[Bug bootstrap/40753] New: ICE in refs_may_alias_p_1 for libffi/src/powerpc/ffi.c

[Bug bootstrap/40753] New: ICE in refs_may_alias_p_1 for libffi/src/powerpc/ffi.c

[janis at gcc dot gnu dot org]

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Compiling libffi/src/powerpc/ffi.c as part of a bootstrap for powerpc*-*-linux*
fails starting with this patch:

    http://gcc.gnu.org/viewcvs?view=rev&rev=149624

    r149624 | rguenth | 2009-07-14 09:59:18 +0000 (Tue, 14 Jul 2009)

This minimized testcase demonstrates the problem:

--------------------------------------------------------------
typedef long unsigned int size_t;
typedef struct {
  unsigned nargs;
} ffi_cif;
typedef struct {
  char tramp[24];
  ffi_cif *cif;
} ffi_closure;
extern void *memcpy (void *, const void *, size_t);
extern void ffi_closure_LINUX64 (void);

int
ffi_prep_closure_loc (ffi_closure *closure, ffi_cif *cif)
{
  void **tramp = (void **) &closure->tramp[0];

  memcpy (tramp, (char *) ffi_closure_LINUX64, 16);
  closure->cif = cif;

  return 0;
}
--------------------------------------------------------------

elm3b149% /home/janis/build/build-gcc-trunk-anonsvn/gcc/cc1 -quiet -O2
bug0714.c
bug0714.c: In function ‘ffi_prep_closure_loc’:
bug0714.c:21:1: internal compiler error: in refs_may_alias_p_1, at
tree-ssa-alias.c:746
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


-- 
           Summary: ICE in refs_may_alias_p_1 for libffi/src/powerpc/ffi.c
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc*-*-linux*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40753

[Bug bootstrap/40753] [4.5 Regression] ICE in refs_may_alias_p_1 for libffi/src/powerpc/ffi.c

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2009-07-14 21:46 -------
Obviously mine.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rguenth at gcc dot gnu dot
                   |dot org                     |org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-07-14 21:46:29
               date|                            |
            Summary|ICE in refs_may_alias_p_1   |[4.5 Regression] ICE in
                   |for libffi/src/powerpc/ffi.c|refs_may_alias_p_1 for
                   |                            |libffi/src/powerpc/ffi.c
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40753

[Bug bootstrap/40753] [4.5 Regression] ICE in refs_may_alias_p_1 for libffi/src/powerpc/ffi.c

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2009-07-14 21:58 -------
Huh, we end up with a FUNCTION_DECL here, from

(gdb) call debug_rtx (mem)
(mem/c/i:SI (const:SI (plus:SI (symbol_ref:SI ("ffi_closure_LINUX64") [flags
0x41] <function_decl 0xb7d4ec80 ffi_closure_LINUX64>)
            (const_int 12 [0xc]))) [0 ffi_closure_LINUX64+12 S4 A8])

that doesn't make much sense but is easy to fix.

Index: alias.c
===================================================================
--- alias.c     (revision 149643)
+++ alias.c     (working copy)
@@ -279,6 +279,11 @@ ao_ref_from_mem (ao_ref *ref, const_rtx 
       && TREE_CODE (TREE_OPERAND (base, 0)) != SSA_NAME)
     return false;

+  /* The tree oracle doesn't like to have these.  */
+  if (TREE_CODE (base) == FUNCTION_DECL
+      || TREE_CODE (base) == LABEL_DECL)
+    return false;
+
   /* If this is a reference based on a partitioned decl replace the
      base with an INDIRECT_REF of the pointer representative we
      created during stack slot partitioning.  */


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40753

[Bug bootstrap/40753] [4.5 Regression] ICE in refs_may_alias_p_1 for libffi/src/powerpc/ffi.c

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2009-07-15 09:25 -------
Subject: Bug 40753

Author: rguenth
Date: Wed Jul 15 09:25:34 2009
New Revision: 149664

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=149664
Log:
2009-07-15  Richard Guenther  <rguenther@suse.de>

        PR middle-end/40753
        * alias.c (ao_ref_from_mem): Reject FUNCTION_DECL and LABEL_DECL
        bases.

        * gcc.c-torture/compile/pr40753.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr40753.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/alias.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40753

[Bug bootstrap/40753] [4.5 Regression] ICE in refs_may_alias_p_1 for libffi/src/powerpc/ffi.c

[rguenth at gcc dot gnu dot org]

------- Comment #4 from rguenth at gcc dot gnu dot org  2009-07-15 09:43 -------
Fixed.


-- 

rguenth at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40753

[Bug bootstrap/40753] [4.5 Regression] ICE in refs_may_alias_p_1 for libffi/src/powerpc/ffi.c

[hjl at gcc dot gnu dot org]

------- Comment #5 from hjl at gcc dot gnu dot org  2009-07-23 17:51 -------
Subject: Bug 40753

Author: hjl
Date: Thu Jul 23 17:50:56 2009
New Revision: 150020

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=150020
Log:
2009-07-23  H.J. Lu  <hongjiu.lu@intel.com>

        Backport from mainline:
        2009-07-22  Richard Guenther  <rguenther@suse.de>

        PR c++/40799
        * g++.dg/lookup/using21.C: New testcase.

        2009-07-19  Jan Hubicka  <jh@suse.cz>

        PR tree-optimization/40676
        * gcc.c-torture/compile/pr40676.c: New testcase.

        2009-07-15  Richard Guenther  <rguenther@suse.de>

        PR middle-end/40753
        * gcc.c-torture/compile/pr40753.c: New testcase.

        2009-07-14  Dodji Seketeli  <dodji@redhat.com>

        PR debug/40705
        * g++.dg/debug/dwarf2/typedef1.C: New test.

        PR c++/40357
        * g++.dg/other/typedef3.C: New test.

        2009-07-10  Richard Guenther  <rguenther@suse.de>

        PR tree-optimization/40496
        * g++.dg/opt/pr40496.C: New testcase.

        2009-07-09  Jakub Jelinek  <jakub@redhat.com>

        PR middle-end/40692
        * gcc.c-torture/compile/pr40692.c: New test.

        2009-07-08  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

        PR libfortran/40330
        PR libfortran/40662
        * gfortran.dg/fmt_cache_1.f: New test.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/debug/dwarf2/typedef1.C
      - copied unchanged from r150018,
trunk/gcc/testsuite/g++.dg/debug/dwarf2/typedef1.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/using21.C
      - copied unchanged from r150018,
trunk/gcc/testsuite/g++.dg/lookup/using21.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/opt/pr40496.C
      - copied unchanged from r150018, trunk/gcc/testsuite/g++.dg/opt/pr40496.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/other/typedef3.C
      - copied unchanged from r150018,
trunk/gcc/testsuite/g++.dg/other/typedef3.C
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr40676.c
      - copied unchanged from r150018,
trunk/gcc/testsuite/gcc.c-torture/compile/pr40676.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr40692.c
      - copied unchanged from r150018,
trunk/gcc/testsuite/gcc.c-torture/compile/pr40692.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr40753.c
      - copied unchanged from r150018,
trunk/gcc/testsuite/gcc.c-torture/compile/pr40753.c
    branches/gcc-4_4-branch/gcc/testsuite/gfortran.dg/fmt_cache_1.f
      - copied unchanged from r150018,
trunk/gcc/testsuite/gfortran.dg/fmt_cache_1.f
Modified:
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40753