[Bug middle-end/43853] New: [4.6 Regression] FAIL: gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o

[Bug middle-end/43853] New: [4.6 Regression] FAIL: gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o

[hjl dot tools at gmail dot com]

On Linux/x86, revision 158610 gave

FAIL: gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o link, 
(internal compiler error)

Revision 158595 is OK.


-- 
           Summary: [4.6 Regression] FAIL: gcc.dg/lto/20090126-1
                    c_lto_20090126-1_0.o-c_lto_20090126-1_0.o
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43853

[Bug middle-end/43853] [4.6 Regression] FAIL: gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu dot
                   |                            |org
   Target Milestone|---                         |4.6.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43853

[Bug middle-end/43853] [4.6 Regression] FAIL: gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o

[hp at gcc dot gnu dot org]

------- Comment #1 from hp at gcc dot gnu dot org  2010-04-29 21:16 -------
I'm unsure whether I should tag along on this PR, because the failing range
(last_worked:first_failed) for cris-elf is 158755:158765, which doesn't include
158610. But, I'm doing it anyhow. From gcc-restresults@ it looks like it's
highly host-dependent, but occurring for many targets. My host system is
running Fedora 12, updated about a month ago, gcc-4.4.3-4.fc12.x86_64,
binutils-2.19.51.0.14-37.fc12.x86_64, glibc-2.11.1-1.x86_64.  The internal
error message in my gcc.log from r158788 is just (besides the usual ICE
message):
lto1: internal compiler error: Segmentation fault


-- 

hp at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hp at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-04-29 21:16:11
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43853

[Bug middle-end/43853] [4.6 Regression] FAIL: gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o

[hubicka at ucw dot cz]

------- Comment #2 from hubicka at ucw dot cz  2010-04-30 08:45 -------
Subject: Re:  [4.6 Regression] FAIL:
        gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o

Hi,
the problem here is that the testcase combine -O0 module into -O3 module.  This
results in optimization summaries to be missing and thus ipa-pure-const reads
in nothing and later ICE on uninitialized datastructure.  I sent patch for this
that I need to modify, just did not get into it. WHOPR needs significant
reorganization (well pretty much rewrite of all WHOPR specific bits) to be
correct and it is difficult to do so without some fallout
- fixing one problem enabling a transform usually uncovers new one.  The
testcase should ICE on release branch alsi when -fwhopr is replaced by -flto
so it is a bug in LTO implementation overall.  Trying to optimize -O0 compiled
modules is in general not very sane anyway.

But it should be attributed to the change enabling ipa-pure-const at -fwhopr.
I will handle this over weekend.

Honza


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43853

[Bug middle-end/43853] [4.6 Regression] FAIL: gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o

[ro at gcc dot gnu dot org]

------- Comment #3 from ro at gcc dot gnu dot org  2010-05-12 15:48 -------
Also happens on i386-pc-solaris2.1[01] and sparc-sun-solaris2.1[01].


-- 

ro at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ro at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43853

[Bug middle-end/43853] [4.6 Regression] FAIL: gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o

[howarth at nitro dot med dot uc dot edu]

------- Comment #4 from howarth at nitro dot med dot uc dot edu  2010-05-23 13:50 -------
*** Bug 44250 has been marked as a duplicate of this bug. ***


-- 

howarth at nitro dot med dot uc dot edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |howarth at nitro dot med dot
                   |                            |uc dot edu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43853

[Bug middle-end/43853] [4.6 Regression] FAIL: gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2010-06-01 12:09 -------
Subject: Bug 43853

Author: rguenth
Date: Tue Jun  1 12:09:16 2010
New Revision: 160099

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160099
Log:
2010-06-01  Richard Guenther  <rguenther@suse.de>

        PR lto/43853
        * ipa-pure-const.c (get_function_state): Hand back varying state
        if we do not have one.
        (has_function_state): New function.
        (duplicate_node_data): Adjust.
        (remove_node_data): Likewise.
        (pure_const_write_summary): Likewise.
        (propagate): Likewise.  Fix typo.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ipa-pure-const.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43853

[Bug middle-end/43853] [4.6 Regression] FAIL: gcc.dg/lto/20090126-1 c_lto_20090126-1_0.o-c_lto_20090126-1_0.o

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2010-06-01 12:18 -------
Fixed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43853