2 Commits

Author	SHA1	Message	Date
Richard Smith	6b4ebcc653	At -O0, emit an @llvm.trap() call at the end of a value-returning function which ... fails to return a value, to make debugging this issue easier. llvm-svn: 165914	2012-10-15 00:23:07 +00:00
Richard Smith	9f9e5826f2	If we flow off the end of a value-returning function: ... - outside C++, return undef (behavior is not undefined unless the value is used) - in C++, with -fcatch-undefined-behavior, perform an appropriate trap - in C++, produce an 'unreachable' (behavior is undefined immediately) llvm-svn: 165273	2012-10-04 23:52:29 +00:00