ccv_nnc_micro.c

Bug Summary

File:	nnc/ccv_nnc_micro.c
Warning:	line 152, column 31 Array access (via field 'inputs') results in a null pointer dereference

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name ccv_nnc_micro.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -target-feature +sse2 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/home/liu/actions-runner/_work/ccv/ccv/lib/nnc -fcoverage-compilation-dir=/home/liu/actions-runner/_work/ccv/ccv/lib/nnc -resource-dir /usr/local/lib/clang/19 -I ../ -I /usr/local/cuda/include -D HAVE_CBLAS -D HAVE_LIBPNG -D HAVE_LIBJPEG -D HAVE_FFTW3 -D HAVE_PTHREAD -D HAVE_LIBLINEAR -D HAVE_TESSERACT -D HAVE_AVCODEC -D HAVE_AVFORMAT -D HAVE_AVUTIL -D HAVE_SWSCALE -D HAVE_SSE2 -D HAVE_GSL -D HAVE_CUDA -D HAVE_CUDNN -D HAVE_NCCL -D USE_SYSTEM_CUB -I /usr/local/include -internal-isystem /usr/local/lib/clang/19/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -ferror-limit 19 -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -vectorize-loops -vectorize-slp -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/liu/actions-runner/_work/ccv/ccv/_analyze/2025-11-24-190551-640673-1 -x c ccv_nnc_micro.c

1#include "ccv_nnc.h"
2#include "ccv_nnc_easy.h"
3#include "ccv_nnc_internal.h"
4#include "ccv_internal.h"
5#include "_ccv_nnc_micro.h"
6#include "3rdparty/khash/khash.h"
7 
8// MARK - Level-1 API
9 
10KHASH_MAP_INIT_STR(ccv_nnc_micro_bind_scalar, uint32_t)typedef struct kh_ccv_nnc_micro_bind_scalar_s { khint_t n_buckets
, size, n_occupied, upper_bound; khint32_t *flags; kh_cstr_t *
keys; uint32_t *vals; } kh_ccv_nnc_micro_bind_scalar_t; static
 inline __attribute__ ((__unused__)) kh_ccv_nnc_micro_bind_scalar_t
 *kh_init_ccv_nnc_micro_bind_scalar(void) { return (kh_ccv_nnc_micro_bind_scalar_t
*)calloc(1,sizeof(kh_ccv_nnc_micro_bind_scalar_t)); } static inline
 __attribute__ ((__unused__)) void kh_destroy_ccv_nnc_micro_bind_scalar
(kh_ccv_nnc_micro_bind_scalar_t *h) { if (h) { free((void *)h
->keys); free(h->flags); free((void *)h->vals); free
(h); } } static inline __attribute__ ((__unused__)) void kh_clear_ccv_nnc_micro_bind_scalar
(kh_ccv_nnc_micro_bind_scalar_t *h) { if (h && h->
flags) { memset(h->flags, 0xaa, ((h->n_buckets) < 16
? 1 : (h->n_buckets)>>4) * sizeof(khint32_t)); h->
size = h->n_occupied = 0; } } static inline __attribute__ (
(__unused__)) khint_t kh_get_ccv_nnc_micro_bind_scalar(const kh_ccv_nnc_micro_bind_scalar_t
 *h, kh_cstr_t key) { if (h->n_buckets) { khint_t k, i, last
, mask, step = 0; mask = h->n_buckets - 1; k = __ac_X31_hash_string
(key); i = k & mask; last = i; while (!((h->flags[i>>
4]>>((i&0xfU)<<1))&2) && (((h->
flags[i>>4]>>((i&0xfU)<<1))&1) || !
(strcmp(h->keys[i], key) == 0))) { i = (i + (++step)) &
 mask; if (i == last) return h->n_buckets; } return ((h->
flags[i>>4]>>((i&0xfU)<<1))&3)? h->
n_buckets : i; } else return 0; } static inline __attribute__
 ((__unused__)) int kh_resize_ccv_nnc_micro_bind_scalar(kh_ccv_nnc_micro_bind_scalar_t
 *h, khint_t new_n_buckets) { khint32_t *new_flags = 0; khint_t
 j = 1; { (--(new_n_buckets), (new_n_buckets)|=(new_n_buckets
)>>1, (new_n_buckets)|=(new_n_buckets)>>2, (new_n_buckets
)|=(new_n_buckets)>>4, (new_n_buckets)|=(new_n_buckets)
>>8, (new_n_buckets)|=(new_n_buckets)>>16, ++(new_n_buckets
)); if (new_n_buckets < 4) new_n_buckets = 4; if (h->size
 >= (khint_t)(new_n_buckets * __ac_HASH_UPPER + 0.5)) j = 0
; else { new_flags = (khint32_t*)malloc(((new_n_buckets) <
 16? 1 : (new_n_buckets)>>4) * sizeof(khint32_t)); if (
!new_flags) return -1; memset(new_flags, 0xaa, ((new_n_buckets
) < 16? 1 : (new_n_buckets)>>4) * sizeof(khint32_t))
; if (h->n_buckets < new_n_buckets) { kh_cstr_t *new_keys
 = (kh_cstr_t*)realloc((void *)h->keys,new_n_buckets * sizeof
(kh_cstr_t)); if (!new_keys) { free(new_flags); return -1; } h
->keys = new_keys; if (1) { uint32_t *new_vals = (uint32_t
*)realloc((void *)h->vals,new_n_buckets * sizeof(uint32_t)
); if (!new_vals) { free(new_flags); return -1; } h->vals =
