Hello!
> New patch to avoid LCP stalls based on feedback from earlier patch. I modified
> H.J.'s old patch to perform the peephole2 to split immediate moves to HImode
> memory. This is now enabled for Core2, Corei7 and Generic.
> 2012-04-04 Teresa Johnson <tejohn...@google.com>
>
> * config/i386/i386.h (ix86_tune_indices): Add
> X86_TUNE_LCP_STALL.
> * config/i386/i386.md (move immediate to memory peephole2):
> Add cases for HImode move when LCP stall avoidance is needed.
> * config/i386/i386.c (initial_ix86_tune_features): Initialize
> X86_TUNE_LCP_STALL entry.
"optimize_insn_for_speed_p ()
- && !TARGET_USE_MOV0
- && TARGET_SPLIT_LONG_MOVES
- && get_attr_length (insn) >= ix86_cur_cost ()->large_insn
+ && ((TARGET_LCP_STALL
+ && GET_MODE (operands[0]) == HImode)
+ || (!TARGET_USE_MOV0
+ && TARGET_SPLIT_LONG_MOVES
+ && get_attr_length (insn) >= ix86_cur_cost ()->large_insn))
Please change added condition to:
&& ((<MODE>mode == HImode
&& TARGET_LCP_STALL)
|| (...))
Please also add H.J. as co-author of this change to ChangeLog.
OK with these changes.
Thanks,
Uros.
