[MC] Add llvm_unreachable to toString to fix compile time warning.

Without this change, GCC 7 raises the warning below:
        control reaches end of non-void function

Reviewers: sbc100, andreadb

Reviewed By: andreadb

Differential Revision: https://reviews.llvm.org/D46304

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331255 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/MC/WasmObjectWriter.cpp b/lib/MC/WasmObjectWriter.cpp
index fa26a28..b3f3a34 100644 (file)
--- a/lib/MC/WasmObjectWriter.cpp
+++ b/lib/MC/WasmObjectWriter.cpp
@@ -47,9 +47,8 @@ static std::string toString(wasm::WasmSymbolType type) {
     return "WASM_SYMBOL_TYPE_DATA";
   case wasm::WASM_SYMBOL_TYPE_SECTION:
     return "WASM_SYMBOL_TYPE_SECTION";
-  default:
-    llvm_unreachable("unexpected kind");
   }
+  llvm_unreachable("unknown symbol type");
 }
 
 static std::string relocTypetoString(uint32_t type) {