2011/10/27 Georg-Johann Lay <a...@gjlay.de>: > This is support of a new option -maccumulate-args that implements > ACCUMULATE_OUTGOING_ARGS as proposed by Richard. > > As 4.7 will be released very soon, I'd like to supply the documentation part > later and use the remaining stage I time for extension/improvements. > > The tests ran 4 times with either combination of > -m[no-]call-prologues > -m[no-]accumulate-args > > The results for the C testsuite are: > > -maccumulate-args > PASS -> FAIL > gcc.dg/compat/struct-by-value-16a > gcc.dg/compat/struct-by-value-17a > gcc.dg/compat/struct-by-value-18a > > -maccumulate-args > -mcall-prologues > PASS -> FAIL > gcc.dg/compat/struct-by-value-16a > gcc.dg/compat/struct-by-value-17a > gcc.dg/compat/struct-by-value-18a > gcc.dg/sibcall-3.c > gcc.dg/sibcall-4.c > > FAIL -> PASS > gcc.dg/torture/pta-ptrarith-3.c > > -mcall-prologues > PASS -> FAIL > gcc.dg/sibcall-3.c > gcc.dg/sibcall-4.c > > FAIL -> PASS > gcc.dg/torture/pta-ptrarith-3.c > > All FAILs runtime fails. > - struct-by-value-* use extrem RAM (overflow) > - sibcall-* fail because that optimization is off > with -mcall-prologues > - the FAILs of pta-ptrarith-3 are PR50063. > > There are no changes in the C++ testsuite. > > Ok for trunk? > > Johann > > * config/avr/avr.opt (-maccumulate-args): New option. > * config/avr/avr.h (STARTING_FRAME_OFFSET): Redefine to > avr_starting_frame_offset. > (ACCUMULATE_OUTGOING_ARGS): Define to avr_accumulate_outgoing_args. > * config/avr/avr.md (UNSPECV_WRITE_SP_IRQ_ON): Remove. > (UNSPECV_WRITE_SP_IRQ_OFF): Remove. > (UNSPECV_WRITE_SP): New constant. > (*addhi3_sp_R): Rewrite to... > (*addhi3_sp): ...this new insn. > (movhi_sp_r_irq_off, movhi_sp_r_irq_on): Combine to... > (movhi_sp_r): ...this new insn. > * config/avr/avr-protos.h (avr_accumulate_outgoing_args): New. > (avr_starting_frame_offset): New. > * config/avr/avr.c (avr_accumulate_outgoing_args): New function. > (avr_starting_frame_offset): New function. > (avr_outgoing_args_size): New static function. > (avr_initial_elimination_offset): Use it. > (avr_simple_epilogue): Use it. > (avr_asm_function_end_prologue): Use it. > (expand_epilogue): Use it. > (expand_prologue): Use it. Break out code to... > (avr_prologue_setup_frame): ...this new static function. > (avr_can_eliminate): Allow eliminating to frame pointer if there > is one. > (avr_frame_pointer_required_p): Use frame pointer if target has a > nonlocal label. > * config/avr/constraints.md (Csp): New constraint. > * config/avr/predicates.md (avr_sp_immediate_operand): Use it. >
Please commit. Denis.
