https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120200
Bug ID: 120200
Summary: [16 Regression] profiledbootstrap broken on
x86_64-linux with -Wstringop-overflow in
i386-expand.cc
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: acoplan at gcc dot gnu.org
Target Milestone: ---
I tried a profiledbootstrap on x86_64-linux-gnu at
r16-457-g49c44911df72f55e2004ffa9f5eb362de29ca188 and it failed as follows.
Configuration flags: --with-arch=native --enable-multilib
--with-multilib-list=m32,m64
It fails during stageprofile with:
/fast/trunk/src/gcc-worktrees/base-profile/gcc/config/i386/i386-expand.cc: In
function ‘bool expand_vec_perm2_vperm2f128_vblend(expand_vec_perm_d*)’:
/fast/trunk/src/gcc-worktrees/base-profile/gcc/config/i386/i386-expand.cc:22907:20:
error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
22907 | dthird.perm[i] = i ^ nelt2;
| ~~~~~~~~~~~~~~~^~~~~~~~~~~
In file included from
/fast/trunk/src/gcc-worktrees/base-profile/gcc/config/i386/i386-expand.cc:95:
/fast/trunk/src/gcc-worktrees/base-profile/gcc/config/i386/i386-expand.h:29:17:
note: at offset 64 into destination object ‘expand_vec_perm_d::perm’ of size 64
29 | unsigned char perm[MAX_VECT_LEN];
| ^~~~
