On Mon, Aug 31, 2026 at 7:50 AM Haochen Jiang <[email protected]> wrote: > > On Linux/x86_64, > > 2c1e97207485e54ab6ae085f76c07e62a14440ae is the first bad commit > commit 2c1e97207485e54ab6ae085f76c07e62a14440ae > Author: Jovan Dmitrovic <[email protected]> > Date: Sat Aug 29 12:09:51 2026 -0600 > > [PATCH v4 1/3] ivopts: Remove bias from calculating reg pressure cost. > > caused > > FAIL: gcc.dg/tree-ssa/ssa-sink-18.c scan-tree-dump-times sink2 "Sunk > statements: 5" 1 > > with GCC configured with > > ../../gcc/configure > --prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r17-3756/usr > --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld > --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl > --enable-libmpx x86_64-linux --disable-bootstrap > > To reproduce: > > $ cd {build_dir}/gcc && make check > RUNTESTFLAGS="tree-ssa.exp=gcc.dg/tree-ssa/ssa-sink-18.c > --target_board='unix{-m64}'" > $ cd {build_dir}/gcc && make check > RUNTESTFLAGS="tree-ssa.exp=gcc.dg/tree-ssa/ssa-sink-18.c > --target_board='unix{-m64\ -march=cascadelake}'"
Some archeology on this testcase should reveal whether -fno-ivopts on it would be appropriate, it already has a bunch of xfails ... > (Please directly reply to this email for question about this report.) > (If you met problems with cascadelake related, disabling AVX512F in command > line might save that.) > (However, please make sure that there is no potential problems with AVX512.)
