A significant number of our tests in C accidentally use functions
without prototypes. This patch converts the function signatures to have
a prototype for the situations where the test is not specific to K&R C
declarations. e.g.,
void func();
becomes
void func(void);
This is the eighth batch of tests being updated (there are a
significant number of other tests left to be updated).
Adding trackExpressionValue to the checker so it tracks the value of the
implicit cast's DeclRefExpression up to initialization/assignment. This
way the report becomes cleaner.
Differential Revision: https://reviews.llvm.org/D109836