[Bug rtl-optimization/87761] [9 regression][MIPS] New FAIL: gcc.target/mips/fix-r4000-10.c -O1 start with r265398

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87761

--- Comment #14 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Tue Feb 26 17:08:06 2019
New Revision: 269218

URL: https://gcc.gnu.org/viewcvs?rev=269218&root=gcc&view=rev
Log:
        PR rtl-optimization/87761
        * regcprop.c (copyprop_hardreg_forward_1): Use REG_UNUSED notes to
        detect obviously dead insns and delete them.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/regcprop.c