RE: [Dev-C++] #DEFINE versus cont variables in array inicializations

[Per W. <pw...@ia...>]

I was also talking about c++, so obviously the extension of the source
file (I normally use *.cc) tells gcc to use g++ for c++ compilation.

/Per W

On Thu, 29 May 2003, Ioannis Vranos wrote:

> > -----Original Message-----
> > From: Per Westermark [mailto:pw...@ia...]
> > Sent: Friday, May 30, 2003 2:00 AM
> > To: Ioannis Vranos
> > Cc: Dev-C++ Mailing List
> > Subject: RE: [Dev-C++] #DEFINE versus cont variables in array
> > inicializations
> >
> >
> > I guess you don't think of gcc as a decent compiler then.
> >
> > try gcc -O3 -S on the code below and look at the output.
> >   4 byte for the value 7
> >   4 byte for the SIZE reference.
> >   access loads SIZE and pushes [SIZE] (4 byte addr info + extra instr)
> >
> > with const int SIZE = 7
> >   zero byte for value
> >   every access pushes 7 directly. (4 byte value)
> >
> > Most compilers treat 'const int v = <value>' identical to #define XX
> > <value>, i.e. optimal code is generated.
>
>
>
> ... and we are talking about C++ here, so g++ is the compiler and not gcc.
>
>
>
> Ioannis Vranos
>
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