Alex, Thanks for your suggestion. What target hook do you use for the backend function?
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Alex Turjan Sent: 29 May 2008 14:45 To: gcc@gcc.gnu.org Subject: RE: Implement #pragma unroll? Dear Bingfeng, Some time ago I had to deal with a similar issue as you. Basically I did as follows: I built a backend function which catches the unroll pragma and replaces it with a target assembly intrinsic (which of course has to be described in an .md file). After that in the RTL unroll phase, I analyze loop by loop and connect them to the corresponding unrolling intrinsic (which as a field contains the unrolling factor, you may add here extra information which allows you to recognize the loop) from where I decide the unrolling factor. After that in the RTL unroll phase I remove all the unroll intrinsics. hope this will help, Alex
