On 17/09/13 03:16, bin.cheng wrote:
>
>
>> -Original Message-
>> From: Richard Earnshaw
>> Sent: Thursday, September 12, 2013 11:24 PM
>> To: Bin Cheng
>> Cc: gcc-patches@gcc.gnu.org
>> Subject: Re: [PATCH ARM]Extend thumb1_reorg to save more co
> -Original Message-
> From: Richard Earnshaw
> Sent: Thursday, September 12, 2013 11:24 PM
> To: Bin Cheng
> Cc: gcc-patches@gcc.gnu.org
> Subject: Re: [PATCH ARM]Extend thumb1_reorg to save more comparison
> instructions
>
> On 18/04/13 06:34, Bin Cheng wrot
On 18/04/13 06:34, Bin Cheng wrote:
> Hi,
> Before thumb1_reorg, ARM backend uses peephole to save comparison
> instructions when a flag setting move is found before branch instruction.
> Since we are using thumb1_reog now, it can be extended to catch more
> opportunities by searching flag setting
> I haven't looked at compare-elim, but probably not. Thumb1 doesn't use
> cc[0] and doesn't expose flag setting instructions in a MI manner (since
> add instructions clobber the flags).
compare-elim is supposed to be designed for this kind of targets, but of
course you need to split the instruc
> -Original Message-
> From: Richard Earnshaw
> Sent: Thursday, April 18, 2013 5:25 PM
> To: Steven Bosscher
> Cc: Bin Cheng; gcc-patches@gcc.gnu.org
> Subject: Re: [PATCH ARM]Extend thumb1_reorg to save more comparison
> instructions
>
> On 18/04/13 09:20, St
On 18/04/13 09:20, Steven Bosscher wrote:
On Thu, Apr 18, 2013 at 7:34 AM, Bin Cheng wrote:
Hi,
Before thumb1_reorg, ARM backend uses peephole to save comparison
instructions when a flag setting move is found before branch instruction.
Since we are using thumb1_reog now, it can be extended to ca
On Thu, Apr 18, 2013 at 7:34 AM, Bin Cheng wrote:
> Hi,
> Before thumb1_reorg, ARM backend uses peephole to save comparison
> instructions when a flag setting move is found before branch instruction.
> Since we are using thumb1_reog now, it can be extended to catch more
> opportunities by searching