 new_vals; } } } } if (j) { for (j = 0; j != h->n_buckets;
 ++j) { if (((h->flags[j>>4]>>((j&0xfU)<<
1))&3) == 0) { kh_cstr_t key = h->keys[j]; uint32_t val
; khint_t new_mask; new_mask = new_n_buckets - 1; if (1) val =
 h->vals[j]; (h->flags[j>>4]|=1ul<<((j&
0xfU)<<1)); while (1) { khint_t k, i, step = 0; k = __ac_X31_hash_string
(key); i = k & new_mask; while (!((new_flags[i>>4]>>
((i&0xfU)<<1))&2)) i = (i + (++step)) & new_mask
; (new_flags[i>>4]&=~(2ul<<((i&0xfU)<<
1))); if (i < h->n_buckets && ((h->flags[i>>
4]>>((i&0xfU)<<1))&3) == 0) { { kh_cstr_t
 tmp = h->keys[i]; h->keys[i] = key; key = tmp; } if (1
) { uint32_t tmp = h->vals[i]; h->vals[i] = val; val = tmp
; } (h->flags[i>>4]|=1ul<<((i&0xfU)<<
1)); } else { h->keys[i] = key; if (1) h->vals[i] = val
; break; } } } } if (h->n_buckets > new_n_buckets) { h->
keys = (kh_cstr_t*)realloc((void *)h->keys,new_n_buckets *
 sizeof(kh_cstr_t)); if (1) h->vals = (uint32_t*)realloc((
void *)h->vals,new_n_buckets * sizeof(uint32_t)); } free(h
->flags); h->flags = new_flags; h->n_buckets = new_n_buckets
; h->n_occupied = h->size; h->upper_bound = (khint_t
)(h->n_buckets * __ac_HASH_UPPER + 0.5); } return 0; } static
 inline __attribute__ ((__unused__)) khint_t kh_put_ccv_nnc_micro_bind_scalar
(kh_ccv_nnc_micro_bind_scalar_t *h, kh_cstr_t key, int *ret) {
 khint_t x; if (h->n_occupied >= h->upper_bound) { if
 (h->n_buckets > (h->size<<1)) { if (kh_resize_ccv_nnc_micro_bind_scalar
(h, h->n_buckets - 1) < 0) { *ret = -1; return h->n_buckets
; } } else if (kh_resize_ccv_nnc_micro_bind_scalar(h, h->n_buckets
 + 1) < 0) { *ret = -1; return h->n_buckets; } } { khint_t
 k, i, site, last, mask = h->n_buckets - 1, step = 0; x = site
 = h->n_buckets; k = __ac_X31_hash_string(key); i = k &
 mask; if (((h->flags[i>>4]>>((i&0xfU)<<
1))&2)) x = i; else { last = i; while (!((h->flags[i>>
4]>>((i&0xfU)<<1))&2) && (((h->
flags[i>>4]>>((i&0xfU)<<1))&1) || !
(strcmp(h->keys[i], key) == 0))) { if (((h->flags[i>>
4]>>((i&0xfU)<<1))&1)) site = i; i = (i +
 (++step)) & mask; if (i == last) { x = site; break; } } if
 (x == h->n_buckets) { if (((h->flags[i>>4]>>
((i&0xfU)<<1))&2) && site != h->n_buckets
) x = site; else x = i; } } } if (((h->flags[x>>4]>>
((x&0xfU)<<1))&2)) { h->keys[x] = key; (h->
flags[x>>4]&=~(3ul<<((x&0xfU)<<1)))
; ++h->size; ++h->n_occupied; *ret = 1; } else if (((h->
flags[x>>4]>>((x&0xfU)<<1))&1)) { h
->keys[x] = key; (h->flags[x>>4]&=~(3ul<<
((x&0xfU)<<1))); ++h->size; *ret = 2; } else *ret
 = 0; return x; } static inline __attribute__ ((__unused__)) void
 kh_del_ccv_nnc_micro_bind_scalar(kh_ccv_nnc_micro_bind_scalar_t
 *h, khint_t x) { if (x != h->n_buckets && !((h->
flags[x>>4]>>((x&0xfU)<<1))&3)) { (
h->flags[x>>4]|=1ul<<((x&0xfU)<<1));
 --h->size; } }
11 
12static uint32_t _scalars_lookup(const void* const context, const char* const name)
13{
14	const khash_t(ccv_nnc_micro_bind_scalar)kh_ccv_nnc_micro_bind_scalar_t* const bind_scalars = (const khash_t(ccv_nnc_micro_bind_scalar)kh_ccv_nnc_micro_bind_scalar_t*)context;
15	khiter_t k = kh_get(ccv_nnc_micro_bind_scalar, bind_scalars, name)kh_get_ccv_nnc_micro_bind_scalar(bind_scalars, name);
16	assert(k != kh_end(bind_scalars))((void) sizeof ((k != ((bind_scalars)->n_buckets)) ? 1 : 0
), __extension__ ({ if (k != ((bind_scalars)->n_buckets)) ;
 else __assert_fail ("k != kh_end(bind_scalars)", "ccv_nnc_micro.c"
, 16, __extension__ __PRETTY_FUNCTION__); }));
17	return kh_val(bind_scalars, k)((bind_scalars)->vals[k]);
18}
19 
20KHASH_SET_INIT_INT64(ccv_nnc_ids)typedef struct kh_ccv_nnc_ids_s { khint_t n_buckets, size, n_occupied
, upper_bound; khint32_t *flags; khint64_t *keys; char *vals;
 } kh_ccv_nnc_ids_t; static inline __attribute__ ((__unused__
)) kh_ccv_nnc_ids_t *kh_init_ccv_nnc_ids(void) { return (kh_ccv_nnc_ids_t
*)calloc(1,sizeof(kh_ccv_nnc_ids_t)); } static inline __attribute__
 ((__unused__)) void kh_destroy_ccv_nnc_ids(kh_ccv_nnc_ids_t *
h) { if (h) { free((void *)h->keys); free(h->flags); free
((void *)h->vals); free(h); } } static inline __attribute__
