[Bug rtl-optimization/77919] [5/6 Regression] ICE converting DC to V2DF mode

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77919

--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Dec  7 22:45:33 2016
New Revision: 243395

URL: https://gcc.gnu.org/viewcvs?rev=243395&root=gcc&view=rev
Log:
        Backported from mainline
        2016-10-29  Jakub Jelinek  <jakub@redhat.com>

        PR rtl-optimization/77919
        * expr.c (expand_expr_real_1) <normal_inner_ref>: Only avoid forcing
        into memory if both modes are complex and their inner modes have the
        same precision.  If the two modes are different complex modes, convert
        each part separately and generate a new CONCAT.

        * g++.dg/torture/pr77919-2.C: New test.

Added:
    branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr77919-2.C
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/expr.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog