On Mon, 2011-04-18 at 22:17 +0800, Carrot Wei wrote:
> On Mon, Apr 18, 2011 at 9:33 PM, Richard Earnshaw <rearn...@arm.com> wrote:
> >
> > On Sat, 2011-04-16 at 12:34 +0800, Carrot Wei wrote:
> >> Hi Richard
> >>
> >> Thank you for the detailed explanation. It sounds like an inherent
> >> difficulty of rtl passes. Then the only opportunity is ldrb/strb
> >> instructions because they never affect cc registers.
> >
> > There are also some comparison operations that are also known to be 2
> > bytes (because they are known to set the condition codes).  But yes, the
> > scope here is quite limited.
> >
> > R.
> 
> So now this version only computes the correct length of ldrd/strb in insn
> arm_movqi_insn. Tested on arm qemu without regression.
> 
> thanks
> Carrot
> 
> 
> ChangeLog:
> 2011-04-18  Wei Guozhi  <car...@google.com>
> 
>         PR target/47855
>         * config/arm/arm-protos.h (thumb1_legitimate_address_p): New 
> prototype.
>         * config/arm/arm.c (thumb1_legitimate_address_p): Remove the static
>         linkage.
>         * config/arm/constraints.md (Uu): New constraint.
>         * config/arm/arm.md (*arm_movqi_insn): Compute attr "length".


OK.

R.


Reply via email to