 ((__unused__)) void kh_clear_ccv_nnc_ids(kh_ccv_nnc_ids_t *h
) { if (h && h->flags) { memset(h->flags, 0xaa,
 ((h->n_buckets) < 16? 1 : (h->n_buckets)>>4) *
 sizeof(khint32_t)); h->size = h->n_occupied = 0; } } static
 inline __attribute__ ((__unused__)) khint_t kh_get_ccv_nnc_ids
(const kh_ccv_nnc_ids_t *h, khint64_t key) { if (h->n_buckets
) { khint_t k, i, last, mask, step = 0; mask = h->n_buckets
 - 1; k = (khint32_t)((key)>>33^(key)^(key)<<11);
 i = k & mask; last = i; while (!((h->flags[i>>4
]>>((i&0xfU)<<1))&2) && (((h->
flags[i>>4]>>((i&0xfU)<<1))&1) || !
((h->keys[i]) == (key)))) { i = (i + (++step)) & mask;
 if (i == last) return h->n_buckets; } return ((h->flags
[i>>4]>>((i&0xfU)<<1))&3)? h->n_buckets
 : i; } else return 0; } static inline __attribute__ ((__unused__
)) int kh_resize_ccv_nnc_ids(kh_ccv_nnc_ids_t *h, khint_t new_n_buckets
) { khint32_t *new_flags = 0; khint_t j = 1; { (--(new_n_buckets
), (new_n_buckets)|=(new_n_buckets)>>1, (new_n_buckets)
|=(new_n_buckets)>>2, (new_n_buckets)|=(new_n_buckets)>>
4, (new_n_buckets)|=(new_n_buckets)>>8, (new_n_buckets)
|=(new_n_buckets)>>16, ++(new_n_buckets)); if (new_n_buckets
 < 4) new_n_buckets = 4; if (h->size >= (khint_t)(new_n_buckets
 * __ac_HASH_UPPER + 0.5)) j = 0; else { new_flags = (khint32_t
*)malloc(((new_n_buckets) < 16? 1 : (new_n_buckets)>>
4) * sizeof(khint32_t)); if (!new_flags) return -1; memset(new_flags
, 0xaa, ((new_n_buckets) < 16? 1 : (new_n_buckets)>>
4) * sizeof(khint32_t)); if (h->n_buckets < new_n_buckets
) { khint64_t *new_keys = (khint64_t*)realloc((void *)h->keys
,new_n_buckets * sizeof(khint64_t)); if (!new_keys) { free(new_flags
); return -1; } h->keys = new_keys; if (0) { char *new_vals
 = (char*)realloc((void *)h->vals,new_n_buckets * sizeof(char
)); if (!new_vals) { free(new_flags); return -1; } h->vals
 = new_vals; } } } } if (j) { for (j = 0; j != h->n_buckets
; ++j) { if (((h->flags[j>>4]>>((j&0xfU)<<
1))&3) == 0) { khint64_t key = h->keys[j]; char val; khint_t
 new_mask; new_mask = new_n_buckets - 1; if (0) val = h->vals
[j]; (h->flags[j>>4]|=1ul<<((j&0xfU)<<
1)); while (1) { khint_t k, i, step = 0; k = (khint32_t)((key
)>>33^(key)^(key)<<11); i = k & new_mask; while
 (!((new_flags[i>>4]>>((i&0xfU)<<1))&
2)) i = (i + (++step)) & new_mask; (new_flags[i>>4]
&=~(2ul<<((i&0xfU)<<1))); if (i < h->
n_buckets && ((h->flags[i>>4]>>((i&
0xfU)<<1))&3) == 0) { { khint64_t tmp = h->keys[
i]; h->keys[i] = key; key = tmp; } if (0) { char tmp = h->
vals[i]; h->vals[i] = val; val = tmp; } (h->flags[i>>
4]|=1ul<<((i&0xfU)<<1)); } else { h->keys[
i] = key; if (0) h->vals[i] = val; break; } } } } if (h->
n_buckets > new_n_buckets) { h->keys = (khint64_t*)realloc
((void *)h->keys,new_n_buckets * sizeof(khint64_t)); if (0
) h->vals = (char*)realloc((void *)h->vals,new_n_buckets
 * sizeof(char)); } free(h->flags); h->flags = new_flags
; h->n_buckets = new_n_buckets; h->n_occupied = h->size
; h->upper_bound = (khint_t)(h->n_buckets * __ac_HASH_UPPER
 + 0.5); } return 0; } static inline __attribute__ ((__unused__
)) khint_t kh_put_ccv_nnc_ids(kh_ccv_nnc_ids_t *h, khint64_t key
, int *ret) { khint_t x; if (h->n_occupied >= h->upper_bound
) { if (h->n_buckets > (h->size<<1)) { if (kh_resize_ccv_nnc_ids
(h, h->n_buckets - 1) < 0) { *ret = -1; return h->n_buckets
; } } else if (kh_resize_ccv_nnc_ids(h, h->n_buckets + 1) <
 0) { *ret = -1; return h->n_buckets; } } { khint_t k, i, site
, last, mask = h->n_buckets - 1, step = 0; x = site = h->
n_buckets; k = (khint32_t)((key)>>33^(key)^(key)<<
11); i = k & mask; if (((h->flags[i>>4]>>(
(i&0xfU)<<1))&2)) x = i; else { last = i; while
 (!((h->flags[i>>4]>>((i&0xfU)<<1))&
2) && (((h->flags[i>>4]>>((i&0xfU)
<<1))&1) || !((h->keys[i]) == (key)))) { if (((h
->flags[i>>4]>>((i&0xfU)<<1))&1)
) site = i; i = (i + (++step)) & mask; if (i == last) { x
 = site; break; } } if (x == h->n_buckets) { if (((h->flags
[i>>4]>>((i&0xfU)<<1))&2) &&
 site != h->n_buckets) x = site; else x = i; } } } if (((h
