[dpdk-dev] [PATCH] acl: fix build issue with some arm64 compiler
Michael Santana Francisco
msantana at redhat.com
Thu Jun 6 17:55:12 CEST 2019
On 6/6/19 10:50 AM, jerinj at marvell.com wrote:
> From: Jerin Jacob <jerinj at marvell.com>
>
> Some compilers reporting the following error, though the existing
> code doesn't have any uninitialized variable case.
> Just to make compiler happy, initialize the int32x4_t variable
> one shot in C language.
>
> ../lib/librte_acl/acl_run_neon.h: In function 'search_neon_4'
> ../lib/librte_acl/acl_run_neon.h:230:12: error: 'input' may be
> used uninitialized in this function [-Werror=maybe-uninitialized]
> int32x4_t input;
>
> Fixes: 34fa6c27c156 ("acl: add NEON optimization for ARMv8")
> Cc: stable at dpdk.org
>
> Signed-off-by: Jerin Jacob <jerinj at marvell.com>
> ---
> lib/librte_acl/acl_run_neon.h | 29 ++++++++++++-----------------
> 1 file changed, 12 insertions(+), 17 deletions(-)
>
> diff --git a/lib/librte_acl/acl_run_neon.h b/lib/librte_acl/acl_run_neon.h
> index 01b9766d8..dc9e9efe9 100644
> --- a/lib/librte_acl/acl_run_neon.h
> +++ b/lib/librte_acl/acl_run_neon.h
> @@ -165,7 +165,6 @@ search_neon_8(const struct rte_acl_ctx *ctx, const uint8_t **data,
> uint64_t index_array[8];
> struct completion cmplt[8];
> struct parms parms[8];
> - int32x4_t input0, input1;
>
> acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results,
> total_packets, categories, ctx->trans_table);
> @@ -181,17 +180,14 @@ search_neon_8(const struct rte_acl_ctx *ctx, const uint8_t **data,
>
> while (flows.started > 0) {
> /* Gather 4 bytes of input data for each stream. */
> - input0 = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 0), input0, 0);
> - input1 = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 4), input1, 0);
> -
> - input0 = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 1), input0, 1);
> - input1 = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 5), input1, 1);
> -
> - input0 = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 2), input0, 2);
> - input1 = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 6), input1, 2);
> -
> - input0 = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 3), input0, 3);
> - input1 = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 7), input1, 3);
> + int32x4_t input0 = {GET_NEXT_4BYTES(parms, 0),
> + GET_NEXT_4BYTES(parms, 1),
> + GET_NEXT_4BYTES(parms, 2),
> + GET_NEXT_4BYTES(parms, 3)};
> + int32x4_t input1 = {GET_NEXT_4BYTES(parms, 4),
> + GET_NEXT_4BYTES(parms, 5),
> + GET_NEXT_4BYTES(parms, 6),
> + GET_NEXT_4BYTES(parms, 7)};
>
> /* Process the 4 bytes of input on each stream. */
>
> @@ -227,7 +223,6 @@ search_neon_4(const struct rte_acl_ctx *ctx, const uint8_t **data,
> uint64_t index_array[4];
> struct completion cmplt[4];
> struct parms parms[4];
> - int32x4_t input;
>
> acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results,
> total_packets, categories, ctx->trans_table);
> @@ -242,10 +237,10 @@ search_neon_4(const struct rte_acl_ctx *ctx, const uint8_t **data,
>
> while (flows.started > 0) {
> /* Gather 4 bytes of input data for each stream. */
> - input = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 0), input, 0);
> - input = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 1), input, 1);
> - input = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 2), input, 2);
> - input = vsetq_lane_s32(GET_NEXT_4BYTES(parms, 3), input, 3);
> + int32x4_t input = {GET_NEXT_4BYTES(parms, 0),
> + GET_NEXT_4BYTES(parms, 1),
> + GET_NEXT_4BYTES(parms, 2),
> + GET_NEXT_4BYTES(parms, 3)};
>
> /* Process the 4 bytes of input on each stream. */
> input = transition4(input, flows.trans, index_array);
Fixed on travis: https://travis-ci.com/Maickii/dpdk-2/builds/114612090
Acked-by: Michael Santana <msantana at redhat.com>
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