[Bug tree-optimization/66413] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[Bug tree-optimization/66413] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66413

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-06-04
                 CC|                            |mpolacek at gcc dot gnu.org
   Target Milestone|---                         |6.0
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.  Started with r222360.

[Bug tree-optimization/66413] [6 Regression] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66413

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.

[Bug tree-optimization/66413] [6 Regression] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66413

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so IPA-CP propagates a constant to fn4 but this function has its parameter
unused (but by debug stmts).  It looks like we have a tree sharing issue here,
as the location while initially stripped, gets substituted back in via

#0  expand_gimple_stmt_1 (stmt=<gimple_assign 0x7ffff6a1ff50>)
    at /space/rguenther/tramp3d/trunk/gcc/cfgexpand.c:3317
3315                if (gimple_has_location (stmt) && CAN_HAVE_LOCATION_P
(rhs))
3316                  SET_EXPR_LOCATION (rhs, gimple_location (stmt));

which is expansion of fn2.constprop (but the same address-expression is
used in fn4.constprop).  The following fixes it for me:

Index: gcc/tree-inline.c
===================================================================
--- gcc/tree-inline.c   (revision 224221)
+++ gcc/tree-inline.c   (working copy)
@@ -3027,7 +3027,7 @@ insert_init_debug_bind (copy_body_data *
        base_stmt = gsi_stmt (gsi);
     }

-  note = gimple_build_debug_bind (tracked_var, value, base_stmt);
+  note = gimple_build_debug_bind (tracked_var, unshare_expr (value),
base_stmt);

   if (bb)
     {

the issue is surely latent on the GCC 5 branch.

[Bug tree-optimization/66413] [6 Regression] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66413

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jun  9 08:06:17 2015
New Revision: 224267

URL: https://gcc.gnu.org/viewcvs?rev=224267&root=gcc&view=rev
Log:
2015-06-09  Richard Biener  <rguenther@suse.de>

        PR middle-end/66413
        * tree-inline.c (insert_init_debug_bind): Unshare value.

        * gcc.dg/torture/pr66413.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr66413.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-inline.c

[Bug tree-optimization/66413] [4.8/4.9/5 Regression] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66413

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |6.0
   Target Milestone|6.0                         |4.8.5
            Summary|[6 Regression] ICE at -Os   |[4.8/4.9/5 Regression] ICE
                   |and above with -g enabled   |at -Os and above with -g
                   |on x86_64-linux-gnu         |enabled on x86_64-linux-gnu

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk - I'm going to schedule this for a backport as such issues can
cause strange GC related issues.  It should be latent everywhere.

[Bug tree-optimization/66413] [4.8/4.9/5 Regression] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66413

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2

[Bug tree-optimization/66413] [4.8/4.9/5 Regression] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66413

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.8.5                       |4.9.3

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
The gcc-4_8-branch is being closed, re-targeting regressions to 4.9.3.

[Bug tree-optimization/66413] [4.9/5 Regression] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66413

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jun 23 10:02:38 2015
New Revision: 224831

URL: https://gcc.gnu.org/viewcvs?rev=224831&root=gcc&view=rev
Log:
2015-06-23  Richard Biener  <rguenther@suse.de>

        Backport from mainline
        2015-06-09  Richard Biener  <rguenther@suse.de>

        PR middle-end/66413
        * tree-inline.c (insert_init_debug_bind): Unshare value.

        * gcc.dg/torture/pr66413.c: New testcase.

Added:
    branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr66413.c
Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/testsuite/ChangeLog
    branches/gcc-5-branch/gcc/tree-inline.c

[Bug tree-optimization/66413] [4.9 Regression] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66413

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.9.3 has been released.

[Bug tree-optimization/66413] [4.9 Regression] ICE at -Os and above with -g enabled on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66413

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.9.3                       |4.9.4