[Bug middle-end/34744] New: Memory leaks in compiler with empty program

[Bug middle-end/34744] New: Memory leaks in compiler with empty program

[jvdelisle at gcc dot gnu dot org]

Memory leak with empty Fortran programs: latest trunk

Given:

program gamsanal
end

$ valgrind --leak-check=full f951 pr34722.f90

==20839== 1,408 bytes in 20 blocks are definitely lost in loss record 2 of 6
==20839==    at 0x4A059F6: malloc (vg_replace_malloc.c:149)
==20839==    by 0xB1B567: xmalloc (xmalloc.c:147)
==20839==    by 0x51E842: df_install_refs (df-scan.c:2425)
==20839==    by 0x51EADA: df_refs_add_to_chains (df-scan.c:2551)
==20839==    by 0x52029F: df_record_exit_block_uses (df-scan.c:3808)
==20839==    by 0x5218D0: df_scan_blocks (df-scan.c:597)
==20839==    by 0x51499D: rest_of_handle_df_initialize (df-core.c:742)
==20839==    by 0x65C925: execute_one_pass (passes.c:1118)
==20839==    by 0x65CAEB: execute_pass_list (passes.c:1171)
==20839==    by 0x65CAFD: execute_pass_list (passes.c:1172)
==20839==    by 0x735345: tree_rest_of_compilation (tree-optimize.c:404)
==20839==    by 0x8E55E1: cgraph_expand_function (cgraphunit.c:1152)
==20839== 
==20839== LEAK SUMMARY:
==20839==    definitely lost: 1,408 bytes in 20 blocks.
==20839==      possibly lost: 64 bytes in 2 blocks.
==20839==    still reachable: 297,659 bytes in 951 blocks.
==20839==         suppressed: 0 bytes in 0 blocks.
==20839== Reachable blocks (those to which a pointer was found) are not shown.
==20839== To see them, rerun with: --leak-check=full --show-reachable=yes


-- 
           Summary: Memory leaks in compiler with empty program
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jvdelisle at gcc dot gnu dot org
  GCC host triplet: x86-64-linux-gni


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34744

[Bug middle-end/34744] Memory leaks in compiler with empty program

[zadeck at naturalbridge dot com]

------- Comment #1 from zadeck at naturalbridge dot com  2008-01-12 13:16 -------
I know what this bug is but i do not actually know how to find it.  The bug is
caused by someone abandoning a basic block without going thur the api to
properly delete it or merge it into another block.

any suggestions on how to track this down would be appreciated.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34744

[Bug middle-end/34744] Memory leaks in compiler with empty program

[zadeck at naturalbridge dot com]

------- Comment #2 from zadeck at naturalbridge dot com  2008-07-01 13:53 -------
Fixed as revision 137284 and 137285.


-- 

zadeck at naturalbridge dot com changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34744

[Bug middle-end/34744] Memory leaks in compiler with empty program

[zadeck at gcc dot gnu dot org]

------- Comment #3 from zadeck at gcc dot gnu dot org  2008-07-01 13:57 -------
Subject: Bug 34744

Author: zadeck
Date: Tue Jul  1 13:56:28 2008
New Revision: 137318

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=137318
Log:
Marked changelog entry with PR rtl-optimization/34744

Modified:
    trunk/gcc/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34744

[Bug middle-end/34744] Memory leaks in compiler with empty program

[zadeck at gcc dot gnu dot org]

------- Comment #4 from zadeck at gcc dot gnu dot org  2008-07-01 14:06 -------
Subject: Bug 34744

Author: zadeck
Date: Tue Jul  1 14:05:13 2008
New Revision: 137319

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=137319
Log:
2008-07-01  Kenneth Zadeck <zadeck@naturalbridge.com>

        PR rtl-optimization/34744
        * df-scan.c (df_scan_free_ref_vec, df_scan_free_mws_vec): New
        macros.
        (df_scan_free_internal): Free data structures not
        allocated in storage pools.
        (df_mw_hardreg_chain_delete_eq_uses): Use df_scan_free_mws_vec.
        (df_refs_add_to_chains): Use df_scan_free_ref_vec and 
        df_scan_free_mws_vec.
        * dse.c (dse_step6): Free offset_map_p and offset_map_n
        unconditionally.
        * ifcvt.c (cond_move_process_if_block): Free vectors on false
        return.



Modified:
    branches/gcc-4_3-branch/gcc/ChangeLog
    branches/gcc-4_3-branch/gcc/df-scan.c
    branches/gcc-4_3-branch/gcc/dse.c
    branches/gcc-4_3-branch/gcc/ifcvt.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34744