[Bug rtl-optimization/85645] [7 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2348

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85645

--- Comment #16 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Aug 13 17:05:48 2018
New Revision: 263509

URL: https://gcc.gnu.org/viewcvs?rev=263509&root=gcc&view=rev
Log:
        Backport from mainline
        2018-05-09  Segher Boessenkool  <seg...@kernel.crashing.org>

        PR rtl-optimization/85645
        * regrename.c (build_def_use): Also kill the chains that include the
        destination of a REG_CFA_REGISTER note.

        PR rtl-optimization/85645
        *  regcprop.c (copyprop_hardreg_forward_1): Don't propagate into an
        insn that has a REG_CFA_REGISTER note.

Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/regcprop.c
    branches/gcc-7-branch/gcc/regrename.c