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function test69
%TEST69 test GrB_assign with aliased inputs, C<C>(:,:) = accum(C(:,:),C)
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
fprintf ('test69 ------------------ assign alias tests\n') ;
rng ('default') ;
semiring.multiply = 'times' ;
semiring.add = 'plus' ;
semiring.class = 'double' ;
desc = struct ('outp', 'replace') ;
seed = 1 ;
for m = [1 5 10 100]
for n = [1 5 10 100]
fprintf ('.') ;
for trial = 1:30
A = GB_mex_random (m, n, 10*n, 0, seed) ; seed = seed + 1 ;
C = GB_mex_random (m, n, 10*n, 0, seed) ; seed = seed + 1 ;
% C<C> += C
C1 = GB_mex_assign_alias (C, 'plus', [ ], [ ], [ ]) ;
C2 = GB_mex_assign (C, [ ], 'plus', C, [ ], [ ], [ ], 0) ;
assert (isequal (C1, C2)) ;
% C<C,replace> += C
C1 = GB_mex_assign_alias (C, 'plus', [ ], [ ], desc) ;
C2 = GB_mex_assign (C, [ ], 'plus', C, [ ], [ ], desc, 0) ;
assert (isequal (C1, C2)) ;
% C<C,replace> = C
C1 = GB_mex_assign_alias (C, [ ], [ ], [ ], desc) ;
C2 = GB_mex_assign (C, [ ], [ ], C, [ ], [ ], desc, 0) ;
C2.iso = 0 ;
assert (isequal (C1, C2)) ;
% C(I,J)<C> += C(I,J)
I = uint64 (randperm (m) - 1) ;
J = uint64 (randperm (n) - 1) ;
C1 = GB_mex_assign_alias (C, 'plus', I, J, [ ]) ;
C2 = GB_mex_assign (C, [ ], 'plus', C, I, J, [ ], 0) ;
assert (isequal (C1, C2)) ;
% C<C,replace> += C
C1 = GB_mex_subassign_alias (C, 'plus', desc) ;
C2 = GB_mex_subassign (C, C, 'plus', C, [ ], [ ], desc) ;
assert (isequal (C1, C2)) ;
% C<C,replace> = C
C1 = GB_mex_subassign_alias (C, [ ], desc) ;
C2 = GB_mex_subassign (C, C, [ ], C, [ ], [ ], desc) ;
assert (isequal (C1, C2)) ;
% C(:,:) = 0
Z = GB_mex_expand (sparse (1), 0) ;
C1 = GB_mex_subassign (C, [ ], [ ], Z, [ ], [ ], desc) ;
C2 = sparse (m, n) ;
assert (isequal (1 * C1.matrix, C2)) ;
end
end
end
fprintf ('\ntest69: assign alias tests passed\n') ;
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