f5..bdd997b18cb08 100644
--- a/clang/include/clang/Sema/SemaConcept.h
+++ b/clang/include/clang/Sema/SemaConcept.h
@@ -257,6 +257,7 @@ struct NormalizedConstraint {
     case ConstraintKind::FoldExpanded:
       return FoldExpanded.Pattern->getBeginLoc();
     }
+    llvm_unreachable("Unknown ConstraintKind enum");
   }
 
   SourceLocation getEndLoc() const {
@@ -270,6 +271,7 @@ struct NormalizedConstraint {
     case ConstraintKind::FoldExpanded:
       return FoldExpanded.Pattern->getEndLoc();
     }
+    llvm_unreachable("Unknown ConstraintKind enum");
   }
 
   SourceRange getSourceRange() const { return {getBeginLoc(), getEndLoc()}; }

``````````

</details>


https://github.com/llvm/llvm-project/pull/162004