* Add four new cases to handle the new optimizations for strlen, dealing
with:
strlen(x) != 0 -> *x != 0
strlen(x) == 0 -> *x == 0
for each of two cases: strlen(x) != 0 and strlen(x) == 0
llvm-svn: 21767
* Rename ExitInMain and StrCat tests so they don't have the date the
regression was entered since they are feature tests, not regressions.
llvm-svn: 21558
