[Bug target/36745] New: [4.4 Regression] ICE in gen_reg_rtx, at emit-rtl.c:868

[Bug target/36745] New: [4.4 Regression] ICE in gen_reg_rtx, at emit-rtl.c:868

[rguenth at gcc dot gnu dot org]

Trunk fails to build Qt4 on both s390 and s390x.

./cc1plus -quiet -O2 -fPIC qregexp.3.ii 
qregexp.3.ii: In member function 'void QVector<T>::realloc(int, int) [with T =
QRegExpAutomatonState]':
qregexp.3.ii:99: internal compiler error: in gen_reg_rtx, at emit-rtl.c:868
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


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           Summary: [4.4 Regression] ICE in gen_reg_rtx, at emit-rtl.c:868
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org
GCC target triplet: s390-*-*, s390x-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36745

[Bug target/36745] [4.4 Regression] ICE in gen_reg_rtx, at emit-rtl.c:868

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |krebbel at gcc dot gnu dot
                   |                            |org
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36745

[Bug target/36745] [4.4 Regression] ICE in gen_reg_rtx, at emit-rtl.c:868

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2008-07-06 18:24 -------
Created an attachment (id=15864)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15864&action=view)
testcase

Testcase reduced with a cross from x86_64 to s390x.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36745

[Bug target/36745] [4.4 Regression] ICE in gen_reg_rtx, at emit-rtl.c:868

[mueller at gcc dot gnu dot org]

------- Comment #2 from mueller at gcc dot gnu dot org  2008-07-07 09:00 -------
Created an attachment (id=15868)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15868&action=view)
slightly shorter (different testcase, same bug)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36745

[Bug target/36745] [4.4 Regression] ICE in gen_reg_rtx, at emit-rtl.c:868

[krebbel at gcc dot gnu dot org]

------- Comment #3 from krebbel at gcc dot gnu dot org  2008-07-07 12:35 -------
The shorter testcase does not fail with -O2 -fPIC on GCC rev. 137553.

But I can confirm the ICE with the first example.  For large GOTs (>4k) we
rewrite a symbol reference as a GOTENT relocation in the LEGITIMIZE_ADDRESS
hook. A reference to the original SYM_REF stays as REG_EQUAL note. The note is
used by GCSE to propagate the SYM_REF directly into the asm operand. So the
legitimize_address hook is called for this operand during reload - since the
fix needs an additional pseudo it crashes.


-- 

krebbel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |krebbel at gcc dot gnu dot
                   |dot org                     |org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-07-07 12:35:23
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36745

[Bug target/36745] [4.4 Regression] ICE in gen_reg_rtx, at emit-rtl.c:868

[krebbel at gcc dot gnu dot org]

------- Comment #4 from krebbel at gcc dot gnu dot org  2008-07-14 06:57 -------
Subject: Bug 36745

Author: krebbel
Date: Mon Jul 14 06:56:46 2008
New Revision: 137777

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=137777
Log:
2008-07-14  Andreas Krebbel  <krebbel1@de.ibm.com>

        PR target/36745
        * config/s390/s390.c: (s390_secondary_reload): Add a secondary
        reload for symbol refs moved to r0 with -fPIC.
        (legitimize_pic_address): Use the target register as temporary
        reg if possible.
        (emit_symbolic_move): Adjust comment.
        * config/s390/s390.md (reloadsi_PIC_addr, reloaddi_PIC_addr):
        New expanders.

2008-07-14  Andreas Krebbel  <krebbel1@de.ibm.com>

        PR target/36745
        * g++.dg/torture/pr36745.C: New testcase.



Added:
    trunk/gcc/testsuite/g++.dg/torture/pr36745.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/s390/s390.c
    trunk/gcc/config/s390/s390.md
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36745

[Bug target/36745] [4.4 Regression] ICE in gen_reg_rtx, at emit-rtl.c:868

[jakub at gcc dot gnu dot org]

------- Comment #5 from jakub at gcc dot gnu dot org  2008-07-14 13:47 -------
Subject: Bug 36745

Author: jakub
Date: Mon Jul 14 13:46:25 2008
New Revision: 137785

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=137785
Log:
        PR target/36745
        * g++.dg/torture/pr36745.C: Use __SIZE_TYPE__ in size_t typedef.

Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/torture/pr36745.C


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36745

[Bug target/36745] [4.4 Regression] ICE in gen_reg_rtx, at emit-rtl.c:868

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2008-07-18 16:59 -------
Fixed I guess.


-- 

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=36745