https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77405
--- Comment #10 from John Marino <gnugcc at marino dot st> ---
Okay, I bisected this.
SVN r239376 (August 11) is the last commit that works
I confirmed that r239378, the next commit on the TRUNK, fails to build,
resulting with the SIGBUS error.
The log for that commit is:
Use TImode for piecewise move in 64-bit mode. We should use TImode in
32-bit mode and use OImode or XImode if they are available. But since
by_pieces_ninsns determines the widest mode with MAX_FIXED_MODE_SIZE,
we can only use TImode in 64-bit mode.
gcc/
* config/i386/i386.h (MOVE_MAX_PIECES): Use TImode in 64-bit
mode if unaligned SSE load and store are optimal.
