[PATCH v12 19/21] test: remove use of VLAs for Windows built code in bitset tests

[Andre Muezerie <andremue@linux.microsoft.com>]

1) MSVC does not support VLAs. Use standard fixed C arrays of
maximum size required instead.

2) ../usr/lib/gcc/x86_64-redhat-linux/13/include/emmintrin.h:742:8:
    error: array subscript 9 is outside array bounds of 'uint64_t[16]'
    {aka 'long unsigned int[16]'} [-Werror=array-bounds=]
   3695 742 | *__P = __B;

Compile with -Wno-array-bounds to avoid false positives when
using gcc version 11 or newer (gcc compiler bug/limitation).

Signed-off-by: Andre Muezerie <andremue@linux.microsoft.com>
---
 app/test/test_bitset.c          | 69 ++++++++++++++++++++-------------
 app/test/test_lcore_var_perf.c  |  2 +-
 app/test/test_reassembly_perf.c |  4 +-
 3 files changed, 46 insertions(+), 29 deletions(-)

diff --git a/app/test/test_bitset.c b/app/test/test_bitset.c
index 50b8bf0da4..45460204c1 100644
--- a/app/test/test_bitset.c
+++ b/app/test/test_bitset.c
@@ -99,11 +99,13 @@ typedef void clear_fun(uint64_t *bitset, size_t bit_num);
 typedef void assign_fun(uint64_t *bitset, size_t bit_num, bool value);
 typedef void flip_fun(uint64_t *bitset, size_t bit_num);
 
+#define RAND_SET_MAX_SIZE 1000
+
 static int
 test_set_clear_size(test_fun test_fun, set_fun set_fun, clear_fun clear_fun, size_t size)
 {
 	size_t i;
-	bool reference[size];
+	bool reference[RAND_SET_MAX_SIZE];
 	uint64_t *bitset;
 
 	rand_bool_ary(reference, size);
@@ -131,8 +133,7 @@ test_set_clear_size(test_fun test_fun, set_fun set_fun, clear_fun clear_fun, siz
 	return TEST_SUCCESS;
 }
 
-#define RAND_ITERATIONS (10000)
-#define RAND_SET_MAX_SIZE (1000)
+#define RAND_ITERATIONS 10000
 
 static int
 test_set_clear_fun(test_fun test_fun, set_fun set_fun, clear_fun clear_fun)
@@ -168,10 +169,20 @@ test_flip_size(test_fun test_fun, assign_fun assign_fun, flip_fun flip_fun, size
 	rand_bitset(bitset, size);
 
 	for (i = 0; i < size; i++) {
-		RTE_BITSET_DECLARE(reference, size);
+		RTE_BITSET_DECLARE(reference, RAND_SET_MAX_SIZE);
+
+#if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION >= 110000)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Warray-bounds"
+#endif
 
+		/* gcc is giving false positives here when code is optimized */
 		rte_bitset_copy(reference, bitset, size);
 
+#if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION >= 110000)
+#pragma GCC diagnostic pop
+#endif
+
 		bool value = test_fun(bitset, i);
 
 		flip_fun(bitset, i);
@@ -282,13 +293,13 @@ find_clear(const bool *ary, size_t num_bools, size_t start, size_t len)
 	return find(ary, num_bools, start, len, false);
 }
 
-#define FFS_ITERATIONS (100)
+#define FFS_ITERATIONS 100
 
 static int
 test_find_size(size_t size, bool set)
 {
 	uint64_t *bitset;
-	bool reference[size];
+	bool reference[RAND_SET_MAX_SIZE];
 	size_t i;
 
 	bitset = alloc_bitset(size);
@@ -388,8 +399,8 @@ record_match(ssize_t match_idx, size_t size, int *calls)
 static int
 test_foreach_size(ssize_t size, bool may_wrap, bool set)
 {
-	bool reference[size];
-	int calls[size];
+	bool reference[RAND_SET_MAX_SIZE];
+	int calls[RAND_SET_MAX_SIZE];
 	uint64_t *bitset;
 	ssize_t i;
 	ssize_t start_bit;
@@ -633,17 +644,19 @@ test_define(void)
 typedef void bitset_op(uint64_t *dst, const uint64_t *a, const uint64_t *b, size_t bit_num);
 typedef bool bool_op(bool a, bool b);
 
+#define LOGIC_MAX_SET_SIZE 200
+
 static int
 test_logic_op(bitset_op bitset_op, bool_op bool_op)
 {
-	const size_t size = 1 + rte_rand_max(200);
-	RTE_BITSET_DECLARE(bitset_a, size);
-	RTE_BITSET_DECLARE(bitset_b, size);
-	RTE_BITSET_DECLARE(bitset_d, size);
+	const size_t size = 1 + rte_rand_max(LOGIC_MAX_SET_SIZE);
+	RTE_BITSET_DECLARE(bitset_a, LOGIC_MAX_SET_SIZE);
+	RTE_BITSET_DECLARE(bitset_b, LOGIC_MAX_SET_SIZE);
+	RTE_BITSET_DECLARE(bitset_d, LOGIC_MAX_SET_SIZE);
 
-	bool ary_a[size];
-	bool ary_b[size];
-	bool ary_d[size];
+	bool ary_a[LOGIC_MAX_SET_SIZE];
+	bool ary_b[LOGIC_MAX_SET_SIZE];
+	bool ary_d[LOGIC_MAX_SET_SIZE];
 
 	rand_bool_ary(ary_a, size);
 	rand_bool_ary(ary_b, size);
@@ -708,14 +721,14 @@ test_complement(void)
 	for (i = 0; i < RAND_ITERATIONS; i++) {
 		const size_t size = 1 + rte_rand_max(RAND_SET_MAX_SIZE - 1);
 
-		RTE_BITSET_DECLARE(src, size);
+		RTE_BITSET_DECLARE(src, RAND_SET_MAX_SIZE);
 
 		rand_bitset(src, size);
 
 		bool bit_idx = rte_rand_max(size);
 		bool bit_value = rte_bitset_test(src, bit_idx);
 
-		RTE_BITSET_DECLARE(dst, size);
+		RTE_BITSET_DECLARE(dst, RAND_SET_MAX_SIZE);
 
 		rte_bitset_complement(dst, src, size);
 
@@ -726,6 +739,8 @@ test_complement(void)
 	return TEST_SUCCESS;
 }
 
+#define SHIFT_SET_MAX_SIZE 500
+
 static int
 test_shift(bool right)
 {
@@ -734,12 +749,12 @@ test_shift(bool right)
 	const char *direction = right ? "right" : "left";
 
 	for (i = 0; i < 10000; i++) {
-		const int size = 1 + (int)rte_rand_max(500);
+		const int size = 1 + (int)rte_rand_max(SHIFT_SET_MAX_SIZE);
 		const int shift_count = (int)rte_rand_max(1.5 * size);
 		int src_idx;
 
-		RTE_BITSET_DECLARE(src, size);
-		RTE_BITSET_DECLARE(reference, size);
+		RTE_BITSET_DECLARE(src, SHIFT_SET_MAX_SIZE);
+		RTE_BITSET_DECLARE(reference, SHIFT_SET_MAX_SIZE);
 
 		rte_bitset_init(src, size);
 		rte_bitset_init(reference, size);
@@ -788,12 +803,14 @@ test_shift_left(void)
 	return test_shift(false);
 }
 
+#define EQUAL_SET_MAX_SIZE 100
+
 static int
 test_equal(void)
 {
-	const size_t size = 100;
-	RTE_BITSET_DECLARE(bitset_a, size);
-	RTE_BITSET_DECLARE(bitset_b, size);
+	const size_t size = EQUAL_SET_MAX_SIZE;
+	RTE_BITSET_DECLARE(bitset_a, EQUAL_SET_MAX_SIZE);
+	RTE_BITSET_DECLARE(bitset_b, EQUAL_SET_MAX_SIZE);
 
 	rand_buf(bitset_a, RTE_BITSET_SIZE(size));
 	rand_buf(bitset_b, RTE_BITSET_SIZE(size));
@@ -821,9 +838,9 @@ test_equal(void)
 static int
 test_copy(void)
 {
-	const size_t size = 100;
-	RTE_BITSET_DECLARE(bitset_a, size);
-	RTE_BITSET_DECLARE(bitset_b, size);
+	const size_t size = EQUAL_SET_MAX_SIZE;
+	RTE_BITSET_DECLARE(bitset_a, EQUAL_SET_MAX_SIZE);
+	RTE_BITSET_DECLARE(bitset_b, EQUAL_SET_MAX_SIZE);
 
 	rand_buf(bitset_a, RTE_BITSET_SIZE(size));
 	rand_buf(bitset_b, RTE_BITSET_SIZE(size));
diff --git a/app/test/test_lcore_var_perf.c b/app/test/test_lcore_var_perf.c
index 41e29bbd49..5a74ce4808 100644
--- a/app/test/test_lcore_var_perf.c
+++ b/app/test/test_lcore_var_perf.c
@@ -185,7 +185,7 @@ test_lcore_var_access_n(unsigned int num_mods)
 	double tls_latency;
 	double lazy_tls_latency;
 	double lvar_latency;
-	unsigned int mods[num_mods];
+	unsigned int mods[MAX_MODS];
 	unsigned int i;
 
 	for (i = 0; i < num_mods; i++)
diff --git a/app/test/test_reassembly_perf.c b/app/test/test_reassembly_perf.c
index 69cf029468..ac225e2b53 100644
--- a/app/test/test_reassembly_perf.c
+++ b/app/test/test_reassembly_perf.c
@@ -577,7 +577,7 @@ ipv4_reassembly_interleaved_flows_perf(uint8_t nb_frags)
 		for (j = 0; j < 4; j++)
 			nb_frags += frag_per_flow[i + j];
 
-		struct rte_mbuf *buf_arr[nb_frags];
+		struct rte_mbuf *buf_arr[MAX_FRAGMENTS];
 		for (j = 0; j < 4; j++) {
 			join_array(buf_arr, mbufs[i + j], prev,
 				   frag_per_flow[i + j]);
@@ -788,7 +788,7 @@ ipv6_reassembly_interleaved_flows_perf(int8_t nb_frags)
 		for (j = 0; j < 4; j++)
 			nb_frags += frag_per_flow[i + j];
 
-		struct rte_mbuf *buf_arr[nb_frags];
+		struct rte_mbuf *buf_arr[MAX_FRAGMENTS];
 		for (j = 0; j < 4; j++) {
 			join_array(buf_arr, mbufs[i + j], prev,
 				   frag_per_flow[i + j]);
-- 
2.47.0.vfs.0.3