[Bug rtl-optimization/84614] [8 Regression] wrong code with u16->u128 extension at aarch64 -fno-split-wide-types -g3 --param=max-combine-insns=3

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84614

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Mar  2 09:16:50 2018
New Revision: 258129

URL: https://gcc.gnu.org/viewcvs?rev=258129&root=gcc&view=rev
Log:
        PR target/84614
        * rtl.h (prev_real_nondebug_insn, next_real_nondebug_insn): New
        prototypes.
        * emit-rtl.c (next_real_insn, prev_real_insn): Fix up function
        comments.
        (next_real_nondebug_insn, prev_real_nondebug_insn): New functions.
        * cfgcleanup.c (try_head_merge_bb): Use prev_real_nondebug_insn
        instead of a loop around prev_real_insn.
        * combine.c (move_deaths): Use prev_real_nondebug_insn instead of
        prev_real_insn.

        * gcc.dg/pr84614.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr84614.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgcleanup.c
    trunk/gcc/combine.c
    trunk/gcc/emit-rtl.c
    trunk/gcc/rtl.h
    trunk/gcc/testsuite/ChangeLog