| Message ID | 000401ce3b6d$313d2d50$93b787f0$@yorsh@arm.com |
|---|---|
| State | New |
| Headers | show |
On 17/04/13 14:12, Greta Yorsh wrote: > Currently, epilogue is not generated in RTL for function that can return > using a single instruction. This patch enables RTL epilogue for such > functions on targets that can benefit from using a sequence of LDRD > instructions in epilogue instead of a single LDM instruction. > > No regression on qemu arm-none-eabi with cortex-a15. > > Ok for trunk? > > Thanks, > Greta > > gcc/ > > 2012-10-19 Greta Yorsh <Greta.Yorsh at arm.com> > > * config/arm/arm.c (use_return_insn): Return 0 for targets that > can benefit from using a sequence of LDRD instructions in epilogue > instead of a single LDM instruction. > OK. R.
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 866385c..bca92af 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -2296,6 +2296,10 @@ use_return_insn (int iscond, rtx sibling) if (IS_INTERRUPT (func_type) && (frame_pointer_needed || TARGET_THUMB)) return 0; + if (TARGET_LDRD && current_tune->prefer_ldrd_strd + && !optimize_function_for_size_p (cfun)) + return 0; + offsets = arm_get_frame_offsets (); stack_adjust = offsets->outgoing_args - offsets->saved_regs;
Currently, epilogue is not generated in RTL for function that can return using a single instruction. This patch enables RTL epilogue for such functions on targets that can benefit from using a sequence of LDRD instructions in epilogue instead of a single LDM instruction. No regression on qemu arm-none-eabi with cortex-a15. Ok for trunk? Thanks, Greta gcc/ 2012-10-19 Greta Yorsh <Greta.Yorsh at arm.com> * config/arm/arm.c (use_return_insn): Return 0 for targets that can benefit from using a sequence of LDRD instructions in epilogue instead of a single LDM instruction.