[PATCH: ARM] PR 45335 Use ldrd and strd to access two consecutive words

Richard Earnshaw rearnsha@arm.com
Tue Jan 11 14:51:00 GMT 2011


On Tue, 2011-01-11 at 14:19 +0000, Nick Clifton wrote:
> Hi Carrot,
> 
> >>>>>>> ChangeLog:
> >>>>>>> 2010-10-16  Wei Guozhi<carrot@google.com>
> >>>>>>>
> >>>>>>>         PR target/45335
> >>>>>>>         * gcc/config/arm/thumb2.md (thumb2_ldrd, thumb2_ldrd_reg1,
> >>>>>>>         thumb2_ldrd_reg2 and peephole2): New insn pattern and related
> >>>>>>>         peephole2.
> >>>>>>>         (thumb2_strd, thumb2_strd_reg1, thumb2_strd_reg2 and peephole2):
> >>>>>>>         New insn pattern and related peephole2.
> >>>>>>>         * gcc/config/arm/arm.c (thumb2_legitimate_ldrd_p): New function.
> >>>>>>>         (thumb2_check_ldrd_operands): New function.
> >>>>>>>         (thumb2_prefer_ldmstm): New function.
> >>>>>>>         * gcc/config/arm/arm-protos.h (thumb2_legitimate_ldrd_p): New prototype.
> >>>>>>>         (thumb2_check_ldrd_operands): New prototype.
> >>>>>>>         (thumb2_prefer_ldmstm): New prototype.
> >>>>>>>         * gcc/config/arm/ldmstm.md (ldm2_ia, stm2_ia, ldm2_db, stm2_db):
> >>>>>>>         Change the ldm/stm patterns with 2 words to ARM only.
> 
> Approved - please apply.
> 

No, this is not yet ready.  It certainly isn't ready to go in this late
in gcc-4.6, which is now in regression-only fixes stage.

Sorry, I still think this needs more work, but I'm dashing off to yet
another meeting right now.

R.

> Happy New Year!
> 
> Cheers
>    Nick
> 
> 
> 




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