> -Original Message-
> From: H.J. Lu [mailto:hjl.to...@gmail.com]
> Sent: Friday, November 28, 2014 10:45 PM
> To: Zhenqiang Chen
> Cc: Richard Henderson; GCC Patches
> Subject: Re: [PATCH, ifcvt] Fix PR63917
>
> On Sun, Nov 23, 2014 at 7:47 PM,
On Sun, Nov 23, 2014 at 7:47 PM, Zhenqiang Chen wrote:
>
>> -Original Message-
>> From: Richard Henderson [mailto:r...@redhat.com]
>> Sent: Friday, November 21, 2014 2:27 AM
>> To: Zhenqiang Chen; gcc-patches@gcc.gnu.org
>> Subject: Re: [PATCH, ifcvt] Fix
> -Original Message-
> From: Richard Henderson [mailto:r...@redhat.com]
> Sent: Friday, November 21, 2014 2:27 AM
> To: Zhenqiang Chen; gcc-patches@gcc.gnu.org
> Subject: Re: [PATCH, ifcvt] Fix PR63917
>
> On 11/20/2014 10:48 AM, Zhenqiang Chen wrote:
> > +/
On 11/20/2014 10:48 AM, Zhenqiang Chen wrote:
> +/* Check X clobber CC reg or not. */
> +
> +static bool
> +clobber_cc_p (rtx x)
> +{
> + RTX_CODE code = GET_CODE (x);
> + int i;
> +
> + if (code == CLOBBER
> + && REG_P (XEXP (x, 0))
> + && (GET_MODE_CLASS (GET_MODE (XEXP (x, 0))) ==
On Thu, Nov 20, 2014 at 1:48 AM, Zhenqiang Chen wrote:
> Hi,
>
> r217646 enhances ifcvt to handle cbranchcc4 instruction. But ifcvt does not
> strictly check the dependence before moving instructions before IF. Then
> some instructions, which clobber CC, are inserted before the cbranchcc4
> instru
