r234679 - in /trunk/gcc: ChangeLog config/i386/...

Fri Apr 1 16:08:00 GMT 2016

Author: jakub
Date: Fri Apr  1 16:08:21 2016
New Revision: 234679

URL: https://gcc.gnu.org/viewcvs?rev=234679&root=gcc&view=rev
Log:
	PR rtl-optimization/70467
	* config/i386/i386.md (*add<dwi>3_doubleword, *sub<dwi>3_doubleword):
	If low word of the last operand is 0, just emit addition/subtraction
	for the high word.

	* gcc.target/i386/pr70467-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr70467-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.md
    trunk/gcc/testsuite/ChangeLog