re PR target/65768 (sub-optimimal code for constant Uses in loop)

re PR target/65768 (sub-optimimal code for constant Uses in loop)

gcc/ChangeLog:

2015-06-03  Kugan Vivekanandarajah  <kuganv@linaro.org>
	    Zhenqiang Chen  <zhenqiang.chen@linaro.org>

	PR target/65768
	* cprop.c (try_replace_reg): Check cost of constants before propagating.

gcc/testsuite/ChangeLog:

2015-06-03  Kugan Vivekanandarajah  <kuganv@linaro.org>

	PR target/65768
	* gcc.target/arm/maskdata.c: Remove -fno-gcse.

Co-Authored-By: Zhenqiang Chen <zhenqiang.chen@linaro.org>
From-SVN: r224048