From 7e84aa1b81e72d44bcc58ffe1731bfc7abb73ce0 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Sun, 20 Dec 2020 11:21:08 +0000
Subject: [PATCH] Fix MSVC "not all control paths return a value" warnings.
 NFCI.

Add missing llvm_unreachable()'s after each all-enums switch statement.
---
 clang/lib/Sema/SemaTemplate.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index 74a31c0a1b65..9d31a8701241 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -7637,6 +7637,7 @@ static Expr *BuildExpressionFromNonTypeTemplateArgumentValue(
     auto *OVE = new (S.Context) OpaqueValueExpr(Loc, T, VK);
     return ConstantExpr::Create(S.Context, OVE, Val);
   }
+  llvm_unreachable("Unhandled APValue::ValueKind enum");
 }
 
 ExprResult
@@ -7666,6 +7667,7 @@ Sema::BuildExpressionFromNonTypeTemplateArgument(const TemplateArgument &Arg,
     return BuildExpressionFromNonTypeTemplateArgumentValue(
         *this, Arg.getUncommonValueType(), Arg.getAsUncommonValue(), Loc);
   }
+  llvm_unreachable("Unhandled TemplateArgument::ArgKind enum");
 }
 
 /// Match two template parameters within template parameter lists.