On Tue, 2 Feb 2010, Cameron Lowell Palmer wrote:
Does Modulo Scheduling work on x86 platforms? I have tried adding in various versions of the -fmodulo-sched option and get the exact same output with or without. The application is a very simplistic matrix multiply without dependencies.
No, at present SMS is not able to schedule any loops on x86 at all. This is due to implementation detail: SMS operates on loops that end with decrement-and-branch instruction, and GCC does not generate such instructions on x86.
Sorry. Alexander Monakov
