diff --git a/lib/VMCore/Core.cpp b/lib/VMCore/Core.cpp
index 82edb3a4e66..7f86baab114 100644
--- a/lib/VMCore/Core.cpp
+++ b/lib/VMCore/Core.cpp
@@ -1092,7 +1092,7 @@ LLVMLinkage LLVMGetLinkage(LLVMValueRef Global) {
     return LLVMCommonLinkage;
   }
 
-  llvm_unreachable("Make GCC's unreachability happy");
+  llvm_unreachable("Invalid GlobalValue linkage!");
 }
 
 void LLVMSetLinkage(LLVMValueRef Global, LLVMLinkage Linkage) {
diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 3880133d8f2..5087935d91d 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -913,7 +913,7 @@ bool SDTypeConstraint::ApplyTypeConstraint(TreePatternNode *N,
       EnforceVectorSubVectorTypeIs(NodeToApply->getExtType(ResNo), TP);
   }
   }
-  llvm_unreachable("Make GCC's unreachability happy");
+  llvm_unreachable("Invalid ConstraintType!");
 }
 
 //===----------------------------------------------------------------------===//