[Bug tree-optimization/38261] New: [4.4 regression] gcc.dg/torture/ipa-pta-1.c & gcc.dg/tree-ssa/alias-2.c fail with -fpic/-fPIC

[Bug tree-optimization/38261] New: [4.4 regression] gcc.dg/torture/ipa-pta-1.c & gcc.dg/tree-ssa/alias-2.c fail with -fpic/-fPIC

[ghazi at gcc dot gnu dot org]

The testcases gcc.dg/torture/ipa-pta-1.c and gcc.dg/tree-ssa/alias-2.c used to
work with -fpic/-fPIC on the trunk, but now fail.  The alias-2.c testcase
worked in 4.2, 4.3 with -fpic/-fPIC also, and the testcase doesn't appear to
have changed.  I think ipa-pta-1.c was added only on the trunk a few months ago
so there's no comparison with previous releases, however it did work on the
trunk up until very recently.

They both passed here:
http://gcc.gnu.org/ml/gcc-testresults/2008-11/msg01383.html

And they both started failing here:
http://gcc.gnu.org/ml/gcc-testresults/2008-11/msg01516.html

Based on the timing, I suspect that the cause is related.


-- 
           Summary: [4.4 regression] gcc.dg/torture/ipa-pta-1.c &
                    gcc.dg/tree-ssa/alias-2.c fail with -fpic/-fPIC
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ghazi at gcc dot gnu dot org
GCC target triplet: x86_64-*-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38261

[Bug tree-optimization/38261] [4.4 Regression] gcc.dg/torture/ipa-pta-1.c & gcc.dg/tree-ssa/alias-2.c fail with -fpic/-fPIC

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.4 regression]            |[4.4 Regression]
                   |gcc.dg/torture/ipa-pta-1.c &|gcc.dg/torture/ipa-pta-1.c &
                   |gcc.dg/tree-ssa/alias-2.c   |gcc.dg/tree-ssa/alias-2.c
                   |fail with -fpic/-fPIC       |fail with -fpic/-fPIC
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38261

[Bug tree-optimization/38261] [4.4 Regression] gcc.dg/torture/ipa-pta-1.c & gcc.dg/tree-ssa/alias-2.c fail with -fpic/-fPIC

[hjl dot tools at gmail dot com]

------- Comment #1 from hjl dot tools at gmail dot com  2008-11-25 16:37 -------
Can you use ./contrib/gcc_update to update your gcc source tree
so that we can tell which revisions you are using? Thanks.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38261

[Bug tree-optimization/38261] [4.4 Regression] gcc.dg/torture/ipa-pta-1.c & gcc.dg/tree-ssa/alias-2.c fail with -fpic/-fPIC

[ghazi at gcc dot gnu dot org]

------- Comment #2 from ghazi at gcc dot gnu dot org  2008-11-27 16:59 -------
(In reply to comment #1)
> Can you use ./contrib/gcc_update to update your gcc source tree
> so that we can tell which revisions you are using? Thanks.

Done, however it only works for 4.3 and trunk, not 4.2.  I assume that's
intentional, i.e. the mechanism in gcc_update never got backported for the 4.2
branch?


-- 

ghazi at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-11-27 16:59:45
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38261

[Bug tree-optimization/38261] [4.4 Regression] gcc.dg/torture/ipa-pta-1.c & gcc.dg/tree-ssa/alias-2.c fail with -fpic/-fPIC

[jakub at gcc dot gnu dot org]

------- Comment #3 from jakub at gcc dot gnu dot org  2008-11-28 10:03 -------
ipa-pta-1.c fails since:
http://gcc.gnu.org/ml/gcc-patches/2008-11/msg00727.html
with -fpic, but gcc is correct and the testcase should be adjusted, it can't
assume the globally available functions will not be overridden.
Ditto for alias-2.c.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2008-11-27 16:59:45         |2008-11-28 10:03:49
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38261

[Bug testsuite/38261] [4.4 Regression] gcc.dg/torture/ipa-pta-1.c & gcc.dg/tree-ssa/alias-2.c fail with -fpic/-fPIC

[jakub at gcc dot gnu dot org]

------- Comment #4 from jakub at gcc dot gnu dot org  2008-11-28 10:12 -------
Subject: Bug 38261

Author: jakub
Date: Fri Nov 28 10:11:18 2008
New Revision: 142256

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=142256
Log:
        PR testsuite/38261
        * gcc.dg/tree-ssa/alias-2.c: Only compile on nonpic targets.
        * gcc.dg/torture/ipa-pta-1.c: Likewise.

Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/torture/ipa-pta-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/alias-2.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38261

[Bug testsuite/38261] [4.4 Regression] gcc.dg/torture/ipa-pta-1.c & gcc.dg/tree-ssa/alias-2.c fail with -fpic/-fPIC

[jakub at gcc dot gnu dot org]

------- Comment #5 from jakub at gcc dot gnu dot org  2008-11-28 10:51 -------
Fixed.


-- 

jakub at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38261