https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82547
--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> --- Author: rsandifo Date: Wed Nov 22 13:58:57 2017 New Revision: 255059 URL: https://gcc.gnu.org/viewcvs?rev=255059&root=gcc&view=rev Log: PR82547: Undetected overflow for UNSIGNED wide_ints wi::add_large and wi::sub_large weren't setting the overflow bit correctly for unsigned operations if the result needed fewer HWIs than the precision. 2017-11-22 Richard Sandiford <richard.sandif...@linaro.org> gcc/ PR middle-end/82547 * wide-int.cc (wi::add_large, wi::sub_large): Fix overflow detection for unsigned values with fewer HWIs than the precision. (test_overflow): New function. (wide_int_cc_tests): Call it. Modified: trunk/gcc/ChangeLog trunk/gcc/wide-int.cc
