> -Original Message-
> From: Ramana Radhakrishnan
> Sent: Thursday, April 11, 2013 4:40 PM
> To: Joey Ye
> Cc: gcc-patches@gcc.gnu.org
> Subject: Re: [PATCH][ARM][thumb1] Reduce lr save for leaf function with
> non-far jump
>
> On 12/20/12 09:53, Joey Ye wr
On 12/20/12 09:53, Joey Ye wrote:
Current GCC thumb1 has an annoying problem that always assuming far branch.
So it forces to save lr, even when unnecessarily. The most extreme case
complained by partner is:
// compiled with "-mthumb -mcpu=cortex-m0 -Os".
void foo() { for (;;); }
=>
foo:
Ping ^ 2
> -Original Message-
> From: Joey Ye
> Sent: Saturday, January 05, 2013 3:41 PM
> To: Ramana Radhakrishnan
> Cc: Joey Ye; gcc-patches@gcc.gnu.org
> Subject: RE: [PATCH][ARM][thumb1] Reduce lr save for leaf function with
> non-far jump
>
> Ping
&
Ping^2
> -Original Message-
> From: Joey Ye
> Sent: Saturday, January 05, 2013 15:41
> To: Ramana Radhakrishnan
> Cc: Joey Ye; gcc-patches@gcc.gnu.org
> Subject: RE: [PATCH][ARM][thumb1] Reduce lr save for leaf function with
> non-far jump
>
> Ping
&
Ping
> -Original Message-
> From: Joey Ye
> Sent: Thursday, December 20, 2012 17:53
> To: gcc-patches@gcc.gnu.org; Ramana Radhakrishnan
> Cc: Joey Ye
> Subject: [PATCH][ARM][thumb1] Reduce lr save for leaf function with non-
> far jump
>
> Current GCC thumb1 h
Current GCC thumb1 has an annoying problem that always assuming far branch.
So it forces to save lr, even when unnecessarily. The most extreme case
complained by partner is:
// compiled with "-mthumb -mcpu=cortex-m0 -Os".
void foo() { for (;;); }
=>
foo:
push{lr} // Crazy!!!
.L2:
Current GCC thumb1 has an annoying problem that always assuming far branch.
So it forces to save lr, even when unnecessarily. The most extreme case
complained by partner is:
// compiled with "-mthumb -mcpu=cortex-m0 -Os".
void foo() { for (;;); }
=>
foo:
push{lr} // Crazy!!!
.L2:
