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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/64817] [5 Regression] compilation hangs at -O3 with -g enabled on x86_64-linux-gnu
Date: Sun, 01 Feb 2015 17:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64817

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sun Feb  1 17:26:17 2015
New Revision: 220320

URL: https://gcc.gnu.org/viewcvs?rev=220320&root=gcc&view=rev
Log:
    PR debug/64817
    * cfgexpand.c (deep_ter_debug_map): New variable.
    (avoid_deep_ter_for_debug): New function.
    (expand_debug_expr): If TERed SSA_NAME is in
    deep_ter_debug_map, use the corresponding DEBUG_EXPR_DECL
    instead of trying to expand SSA_NAME's def stmt.
    (expand_debug_locations): When expanding debug bind
    of a DEBUG_EXPR_DECL to corresponding SSA_NAME,
    temporarily remove the DEBUG_EXPR_DECL from deep_ter_debug_map's
    value.
    (pass_expand::execute): Call avoid_deep_ter_for_debug on
    all debug bind stmts.  Delete deep_ter_debug_map after
    expand_debug_location if non-NULL and clear it.

    * gcc.dg/pr64817-1.c: New test.
    * gcc.dg/pr64817-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr64817-1.c
    trunk/gcc/testsuite/gcc.dg/pr64817-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c
    trunk/gcc/testsuite/ChangeLog