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%TEST_SAXPY3 test integer overflow in GB_AxB_saxpy3_cumsum.c
%
% This test creates successively larger matrices, eventually triggering
% integer overflow when Cp is 32-bit and the matrix has more the 2^32 entries.
% It does not need to set the global hack flag to trigger the condition
% artificially. However, this test is costly and can only be done on a
% large system, so it is not part of the testall.m script. See test296.m.
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
rng ('default') ;
clear all
clear mex
n = 10e6 ;
nz = 1 ;
range = int8 ([0 128]) ;
GrB.threads (32) ;
% GrB.burble (1) ;
e = 1 ;
while (e < 4.2e9)
nz = 1.25*nz ;
d = nz / n^2 ;
tic ;
C = GrB.random (n, n, d, 'range', range) ;
t = toc ;
e = GrB.entries (C) ;
fprintf ('\ncreate: %g sec, nvals %g million\n', t, e / 1e6) ;
tic ;
C = C^2 ;
t = toc ;
e = GrB.entries (C) ;
fprintf ('mxm: %g sec, nvals: %g million\n', t, e/1e6) ;
% disp (C, 1) ;
clear C
end
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