https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112510
--- Comment #15 from Vladimir Sadovnikov <sadko4u at gmail dot com> --- Hmmm. But why not? We're just looking for the value stored in %rbx register... Here's scenario for GCC 7.5.0: ~/tmp> gcc --version gcc (SUSE Linux) 7.5.0 Copyright (C) 2017 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. ~/tmp> g++ -fsanitize=address -mavx512f -Og test.cpp ~/tmp> export ASAN_OPTIONS=detect_stack_use_after_return=1 ~/tmp> ./a.out Illegal instruction (core dumped) ~/tmp> gdb ./a.out GNU gdb (GDB; SUSE Linux Enterprise 15) 12.1 Copyright (C) 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-suse-linux". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://bugs.opensuse.org/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from ./a.out... (gdb) r Starting program: /home/sadko/tmp/a.out Missing separate debuginfos, use: zypper install glibc-debuginfo-2.31-150300.63.1.x86_64 [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Program received signal SIGILL, Illegal instruction. 0x00000000004007ce in gate_x1_curve(float*, float const*, dsp::gate_knee_t const*, unsigned long) () Missing separate debuginfos, use: zypper install libasan4-debuginfo-7.5.0+r278197-150000.4.35.1.x86_64 libgcc_s1-debuginfo-13.2.1+git7813-150000.1.3.3.x86_64 libstdc++6-debuginfo-13.2.1+git7813-150000.1.3.3.x86_64 (gdb) disp /16i $pc 2: x/16i $pc => 0x4007ce <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+167>: vbroadcastss (%r15),%zmm0 0x4007d4 <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+173>: vbroadcastss 0x4(%r15),%zmm1 0x4007db <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+180>: vbroadcastss 0x8(%r15),%zmm2 0x4007e2 <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+187>: vbroadcastss 0xc(%r15),%zmm3 0x4007e9 <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+194>: vbroadcastss 0x10(%r15),%zmm4 0x4007f0 <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+201>: vbroadcastss 0x14(%r15),%zmm5 0x4007f7 <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+208>: vbroadcastss 0x18(%r15),%zmm6 0x4007fe <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+215>: vbroadcastss 0x1c(%r15),%zmm7 0x400805 <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+222>: vmovaps %zmm0,0x140(%rbx) 0x40080c <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+229>: vmovaps %zmm1,0x180(%rbx) 0x400813 <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+236>: vmovaps %zmm2,0x1c0(%rbx) 0x40081a <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+243>: vmovaps %zmm3,0x200(%rbx) 0x400821 <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+250>: vmovaps %zmm4,0x240(%rbx) 0x400828 <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+257>: vmovaps %zmm5,0x280(%rbx) 0x40082f <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+264>: vmovaps %zmm6,0x2c0(%rbx) 0x400836 <_Z13gate_x1_curvePfPKfPKN3dsp11gate_knee_tEm+271>: vmovaps %zmm7,0x300(%rbx) (gdb) i r rbx rbx 0x7ffff3900000 140737279688704
