> -Original Message-
> From: Andrew Pinski [mailto:pins...@gmail.com]
> Sent: Tuesday, November 22, 2011 1:14 PM
> To: Jiangning Liu
> Cc: gcc-patches@gcc.gnu.org; Richard Guenther; Richard Henderson
> Subject: Re: [RFC] Optimization to conditional and/or in ARM back-en
On Sun, Nov 20, 2011 at 6:17 PM, Jiangning Liu wrote:
> Hi,
>
> This patch is to implement a peephole like optimization in ARM back-end.
>
> If we have an if condition expression like "((r3 != 0) & r1) != 0",
So this is the same as:
int f1(int r1, int r3)
{
if (((r3 != 0) & r1) != 0)
return
Hi,
This patch is to implement a peephole like optimization in ARM back-end.
If we have an if condition expression like "((r3 != 0) & r1) != 0",
originally the binary code to be generated is like,
cmp r3, #0
ite eq
moveq r1, #0
andne r1, r1, #1