->flags[x>>4]>>((x&0xfU)<<1))&2)
) { h->keys[x] = key; (h->flags[x>>4]&=~(3ul<<
((x&0xfU)<<1))); ++h->size; ++h->n_occupied; *
ret = 1; } else if (((h->flags[x>>4]>>((x&
0xfU)<<1))&1)) { h->keys[x] = key; (h->flags[
x>>4]&=~(3ul<<((x&0xfU)<<1))); ++h->
size; *ret = 2; } else *ret = 0; return x; } static inline __attribute__
 ((__unused__)) void kh_del_ccv_nnc_ids(kh_ccv_nnc_ids_t *h, khint_t
 x) { if (x != h->n_buckets && !((h->flags[x>>
4]>>((x&0xfU)<<1))&3)) { (h->flags[x>>
4]|=1ul<<((x&0xfU)<<1)); --h->size; } }
21 
22CCV_WARN_UNUSED(ccv_nnc_micro_combine_t*)ccv_nnc_micro_combine_t* __attribute__((warn_unused_result)) ccv_nnc_micro_combine_new(const ccv_nnc_micro_io_t* const inputs, const int input_size, const char* const* const parameters, const int parameter_size, const ccv_nnc_micro_io_t* const outputs, const int output_size, const ccv_nnc_micro_io_t* const ingrads, const int ingrad_size, const ccv_nnc_micro_io_t* const outgrads, const int outgrad_size)
23{
24	assert(output_size > 0)((void) sizeof ((output_size > 0) ? 1 : 0), __extension__ (
{ if (output_size > 0) ; else __assert_fail ("output_size > 0"
, "ccv_nnc_micro.c", 24, __extension__ __PRETTY_FUNCTION__); }
));
1
Assuming 'output_size' is > 0→
2
←
Taking true branch→
25	assert(input_size > 0)((void) sizeof ((input_size > 0) ? 1 : 0), __extension__ (
{ if (input_size > 0) ; else __assert_fail ("input_size > 0"
, "ccv_nnc_micro.c", 25, __extension__ __PRETTY_FUNCTION__); }
));
3
←
Assuming 'input_size' is > 0→
4
←
Taking true branch→
26	int i, j, k;
27	// First, do reverse topological sort (from output and then reverse the order).
28	// We can do this simple thing because there is no overlaps of the outputs, thus, no cases where
29	// output[0] is the input for output[1]. Otherwise we need to detect this, see ccv_cnnp_model_new
30	// for more details on why.
31	for (i = 0; i < output_size - 1; i++)
5
←
Assuming the condition is false→
6
←
Loop condition is false. Execution continues on line 34→
32		for (j = i + 1; j < output_size; j++)
33		{ assert(outputs[i] != outputs[j])((void) sizeof ((outputs[i] != outputs[j]) ? 1 : 0), __extension__
 ({ if (outputs[i] != outputs[j]) ; else __assert_fail ("outputs[i] != outputs[j]"
, "ccv_nnc_micro.c", 33, __extension__ __PRETTY_FUNCTION__); }
)); }
34	uint64_t input_bitmask[((input_size - 1) >> 6) + 1];
35	memset(input_bitmask, 0, sizeof(uint64_t) * (((input_size - 1) >> 6) + 1));
36	ccv_array_t* const reverse_top = ccv_array_new(sizeof(ccv_nnc_micro_io_t), output_size + input_size, 0);
37	ccv_array_resize(reverse_top, output_size);
38	memcpy(ccv_array_get(reverse_top, 0)((void*)(((char*)((reverse_top)->data)) + (size_t)(reverse_top
)->rsize * (size_t)(0))), outputs, sizeof(ccv_nnc_micro_io_t) * output_size);
39	khash_t(ccv_nnc_ids)kh_ccv_nnc_ids_t* const ids = kh_init(ccv_nnc_ids)kh_init_ccv_nnc_ids();
40	for (i = 0; i < reverse_top->rnum; i++)
7
←
Assuming 'i' is < field 'rnum'→
8
←
Loop condition is true.  Entering loop body→
20
←
Assuming 'i' is >= field 'rnum'→
21
←
Loop condition is false. Execution continues on line 59→
41	{
42		const ccv_nnc_micro_io_t output = *(ccv_nnc_micro_io_t*)ccv_array_get(reverse_top, i)((void*)(((char*)((reverse_top)->data)) + (size_t)(reverse_top
)->rsize * (size_t)(i)));
43		for (j = 0; j < output->input_size; j++)
9
←
Assuming 'j' is < field 'input_size'→
10
←
Loop condition is true.  Entering loop body→
18
←
Assuming 'j' is >= field 'input_size'→
19
←
Loop condition is false. Execution continues on line 40→
44			if (!CCV_NNC_IS_MICRO_IO_INPUT(output->inputs[j])((output->inputs[j])->isa == &ccv_nnc_micro_io_input_isa
))
11
←
Assuming the condition is false→
12
←
Taking false branch→
45			{
46				int ret;
47				kh_put(ccv_nnc_ids, ids, (int64_t)(intptr_t)output->inputs[j], &ret)kh_put_ccv_nnc_ids(ids, (int64_t)(intptr_t)output->inputs[
j], &ret);
48				if (ret != 0)
49					ccv_array_push(reverse_top, &output->inputs[j]);
50			} else {
51				// This is an input, it must be represented in inputs, try to find it.
52				for (k = 0; k12.1
'k' is < 'input_size'
 < input_size; k++)
13
←
Loop condition is true.  Entering loop body→
53					if (inputs[k] == output->inputs[j])
14
←
Assuming the condition is true→
15
←
Taking true branch→
54						break;
16
←
 Execution continues on line 55→
55				assert(k < input_size)((void) sizeof ((k < input_size) ? 1 : 0), __extension__ (
{ if (k < input_size) ; else __assert_fail ("k < input_size"
, "ccv_nnc_micro.c", 55, __extension__ __PRETTY_FUNCTION__); }
)); // Cannot find the inputs, error!
17
←
Taking true branch→
56				input_bitmask[k >> 6] |= ((uint64_t)1 << (k & 63));
57			}
58	}
59	kh_destroy(ccv_nnc_ids, ids)kh_destroy_ccv_nnc_ids(ids);
60	for (i = 0; i21.1
'i' is < 'input_size'
 < input_size; i++)
22
←
Loop condition is true.  Entering loop body→
24
←
Assuming 'i' is >= 'input_size'→
25
←
Loop condition is false. Execution continues on line 63→
61		{ assert((input_bitmask[i >> 6] & ((uint64_t)1 << (i & 63))))((void) sizeof (((input_bitmask[i >> 6] & ((uint64_t
)1 << (i & 63)))) ? 1 : 0), __extension__ ({ if ((input_bitmask
[i >> 6] & ((uint64_t)1 << (i & 63)))) ; else
 __assert_fail ("(input_bitmask[i >> 6] & ((uint64_t)1 << (i & 63)))"
, "ccv_nnc_micro.c", 61, __extension__ __PRETTY_FUNCTION__); }
)); } // Assuming they all match.
23
←
Taking true branch→
62	// Second, binding parameters (bounded scalars).
63	khash_t(ccv_nnc_micro_bind_scalar)kh_ccv_nnc_micro_bind_scalar_t* const bind_scalars = kh_init(ccv_nnc_micro_bind_scalar)kh_init_ccv_nnc_micro_bind_scalar();
64	for (i = 0; i < parameter_size; i++)
26
←
Assuming 'i' is >= 'parameter_size'→
27
←
Loop condition is false. Execution continues on line 71→
65	{
66		int ret;
67		khiter_t k = kh_put(ccv_nnc_micro_bind_scalar, bind_scalars, parameters[i], &ret)kh_put_ccv_nnc_micro_bind_scalar(bind_scalars, parameters[i],
 &ret);
68		assert(ret != 0)((void) sizeof ((ret != 0) ? 1 : 0), __extension__ ({ if (ret
 != 0) ; else __assert_fail ("ret != 0", "ccv_nnc_micro.c", 68
, __extension__ __PRETTY_FUNCTION__); }));
69		kh_val(bind_scalars, k)((bind_scalars)->vals[k]) = i;
70	}
71	for (i = 0; i < reverse_top->rnum; i++)
28
←
Loop condition is true.  Entering loop body→
29
←
Loop condition is false. Execution continues on line 76→
72	{
73		const ccv_nnc_micro_io_t output = *(ccv_nnc_micro_io_t*)ccv_array_get(reverse_top, reverse_top->rnum - 1 - i)((void*)(((char*)((reverse_top)->data)) + (size_t)(reverse_top
)->rsize * (size_t)(reverse_top->rnum - 1 - i)));
74		ccv_nnc_micro_bind_scalars(output, _scalars_lookup, bind_scalars);
75	}
76	kh_destroy(ccv_nnc_micro_bind_scalar, bind_scalars)kh_destroy_ccv_nnc_micro_bind_scalar(bind_scalars);
77	const int var_count = reverse_top->rnum + input_size;
78	// Applying numbering for the inputs. Note that our variables are numbered in reverse topological order.
79	for (i = 0; i < input_size; i++)
30
←
Loop condition is true.  Entering loop body→
31
←
Loop condition is false. Execution continues on line 81→
80		ccv_nnc_micro_numbering(inputs[i], i, var_count);
81	ccv_array_t* const equal_assertions = ccv_array_new(sizeof(ccv_nnc_micro_id_equal_assertion_t), 0, 0);
82	// Applying numbering for the outputs and collect equal assertions.
