buggy optimization levels...

[Chuck Swiger]

Hi, all--

The "known bugs" section of the GCC info documentation lists 5 issues; "man gcc" 
lists none.  Can someone provide a test case for a bug involving "cc -O" versus 
"cc -O3" under FreeBSD 4-STABLE for the x86 architecture?

What is the preferred solution?  The Dragon book and other compiler references 
have a definition of safe versus unsafe "optimizations"; is the problem that -O3 
enables something unsafe?  Who is responsible (FreeBSD, GNU compiler team, 
others?) for changing the compiler defaults so that -Ox will not produce 
known-invalid results, for any x?

-- 
-Chuck