How to understand gcc source code?

[Tim Prince]

Basile STARYNKEVITCH wrote:
> Hello All.
> 
> Denys Vlasenko wrote:
>> On Saturday 22 March 2008 11:14, Basile STARYNKEVITCH wrote:
>>
>>> * on the positive side, GCC is still doing well and alive

>> Why Intel and MS compilers are surpassing it?
> Honestly, I never coded last years on any Microsoft systems (except back 
> in the MSDOS 3 days). I know some colleagues, very familiar with 
> Microsoft, who still occasionally use GCC (in particular, they seems to 
> find GCC diagnostic messages better than MS Studio one's).
> 
As VC9 has no auto-vectorization, and supports only SSE2, one would hope 
it does well where those limitations are appropriate.
I haven't been able to wrap my mind around its non-standard treatment of 
cases where a variable name is shadowed in an inner scope, and there is a 
break from the inner scope.