On Wed, May 16, 2007 at 11:16:59AM +0530, Rahul wrote: > But for -O0 optimization, even the 'progname.c.*.combine file' is > *not* getting generated for '-fdump-rtl-all / -fdump-rtl-combine' > options.
The *.combine dumpfile is generated when the combine pass runs. > Please tell me whether the combining of related instructions, by the > combiner, will be taking place only when optimization is enabled? Combination of instructions is an optimization and needs at least -O1. > if > that is the case, is there any way to make gcc recognize the 'MAC" > pattern for -O0 optimisation? It would be entirely possible to add an option such as -fcombine-instructions to enable the life1 and combine passes separately. -- Rask Ingemann Lambertsen
