[llvm-objcopy][NFCI] Fix build failure with GCC

Here is unreachable since the switch statement above is exhaustive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@364263 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/tools/llvm-objcopy/llvm-objcopy.cpp b/tools/llvm-objcopy/llvm-objcopy.cpp
index 44e0220a7d37eae2d77ec3e0f60395c216c4df92..acee368196bc42eccd0c4088c25048710e6c8364 100644 (file)
--- a/tools/llvm-objcopy/llvm-objcopy.cpp
+++ b/tools/llvm-objcopy/llvm-objcopy.cpp
@@ -150,6 +150,8 @@ static Error executeObjcopyOnRawBinary(const CopyConfig &Config,
   case FileFormat::Unspecified:
     return elf::executeObjcopyOnRawBinary(Config, In, Out);
   }
+
+  llvm_unreachable("unsupported output format");
 }
 
 /// The function executeObjcopyOnBinary does the dispatch based on the format