83	for (i = reverse_top->rnum - 1; i >= 0; i--)
32
←
Loop condition is true.  Entering loop body→
33
←
Loop condition is false. Execution continues on line 89→
84	{
85		const ccv_nnc_micro_io_t output = *(ccv_nnc_micro_io_t*)ccv_array_get(reverse_top, reverse_top->rnum - 1 - i)((void*)(((char*)((reverse_top)->data)) + (size_t)(reverse_top
)->rsize * (size_t)(reverse_top->rnum - 1 - i)));
86		ccv_nnc_micro_numbering(output, i + input_size, var_count);
87		ccv_nnc_micro_equal_assertions(output, equal_assertions);
88	}
89	for (i = 0; i < ingrad_size; i++)
34
←
Assuming 'i' is < 'ingrad_size'→
35
←
Loop condition is true.  Entering loop body→
36
←
Assuming 'i' is >= 'ingrad_size'→
37
←
Loop condition is false. Execution continues on line 91→
90		ccv_nnc_micro_numbering(ingrads[i], -1, var_count);
91	for (i = 0; i < outgrad_size; i++)
38
←
Assuming 'i' is >= 'outgrad_size'→
39
←
Loop condition is false. Execution continues on line 94→
92		ccv_nnc_micro_numbering(outgrads[i], -1, var_count);
93	// Fill in shapes for variables.
94	ccv_nnc_micro_tensor_t* const vars = (ccv_nnc_micro_tensor_t*)cccalloccalloc(var_count * 2, sizeof(ccv_nnc_micro_tensor_t));
95	for (i = 0; i < input_size; i++)
40
←
Loop condition is true.  Entering loop body→
41
←
Loop condition is false. Execution continues on line 100→
96	{
97		vars[i].dimensions = inputs[i]->dimensions;
98		vars[i].input = -1;
99	}
100	for (i = 0; i < reverse_top->rnum; i++)
42
←
Loop condition is true.  Entering loop body→
43
←
Loop condition is false. Execution continues on line 105→
101	{
102		const ccv_nnc_micro_io_t output = *(ccv_nnc_micro_io_t*)ccv_array_get(reverse_top, reverse_top->rnum - 1 - i)((void*)(((char*)((reverse_top)->data)) + (size_t)(reverse_top
)->rsize * (size_t)(reverse_top->rnum - 1 - i)));
103		vars[i + input_size] = ccv_nnc_micro_return_shape(output);
104	}
105	for (i = var_count; i < 2 * var_count; i++)
44
←
Loop condition is true.  Entering loop body→
45
←
Loop condition is true.  Entering loop body→
46
←
Loop condition is false. Execution continues on line 112→
106	{
107		vars[i].dimensions = vars[2 * var_count - 1 - i].dimensions;
108		vars[i].input = 2 * var_count - 1 - i;
109	}
110	// Lower each ccv_nnc_micro_io_t (except the input) op into nested loops such that we can
111	// apply optimizations later.
112	int function_count = reverse_top->rnum;
113	ccv_nnc_micro_function_t* functions = (ccv_nnc_micro_function_t*)ccmallocmalloc(sizeof(ccv_nnc_micro_function_t) * function_count);
114	for (i = 0; i < function_count; i++)
47
←
Loop condition is true.  Entering loop body→
48
←
Loop condition is false. Execution continues on line 119→
115	{
116		const ccv_nnc_micro_io_t output = *(ccv_nnc_micro_io_t*)ccv_array_get(reverse_top, function_count - 1 - i)((void*)(((char*)((reverse_top)->data)) + (size_t)(reverse_top
)->rsize * (size_t)(function_count - 1 - i)));
117		functions[i] = ccv_nnc_micro_emit(output);
118	}
119	ccv_nnc_micro_combine_t* const combine = (ccv_nnc_micro_combine_t*)ccmallocmalloc(sizeof(ccv_nnc_micro_combine_t));
120	combine->parameter_size = parameter_size;
121	combine->forward.input_size = input_size;
122	combine->forward.inputs = (int*)ccmallocmalloc(sizeof(int) * (input_size + output_size));
123	for (i = 0; i < input_size; i++)
49
←
Loop condition is true.  Entering loop body→
50
←
Loop condition is false. Execution continues on line 125→
124		combine->forward.inputs[i] = inputs[i]->id;
125	combine->forward.output_size = output_size;
126	combine->forward.outputs = combine->forward.inputs + input_size;
127	for (i = 0; i < output_size; i++)
51
←
Loop condition is true.  Entering loop body→
52
←
Loop condition is false. Execution continues on line 129→
128		combine->forward.outputs[i] = outputs[i]->id;
129	combine->forward.var_count = var_count;
130	// We copied forward.vars so backward.vars and forward.vars can maintain separate states.
131	// However, shape and related allocations are shared because these are not going to be mutated.
