Using address of global non-weak is tautologic

[jsonn]

Bugzilla Link	10169
Version	trunk
OS	Linux
CC	@tkremenek,@seanm

Extended Description

int foo;

int main(void)
{
  return &foo ? 1 : 0;
}

gives a warning with GCC 4.5.

Possible exceptions are: section, weak or weakref attribute set. This warning triggered at least one real bug in the NetBSD code base, so it is useful to have.

[tkremenek]

Cute. Not only should we have a warning for this, but the CFGBuilder should know about this as well to prune unreachable code.

[tkremenek]

Cloned to rdar://problem/10342153

[jsonn]

Still applies with r200573.

[philnik777]

Fixed in Clang 3.5: https://godbolt.org/z/34YqWjhnh