1function test69
2%TEST69 test GrB_assign with aliased inputs, C<C>(:,:) = accum(C(:,:),C)
3
4% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2021, All Rights Reserved.
5% SPDX-License-Identifier: Apache-2.0
6
7fprintf ('test69 ------------------  assign alias tests\n') ;
8
9rng ('default') ;
10
11semiring.multiply = 'times' ;
12semiring.add = 'plus' ;
13semiring.class = 'double' ;
14
15desc = struct ('outp', 'replace') ;
16
17seed = 1 ;
18for m = [1 5 10 100]
19    for n = [1 5 10 100]
20        fprintf ('.') ;
21
22        for trial = 1:30
23            A = GB_mex_random (m, n, 10*n, 0, seed) ; seed = seed + 1 ;
24            C = GB_mex_random (m, n, 10*n, 0, seed) ; seed = seed + 1 ;
25
26            % C<C> += C
27            C1 = GB_mex_assign_alias (C, 'plus', [ ], [ ], [ ]) ;
28            C2 = GB_mex_assign (C, [ ], 'plus', C, [ ], [ ], [ ], 0) ;
29            assert (isequal (C1, C2)) ;
30
31            % C<C,replace> += C
32            C1 = GB_mex_assign_alias (C, 'plus', [ ], [ ], desc) ;
33            C2 = GB_mex_assign (C, [ ], 'plus', C, [ ], [ ], desc, 0) ;
34            assert (isequal (C1, C2)) ;
35
36            % C<C,replace> = C
37            C1 = GB_mex_assign_alias (C, [ ], [ ], [ ], desc) ;
38            C2 = GB_mex_assign (C, [ ], [ ], C, [ ], [ ], desc, 0) ;
39            assert (isequal (C1, C2)) ;
40
41            % C(I,J)<C> += C(I,J)
42            I = uint64 (randperm (m) - 1) ;
43            J = uint64 (randperm (n) - 1) ;
44            C1 = GB_mex_assign_alias (C, 'plus', I, J, [ ]) ;
45            C2 = GB_mex_assign (C, [ ], 'plus', C, I, J, [ ], 0) ;
46            assert (isequal (C1, C2)) ;
47
48            % C<C,replace> += C
49            C1 = GB_mex_subassign_alias (C, 'plus', desc) ;
50            C2 = GB_mex_subassign (C, C, 'plus', C, [ ], [ ], desc) ;
51            assert (isequal (C1, C2)) ;
52
53            % C<C,replace> = C
54            C1 = GB_mex_subassign_alias (C, [ ], desc) ;
55            C2 = GB_mex_subassign (C, C, [ ], C, [ ], [ ], desc) ;
56            assert (isequal (C1, C2)) ;
57
58            % C(:,:) = 0
59            Z = GB_mex_expand (sparse (1), 0) ;
60            C1 = GB_mex_subassign (C, [ ], [ ], Z, [ ], [ ], desc) ;
61            C2 = sparse (m, n) ;
62            assert (isequal (1 * C1.matrix, C2)) ;
63
64        end
65    end
66end
67
68fprintf ('\ntest69: assign alias tests passed\n') ;
69
70