132	combine->forward.vars = (ccv_nnc_micro_tensor_t*)ccmallocmalloc(sizeof(ccv_nnc_micro_tensor_t) * var_count);
133	memcpy(combine->forward.vars, vars, sizeof(ccv_nnc_micro_tensor_t) * var_count);
134	combine->forward.function_count = function_count;
135	combine->forward.functions = functions;
136	ccv_nnc_micro_program_simplify(&combine->forward, inputs, input_size, outputs, output_size, equal_assertions);
137	function_count = reverse_top->rnum * 2;
138	functions = (ccv_nnc_micro_function_t*)ccmallocmalloc(sizeof(ccv_nnc_micro_function_t) * function_count);
139	for (i = 0; i < reverse_top->rnum; i++)
53
←
Loop condition is true.  Entering loop body→
54
←
Loop condition is false. Execution continues on line 144→
140	{
141		const ccv_nnc_micro_io_t output = *(ccv_nnc_micro_io_t*)ccv_array_get(reverse_top, reverse_top->rnum - 1 - i)((void*)(((char*)((reverse_top)->data)) + (size_t)(reverse_top
)->rsize * (size_t)(reverse_top->rnum - 1 - i)));
142		functions[i] = ccv_nnc_micro_emit(output);
143	}
144	for (i = reverse_top->rnum; i < function_count; i++)
55
←
Loop condition is true.  Entering loop body→
56
←
Loop condition is false. Execution continues on line 149→
145	{
146		const ccv_nnc_micro_io_t output = *(ccv_nnc_micro_io_t*)ccv_array_get(reverse_top, i - reverse_top->rnum)((void*)(((char*)((reverse_top)->data)) + (size_t)(reverse_top
)->rsize * (size_t)(i - reverse_top->rnum)));
147		functions[i] = ccv_nnc_micro_emit_grad(output, var_count);
148	}
149	combine->backward.input_size = ingrad_size;
150	combine->backward.inputs = ingrad_size + outgrad_size > 0 ? (int*)ccmallocmalloc(sizeof(int) * (ingrad_size + outgrad_size)) : 0;
57
←
Assuming the condition is false→
58
←
'?' condition is false→
59
←
Null pointer value stored to field 'inputs'→
151	for (i = 0; i < ingrad_size; i++)
60
←
Loop condition is true.  Entering loop body→
152		combine->backward.inputs[i] = ingrads[i]->id;
61
←
Array access (via field 'inputs') results in a null pointer dereference
153	combine->backward.output_size = outgrad_size;
154	combine->backward.outputs = outgrad_size > 0 ? combine->backward.inputs + ingrad_size : 0;
155	for (i = 0; i < outgrad_size; i++)
156		combine->backward.outputs[i] = outgrads[i]->id;
157	combine->backward.var_count = var_count * 2;
158	combine->backward.vars = vars;
159	combine->backward.function_count = function_count;
160	combine->backward.functions = functions;
161	ccv_nnc_micro_program_simplify(&combine->backward, ingrads, ingrad_size, outgrads, outgrad_size, equal_assertions);
162	combine->equal_assertions = equal_assertions;
163	for (i = 0; i < reverse_top->rnum; i++)
164	{
165		const ccv_nnc_micro_io_t output = *(ccv_nnc_micro_io_t*)ccv_array_get(reverse_top, i)((void*)(((char*)((reverse_top)->data)) + (size_t)(reverse_top
)->rsize * (size_t)(i)));
166		ccv_nnc_micro_deinit(output);
167		ccfreefree(output);
168	}
169	ccv_array_free(reverse_top);
170	// It may overlap with inputs, in that case, skip.
171	for (i = 0; i < ingrad_size; i++)
172	{
173		int flag = 0;
174		for (j = 0; !flag && j < input_size; j++)
175			flag = (inputs[j] == ingrads[i]);
176		if (!flag)
177		{
178			ccv_nnc_micro_deinit(ingrads[i]);
179			ccfreefree(ingrads[i]);
180		}
181	}
182	for (i = 0; i < input_size; i++)
183	{
184		ccv_nnc_micro_deinit(inputs[i]);
185		ccfreefree(inputs[i]);
186	}
187	for (i = 0; i < outgrad_size; i++) // Should be no overlap on outgrads.
188	{
189		ccv_nnc_micro_deinit(outgrads[i]);
190		ccfreefree(outgrads[i]);
191	}
192	return combine;
193}
194 
195void ccv_nnc_micro_loop_index_free(ccv_nnc_micro_loop_index_term_t* const term)
196{
197	if (term->type == CCV_NNC_MICRO_LOOP_INDEX_TYPE_BINARY)
198	{
199		ccv_nnc_micro_loop_index_free(&term->binary->left);
200		ccv_nnc_micro_loop_index_free(&term->binary->right);
201		ccfreefree(term->binary);
202	}
203}
204 
205void ccv_nnc_micro_loop_variable_free(ccv_nnc_micro_loop_variable_t* const var)
206{
207	int i;
208	for (i = 0; i < var->index_count; i++)
209		ccv_nnc_micro_loop_index_free(&var->index[i]);
210}
211 
212static void _ccv_nnc_micro_loop_expression_free(ccv_nnc_micro_loop_expression_t* const expr)
213{
214	switch (expr->type)
215	{
216		case CCV_NNC_MICRO_LOOP_EXPR_TYPE_VAR: {
217			ccv_nnc_micro_loop_variable_free(&expr->variable);
218			break;
219		}
220		case CCV_NNC_MICRO_LOOP_EXPR_TYPE_UNARY: {
221			_ccv_nnc_micro_loop_expression_free(expr->unary.x);
222			ccfreefree(expr->unary.x);
223			break;
224		}
225		case CCV_NNC_MICRO_LOOP_EXPR_TYPE_BINARY: {
