Re: [PATCH GCC/ARM]Fix rtx cost for Thumb1

Tue, 26 Mar 2013 03:57:36 -0700 

On 26/03/13 08:34, Bin Cheng wrote:

Hi,
As reported in PR56102, arm back end returns wrong rtx cost for pattern
SET/ASHIFT/ASHIFTRT/LSHIFTRT/ROTATERT with multi-word mode. This
causes GCC skipping the split process in lower-subreg.c, and generating
bigger constant pool.

This patch fixes the issue. Tested on arm-none-eabi/thumb1/O2/Os, ok for
trunk?

Thanks.

2013-03-26  Bin Cheng  <bin.ch...@arm.com>

        PR target/56102
        * config/arm/arm.c (thumb1_rtx_costs, thumb1_size_rtx_costs): Fix
        rtx costs for SET/ASHIFT/ASHIFTRT/LSHIFTRT/ROTATERT patterns with
        mult-word mode.



OK.

R.

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