[Bug tree-optimization/44181] New: -fcompare-debug failure (length) with -Os -fgraphite-identity

[Bug tree-optimization/44181] New: -fcompare-debug failure (length) with -Os -fgraphite-identity

[zsojka at seznam dot cz]

Compiler flags:
g++ -Os -fgraphite-identity -fcompare-debug testcase.c

Tested revisions:
r159511 - fail
r159045 - fail
r158095 - fail


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           Summary: -fcompare-debug failure (length) with -Os -fgraphite-
                    identity
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44181

[Bug tree-optimization/44181] -fcompare-debug failure (length) with -Os -fgraphite-identity

[zsojka at seznam dot cz]

------- Comment #1 from zsojka at seznam dot cz  2010-05-17 23:45 -------
Created an attachment (id=20691)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20691&action=view)
reduced testcase (from gcc.c-torture/compile/pr43415.c)

$ /mnt/svn/gcc-trunk/binary-158095-lto-fortran/bin/g++ -Os -fgraphite-identity
-fcompare-debug pr44181.c
g++: pr44181.c: -fcompare-debug failure (length)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44181

[Bug tree-optimization/44181] -fcompare-debug failure (length) with -Os -fgraphite-identity

[aoliva at gcc dot gnu dot org]

------- Comment #2 from aoliva at gcc dot gnu dot org  2010-06-11 12:23 -------
Mine


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aoliva at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |aoliva at gcc dot gnu dot
                   |dot org                     |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44181

[Bug tree-optimization/44181] -fcompare-debug failure (length) with -Os -fgraphite-identity

[aoliva at gcc dot gnu dot org]

------- Comment #3 from aoliva at gcc dot gnu dot org  2010-06-11 12:23 -------
Created an attachment (id=20887)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20887&action=view)
Patch that fixes the problem

Here's the patch I'm testing now.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44181

[Bug tree-optimization/44181] -fcompare-debug failure (length) with -Os -fgraphite-identity

[aoliva at gcc dot gnu dot org]

------- Comment #4 from aoliva at gcc dot gnu dot org  2010-06-11 12:28 -------
*** Bug 44247 has been marked as a duplicate of this bug. ***


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44181

[Bug debug/44181] -fcompare-debug failure (length) with -Os -fgraphite-identity

[aoliva at gcc dot gnu dot org]

------- Comment #5 from aoliva at gcc dot gnu dot org  2010-06-11 12:56 -------
*** Bug 43650 has been marked as a duplicate of this bug. ***


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44181

[Bug debug/44181] -fcompare-debug failure (length) with -Os -fgraphite-identity

[aoliva at gcc dot gnu dot org]

------- Comment #6 from aoliva at gcc dot gnu dot org  2010-06-14 19:18 -------
Subject: Bug 44181

Author: aoliva
Date: Mon Jun 14 19:18:18 2010
New Revision: 160762

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160762
Log:
PR debug/43650
PR debug/44181
PR debug/44247
* tree-ssa-loop-manip.c (tree_transform_and_unroll_loop): Skip
debug stmts.
(canonicalize_loop_ivs): Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-loop-manip.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44181

[Bug debug/44181] -fcompare-debug failure (length) with -Os -fgraphite-identity

[aoliva at gcc dot gnu dot org]

------- Comment #7 from aoliva at gcc dot gnu dot org  2010-06-14 19:22 -------
Fixed


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aoliva at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44181