226			_ccv_nnc_micro_loop_expression_free(expr->binary.left);
227			ccfreefree(expr->binary.left);
228			_ccv_nnc_micro_loop_expression_free(expr->binary.right);
229			ccfreefree(expr->binary.right);
230			break;
231		}
232		case CCV_NNC_MICRO_LOOP_EXPR_TYPE_TERNAY: {
233			_ccv_nnc_micro_loop_expression_free(expr->ternary.pivot);
234			ccfreefree(expr->ternary.pivot);
235			_ccv_nnc_micro_loop_expression_free(expr->ternary.left);
236			ccfreefree(expr->ternary.left);
237			_ccv_nnc_micro_loop_expression_free(expr->ternary.right);
238			ccfreefree(expr->ternary.right);
239			break;
240		}
241	}
242}
243 
244void ccv_nnc_micro_loop_statement_lvalue_free(ccv_nnc_micro_loop_statement_t* const statement)
245{
246	switch (statement->type)
247	{
248		case CCV_NNC_MICRO_LOOP_STATEMENT_TYPE_COMPOUND_ASSIGNMENT: {
249			if (statement->compound_assignment.lvalue.type == CCV_NNC_MICRO_LOOP_EXPR_TYPE_VAR)
250				ccv_nnc_micro_loop_variable_free(&statement->compound_assignment.lvalue.variable);
251			break;
252		}
253		case CCV_NNC_MICRO_LOOP_STATEMENT_TYPE_ASSIGNMENT: {
254			ccv_nnc_micro_loop_variable_free(&statement->assignment.lvalue);
255			break;
256		}
257	}
258}
259 
260void ccv_nnc_micro_loop_statement_free(ccv_nnc_micro_loop_statement_t* const statement)
261{
262	switch (statement->type)
263	{
264		case CCV_NNC_MICRO_LOOP_STATEMENT_TYPE_COMPOUND_ASSIGNMENT: {
265			if (statement->compound_assignment.lvalue.type == CCV_NNC_MICRO_LOOP_EXPR_TYPE_VAR)
266				ccv_nnc_micro_loop_variable_free(&statement->compound_assignment.lvalue.variable);
267			_ccv_nnc_micro_loop_expression_free(&statement->compound_assignment.rvalue);
268			break;
269		}
270		case CCV_NNC_MICRO_LOOP_STATEMENT_TYPE_ASSIGNMENT: {
271			ccv_nnc_micro_loop_variable_free(&statement->assignment.lvalue);
272			_ccv_nnc_micro_loop_expression_free(&statement->assignment.rvalue);
273			break;
274		}
275	}
276}
277 
278void ccv_nnc_micro_loops_free(ccv_nnc_micro_loop_t* const loops, const int loop_count)
279{
280	int i, j;
281	for (i = 0; i < loop_count; i++)
282	{
283		for (j = 0; j < loops[i].statement_count; j++)
284			ccv_nnc_micro_loop_statement_free(&loops[i].statements[j]);
285		if (loops[i].statements)
286			ccfreefree(loops[i].statements);
287		if (loops[i].carrieds)
288			ccfreefree(loops[i].carrieds);
289	}
290}
291 
292void ccv_nnc_micro_combine_free(ccv_nnc_micro_combine_t* const combine)
293{
294	int i, j;
295	const int var_count = combine->forward.var_count;
296	for (i = 0; i < var_count; i++)
297		if (combine->forward.vars[i].shape)
298		{
299			for (j = 0; j < combine->forward.vars[i].dimensions; j++)
300				ccv_nnc_micro_loop_index_free(&combine->forward.vars[i].shape[j]);
301			ccfreefree(combine->forward.vars[i].shape);
302		}
303	ccfreefree(combine->forward.vars);
304	ccfreefree(combine->backward.vars);
305	int function_count = combine->forward.function_count;
306	for (i = 0; i < function_count; i++)
307	{
308		const int block_count = combine->forward.functions[i].block_count;
309		ccv_nnc_micro_loop_block_t* const blocks = (block_count == 1) ? &combine->forward.functions[i].one_block : combine->forward.functions[i].blocks;
310		for (j = 0; j < block_count; j++)
311		{
312			ccv_nnc_micro_loop_block_t block = blocks[j];
313			ccv_nnc_micro_loops_free(block.loops, block.loop_count);
314			ccfreefree(block.loops);
315		}
316		if (block_count > 1)
317			ccfreefree(combine->forward.functions[i].blocks);
318	}
319	ccfreefree(combine->forward.functions);
320	ccfreefree(combine->forward.inputs);
321	// Backward and forward share the same vars.
322	function_count = combine->backward.function_count;
323	for (i = 0; i < function_count; i++)
324	{
325		const int block_count = combine->backward.functions[i].block_count;
326		ccv_nnc_micro_loop_block_t* const blocks = (block_count == 1) ? &combine->backward.functions[i].one_block : combine->backward.functions[i].blocks;
327		for (j = 0; j < block_count; j++)
328		{
329			ccv_nnc_micro_loop_block_t block = blocks[j];
330			ccv_nnc_micro_loops_free(block.loops, block.loop_count);
331			ccfreefree(block.loops);
332		}
333		if (block_count > 1)
334			ccfreefree(combine->backward.functions[i].blocks);
335	}
336	ccfreefree(combine->backward.functions);
337	if (combine->backward.inputs)
338		ccfreefree(combine->backward.inputs);
339	ccv_array_free(combine->equal_assertions);
340	ccfreefree(combine);
341}
342 
343char* ccv_nnc_micro_combine_c(ccv_nnc_micro_combine_t* const combine)
344{
345	return 0;
346}