2016-11-22 15:41 GMT+03:00 Georg-Johann Lay <a...@gjlay.de>: > This patch is a minor improvement of prologue length. It now allows frame > sizes of up to 11 to be allocated by RCALL + PUSH 0 sequences but limits the > number of RCALLs to 3. > > The PR has some discussion on size vs. speed consideration w.r. to using > RCALL in prologues, and following that I picked the rather arbitrary upper > bound of 3 RCALLs. The prior maximal frame size opt to such sequences was 6 > which also never produced more than 3 RCALLs. > > Ok for trunk? > > > Johann > > gcc/ > PR target/60300 > * config/avr/constraints.md (Csp): Widen range to [-11..6]. > * config/avr/avr.c (avr_prologue_setup_frame): Limit number > of RCALLs in prologue to 3.
Approved.
