Re: [patch, wwwdocs] Mention random number generators in porting_to.html

[Harald Anlauf <anlauf@gmx.de>]

Hi Thomas,

Am 18.03.23 um 19:23 schrieb Thomas Koenig via Gcc-patches:
> Hi,
> 
> Text says it all.  OK for web pages?
> 
> Best regards
> 
>      Thomas
> 
> Mention issues with integer owerflow for random number generators.
> 
> This mentions the issues with integer overflow and how to work
> around them.

it's basically fine, although I'd prefer a formulation replacing

+ <p> GCC 13 includes new optimizations which expose reliance on
+  non-standard behavior for integer overflow, which was often used
+  for linear congruential pseudo-random number generators in old
+  programs.  It is recommended to use the intrinsic

by something like:

GCC 13 includes new optimizations which may change behavior on
integer overflow.  Traditional code, like linear congruential
pseudo-random number generators in old programs and relying on a
specific, non-standard behavior may now generate unexpected results.
In such cases it is recommended to use the intrinsic ...


Thanks for updating the documentation!

Harald