Caught in OBS for Fedora Rawhide on aarch64:
[ 198s] In file included from ../lib/acl/acl_run_neon.h:7,
[ 198s] from ../lib/acl/acl_run_neon.c:5:
[ 198s] In function ‘alloc_completion’,
[ 198s] inlined from ‘acl_start_next_trie’ at
../lib/acl/acl_run.h:140:24,
[ 198s] inlined from ‘search_neon_4.isra’ at
../lib/acl/acl_run_neon.h:239:20:
[ 198s] ../lib/acl/acl_run.h:93:25: error: ‘cmplt’ may be used
uninitialized [-Werror=maybe-uninitialized]
[ 198s] 93 | if (p[n].count == 0) {
[ 198s] | ~~~~^~~~~~
[ 198s] ../lib/acl/acl_run_neon.h: In function ‘search_neon_4.isra’:
[ 198s] ../lib/acl/acl_run_neon.h:230:27: note: ‘cmplt’ declared here
[ 198s] 230 | struct completion cmplt[4];
[ 198s] | ^~~~~
The code was resetting sequentially cmpl[].count at the exact index that
later call to alloc_completion uses.
While this code seems correct, GCC 15 does not understand this (probably
when applying some optimisations).
Instead, reset cmpl[].count all at once in acl_set_flow, and cleanup the
various vectorized implementations accordingly.
Bugzilla ID: 1678
Cc: sta...@dpdk.org
Signed-off-by: David Marchand <david.march...@redhat.com>
---
lib/acl/acl_run.h | 5 +++++
lib/acl/acl_run_altivec.h | 8 ++------
lib/acl/acl_run_avx2.h | 4 +---
lib/acl/acl_run_neon.h | 8 ++------
lib/acl/acl_run_scalar.c | 4 +---
lib/acl/acl_run_sse.h | 8 ++------
6 files changed, 13 insertions(+), 24 deletions(-)
diff --git a/lib/acl/acl_run.h b/lib/acl/acl_run.h
index 7f092413cd..9fd3e60021 100644
--- a/lib/acl/acl_run.h
+++ b/lib/acl/acl_run.h
@@ -176,6 +176,8 @@ acl_set_flow(struct acl_flow_data *flows, struct completion
*cmplt,
uint32_t cmplt_size, const uint8_t **data, uint32_t *results,
uint32_t data_num, uint32_t categories, const uint64_t *trans)
{
+ unsigned int i;
+
flows->num_packets = 0;
flows->started = 0;
flows->trie = 0;
@@ -187,6 +189,9 @@ acl_set_flow(struct acl_flow_data *flows, struct completion
*cmplt,
flows->data = data;
flows->results = results;
flows->trans = trans;
+
+ for (i = 0; i < cmplt_size; i++)
+ cmplt[i].count = 0;
}
typedef void (*resolve_priority_t)
diff --git a/lib/acl/acl_run_altivec.h b/lib/acl/acl_run_altivec.h
index 2d398ffded..d5ccdb94f0 100644
--- a/lib/acl/acl_run_altivec.h
+++ b/lib/acl/acl_run_altivec.h
@@ -199,10 +199,8 @@ search_altivec_8(const struct rte_acl_ctx *ctx, const
uint8_t **data,
acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results,
total_packets, categories, ctx->trans_table);
- for (n = 0; n < MAX_SEARCHES_ALTIVEC8; n++) {
- cmplt[n].count = 0;
+ for (n = 0; n < MAX_SEARCHES_ALTIVEC8; n++)
index_array[n] = acl_start_next_trie(&flows, parms, n, ctx);
- }
/* Check for any matches. */
acl_match_check_x4(0, ctx, parms, &flows, (uint64_t *)&index_array[0]);
@@ -270,10 +268,8 @@ search_altivec_4(const struct rte_acl_ctx *ctx, const
uint8_t **data,
acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results,
total_packets, categories, ctx->trans_table);
- for (n = 0; n < MAX_SEARCHES_ALTIVEC4; n++) {
- cmplt[n].count = 0;
+ for (n = 0; n < MAX_SEARCHES_ALTIVEC4; n++)
index_array[n] = acl_start_next_trie(&flows, parms, n, ctx);
- }
/* Check for any matches. */
acl_match_check_x4(0, ctx, parms, &flows, index_array);
diff --git a/lib/acl/acl_run_avx2.h b/lib/acl/acl_run_avx2.h
