[Beignet] [PATCH] backend: improve add zero pattern

[Yang, Rong R]

After remove negation check, the function name doNegAddOptimization is not suitable.
Can you also change function name and the comment?

> -----Original Message-----
> From: Beignet [mailto:beignet-bounces at lists.freedesktop.org] On Behalf Of
> rander.wang
> Sent: Friday, June 23, 2017 15:37
> To: beignet at freedesktop.org
> Cc: Wang, Rander <rander.wang at intel.com>
> Subject: [Beignet] [PATCH] backend: improve add zero pattern
> 
> 	remove the negation check for adding zero.
> 	it also can be applied this optimization
> 
> Signed-off-by: rander.wang <rander.wang at intel.com>
> ---
>  backend/src/backend/gen_insn_selection_optimize.cpp | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/backend/src/backend/gen_insn_selection_optimize.cpp
> b/backend/src/backend/gen_insn_selection_optimize.cpp
> index 1020b7f..3b76817 100644
> --- a/backend/src/backend/gen_insn_selection_optimize.cpp
> +++ b/backend/src/backend/gen_insn_selection_optimize.cpp
> @@ -307,8 +307,8 @@ namespace gbe
>      if (insn.opcode == SEL_OP_ADD) {
>        GenRegister src0 = insn.src(0);
>        GenRegister src1 = insn.src(1);
> -      if ((src0.negation && src1.file == GEN_IMMEDIATE_VALUE &&
> src1.value.f == 0.0f) ||
> -          (src1.negation && src0.file == GEN_IMMEDIATE_VALUE && src0.value.f
> == 0.0f))
> +      if ((src1.file == GEN_IMMEDIATE_VALUE && src1.value.f == 0.0f) ||
> +          (src0.file == GEN_IMMEDIATE_VALUE && src0.value.f == 0.0f))
>          addToReplaceInfoMap(insn);
>      }
>    }
> --
> 2.7.4
> 
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