------- Comment #1 from acn1 at cam dot ac dot uk 2007-11-09 22:56 ------- Created an attachment (id=14522) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14522&action=view) patch to gcc/config/i386/i386.c
This tries to avoid saving regs before allocating the stack frame if the frame will be bigh enough to need probes (whihc will be a call to __stkchk) when the save_regs_using_mov option has been selected. With this you will not save the one cycle in the prologue if your frame is large, but maybe you get the right answers? My patch does this for all i386 targets and that may not be necessary since the problem that bugs me only arises if TARGET_STACK_PROBE leads to generation of a call instruction. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34013