index 0b8967f22e..e069fb85b2 100644
--- a/lib/acl/acl_run_avx2.h
+++ b/lib/acl/acl_run_avx2.h
@@ -171,10 +171,8 @@ search_avx2x16(const struct rte_acl_ctx *ctx, const
uint8_t **data,
acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results,
total_packets, categories, ctx->trans_table);
- for (n = 0; n < RTE_DIM(cmplt); n++) {
- cmplt[n].count = 0;
+ for (n = 0; n < RTE_DIM(cmplt); n++)
index_array[n] = acl_start_next_trie(&flows, parms, n, ctx);
- }
t0 = _mm256_set_epi64x(index_array[5], index_array[4],
index_array[1], index_array[0]);
diff --git a/lib/acl/acl_run_neon.h b/lib/acl/acl_run_neon.h
index 63074f871d..3b9bd0cc39 100644
--- a/lib/acl/acl_run_neon.h
+++ b/lib/acl/acl_run_neon.h
@@ -172,10 +172,8 @@ search_neon_8(const struct rte_acl_ctx *ctx, const uint8_t
**data,
acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results,
total_packets, categories, ctx->trans_table);
- for (n = 0; n < 8; n++) {
- cmplt[n].count = 0;
+ for (n = 0; n < 8; n++)
index_array[n] = acl_start_next_trie(&flows, parms, n, ctx);
- }
/* Check for any matches. */
acl_match_check_x4(0, ctx, parms, &flows, &index_array[0]);
@@ -234,10 +232,8 @@ search_neon_4(const struct rte_acl_ctx *ctx, const uint8_t
**data,
acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results,
total_packets, categories, ctx->trans_table);
- for (n = 0; n < 4; n++) {
- cmplt[n].count = 0;
+ for (n = 0; n < 4; n++)
index_array[n] = acl_start_next_trie(&flows, parms, n, ctx);
- }
/* Check for any matches. */
acl_match_check_x4(0, ctx, parms, &flows, index_array);
diff --git a/lib/acl/acl_run_scalar.c b/lib/acl/acl_run_scalar.c
index 3d61e79409..a3661b1b6b 100644
--- a/lib/acl/acl_run_scalar.c
+++ b/lib/acl/acl_run_scalar.c
@@ -121,10 +121,8 @@ rte_acl_classify_scalar(const struct rte_acl_ctx *ctx,
const uint8_t **data,
acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results, num,
categories, ctx->trans_table);
- for (n = 0; n < MAX_SEARCHES_SCALAR; n++) {
- cmplt[n].count = 0;
+ for (n = 0; n < MAX_SEARCHES_SCALAR; n++)
index_array[n] = acl_start_next_trie(&flows, parms, n, ctx);
- }
transition0 = index_array[0];
transition1 = index_array[1];
diff --git a/lib/acl/acl_run_sse.h b/lib/acl/acl_run_sse.h
index 93286a2c38..4ec819a215 100644
--- a/lib/acl/acl_run_sse.h
+++ b/lib/acl/acl_run_sse.h
@@ -205,10 +205,8 @@ search_sse_8(const struct rte_acl_ctx *ctx, const uint8_t
**data,
acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results,
total_packets, categories, ctx->trans_table);
- for (n = 0; n < MAX_SEARCHES_SSE8; n++) {
- cmplt[n].count = 0;
+ for (n = 0; n < MAX_SEARCHES_SSE8; n++)
index_array[n] = acl_start_next_trie(&flows, parms, n, ctx);
- }
/*
* indices1 contains index_array[0,1]
@@ -293,10 +291,8 @@ search_sse_4(const struct rte_acl_ctx *ctx, const uint8_t
**data,
acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results,
total_packets, categories, ctx->trans_table);
- for (n = 0; n < MAX_SEARCHES_SSE4; n++) {
- cmplt[n].count = 0;
+ for (n = 0; n < MAX_SEARCHES_SSE4; n++)
index_array[n] = acl_start_next_trie(&flows, parms, n, ctx);
- }
indices1 = _mm_loadu_si128((xmm_t *) &index_array[0]);
indices2 = _mm_loadu_si128((xmm_t *) &index_array[2]);
--
2.48.1
