Autotuning parameters/heuristics within gcc - best place to start?

Hi, I am planning to begin a project to explore the space of tuning gcc internals in an effort to increase performance. I am wondering if anyone can point to me any parameterizations, heuristics, or priorities functions within gcc that can be tuned/adjusted. Some general areas I am considering inc

Using add_stmt in gimplify.c

Hello Everyone, I am trying to add some information/instructions into loop statements in GCC front-end. For this, in the previous gcc, I have used "add_stmt" to insert these instructions and they worked fine. When I do it in gcc 4.6 (snapshot 2010/12/4) I get "undefined references to "add_s

Re: Using add_stmt in gimplify.c

Is there any change I should do to the Makefile.in or any other files? Is there any specific header files I should add ? (I have c-family/c-common.h). Regards, Bobby - Original Message From: Ian Lance Taylor To: Robert Stevenson Cc: g...@gnu.org Sent: Wed, December 15, 2010 11