[Bug rtl-optimization/79405] [7 Regression] Compile-time hog w/ -O2 (-Os, -O3) on 32-bit BE powerpc targets

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79405

--- Comment #8 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Fri Mar 31 22:49:53 2017
New Revision: 246627

URL: https://gcc.gnu.org/viewcvs?rev=246627&root=gcc&view=rev
Log:
        PR rtl-optimization/79405
        * fwprop.c (propagations_left): New variable.
        (forward_propagate_into): Decrement it.
        (fwprop_init): Initialize it.
        (fw_prop): If the variable has reached zero, stop propagating.
        (fwprop_addr): Ditto.

gcc/testsuite/
        PR rtl-optimization/79405
        gcc.dg/pr79405.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/pr79405.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fwprop.c
    trunk/gcc/testsuite/ChangeLog