[cfe-dev] Unreachable code warning change

[Morrell, Michael]

It looks like the behavior for unreachable code has changed recently.

Given this source:

===========================
int foo(int x)
{
    switch (x) {
       case 1:
          return 1;
          break;
    }
    return 0;
}
============================

When I run this clang:

Apple LLVM version 5.0 (clang-500.0.68) (based on LLVM 3.3svn)
Target: x86_64-apple-darwin13.0.0
Thread model: posix

I get the following:

% clang -Wunreachable-code -c unreach.c
unreach.c:6:11: warning: will never be executed [-Wunreachable-code]
          break;
          ^~~~~
1 warning generated.

But, when I run this clang:

Apple LLVM version 6.0 (clang-600.0.34) (based on LLVM 3.5svn)
Target: x86_64-apple-darwin14.0.0
Thread model: posix

I get no warning.

Is this an expected change?

  Michael