r239378 - in /trunk/gcc: ChangeLog config/i386/...

[hjl@gcc.gnu.org]

Author: hjl
Date: Thu Aug 11 15:51:01 2016
New Revision: 239378

URL: https://gcc.gnu.org/viewcvs?rev=239378&root=gcc&view=rev
Log:
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.

gcc/testsuite/

	* gcc.target/i386/pieces-memcpy-1.c: New test.
	* gcc.target/i386/pieces-memcpy-2.c: Likewise.
	* gcc.target/i386/pieces-memcpy-3.c: Likewise.
	* gcc.target/i386/pieces-memcpy-4.c: Likewise.
	* gcc.target/i386/pieces-memcpy-5.c: Likewise.
	* gcc.target/i386/pieces-memcpy-6.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pieces-memcpy-1.c
    trunk/gcc/testsuite/gcc.target/i386/pieces-memcpy-2.c
    trunk/gcc/testsuite/gcc.target/i386/pieces-memcpy-3.c
    trunk/gcc/testsuite/gcc.target/i386/pieces-memcpy-4.c
    trunk/gcc/testsuite/gcc.target/i386/pieces-memcpy-5.c
    trunk/gcc/testsuite/gcc.target/i386/pieces-memcpy-6.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.h
    trunk/gcc/testsuite/ChangeLog