Clean up static analyzer warnings.

Clang's static analyzer found several potential cases of undefined
behavior, use of un-initialized values, and potentially null pointer
dereferences in tablegen, Support, MC, and ADT. This cleans them up
with specific assertions on the assumptions of the code.

llvm-svn: 224154

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/utils/TableGen/CodeGenRegisters.cpp b/llvm/utils/TableGen/CodeGenRegisters.cpp
index d252f76..bef8a4b 100644
--- a/llvm/utils/TableGen/CodeGenRegisters.cpp
+++ b/llvm/utils/TableGen/CodeGenRegisters.cpp
@@ -146,6 +146,7 @@ void CodeGenRegister::buildObjectGraph(CodeGenRegBank &RegBank) {
 }
 
 const std::string &CodeGenRegister::getName() const {
+  assert(TheDef && "no def");
   return TheDef->getName();
 }