[Bug rtl-optimization/54300] [4.7, 4.8, 4.9 Regression] regcprop incorrectly looks through parallel register swap operation

Wed, 20 Nov 2013 05:55:55 -0800 

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54300

--- Comment #13 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Wed Nov 20 13:55:04 2013
New Revision: 205117

URL: http://gcc.gnu.org/viewcvs?rev=205117&root=gcc&view=rev
Log:
PR rtl-optimization/54300

gcc/

    PR rtl-optimization/54300
    * regcprop.c (copyprop_hardreg_forward_1): Ensure any unused
    outputs in a single-set are killed from the value chains.

gcc/testsuite:

    PR rtl-optimization/54300
    * gcc.target/arm/pr54300.C: New test.


Added:
    trunk/gcc/testsuite/gcc.target/arm/pr54300.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/regcprop.c
    trunk/gcc/testsuite/ChangeLog

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