https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78575
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-11-29
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Bisection identified r239378 as the first revision to ICE:
r239378 (gcc 7.0.0) failed (status 4):
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r239378 | hjl | 2016-08-11 11:51:01 -0400 (Thu, 11 Aug 2016) | 21 lines
Use TImode for piecewise move in 64-bit mode
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.
