Fun corners of the C standard...
John Carter
john.carter@tait.co.nz
Tue Mar 24 03:59:00 GMT 2009
I love reading language grammars....
...to see what weird dysfunctional crap would be accepted by the
grammar, but could have no possible meaning to the instruction
generator phase of a compiler.
Like this...
======================================================================
typedef;
const;
volatile;
extern;
static;
void boo()
{
auto;
typedef const volatile;
register volatile;
static volatile;
}
======================================================================
Believe it or not, that actually compiles without errors. A good
supply of warnings mind you, but no errors and an object file is
generated.
If I compile that with gcc -O3 -fomit-frame-pointer -c and disassemble
it with objdump -S I get...
00000000 <boo>:
0: f3 c3 repz ret
Fun (in a twisted dysfunctional) kind of way.
John Carter Phone : (64)(3) 358 6639
Tait Electronics Fax : (64)(3) 359 4632
PO Box 1645 Christchurch Email : john.carter@tait.co.nz
New Zealand
More information about the Gcc-help
mailing list