Register pressure analysis

[Vladimir Makarov]

On 07/27/2011 10:26 AM, Sergey Ostanevich wrote:
> Hello!
>
> Is there any scripts/tools that parse GCC dumps and report register
> pressure in the dump - either overall, or in different parts of the
> dump?
>
-fdump-rtl-ira creates an info dump of IRA.  There is info about maximal 
pressure for each region (currently loops) and each register pressure 
class.  Loop 0 corresponds to all program.  By default, a loop region is 
created when register pressure is high.  If you need to see register 
pressure for all loops you can use option -fira-region=all.