[Bug bootstrap/50665] New: [4.7 Regression] Bootstrap failure

[Bug bootstrap/50665] New: [4.7 Regression] Bootstrap failure

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

             Bug #: 50665
           Summary: [4.7 Regression] Bootstrap failure
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com


On Linux/ia32, revision 179703 gave:

checking for stdlib.h... ../../src-trunk/libcpp/lex.c: In function 'const
uchar* search_line_sse42(const uchar*, const uchar*)':
../../src-trunk/libcpp/lex.c:466:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Revision 179695 is OK.

[Bug bootstrap/50665] [4.7 Regression] Bootstrap failure

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2011-10-08 19:23:54 UTC ---
This may be another target optimization bug:

[hjl@gnu-1 prev-gcc]$ cat /tmp/x.i
const char *
__attribute__((__target__("ssse3")))
foo (const char *s)
{
  return s;
}
[hjl@gnu-1 prev-gcc]$ ./xgcc -B./ -S /tmp/x.i -o /tmp/x.s
/tmp/x.i: In function \u2018foo\u2019:
/tmp/x.i:6:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-1 prev-gcc]$

[Bug bootstrap/50665] [4.7 Regression] Bootstrap failure

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2011-10-08 20:12:37 UTC ---
Program received signal SIGSEGV, Segmentation fault.
df_ref_create_structure (cl=DF_REF_ARTIFICIAL, collection_rec=0xffffd110, 
    reg=0xafafafaf, loc=0x0, bb=0xf7dae000, info=0x0, ref_type=DF_REF_REG_DEF, 
    ref_flags=0) at ../../src-trunk/gcc/df-scan.c:2755
2755      int regno = REGNO (GET_CODE (reg) == SUBREG ? SUBREG_REG (reg) :
reg);
Missing separate debuginfos, use: debuginfo-install glibc-2.14.90-9.1.f15.i686
gmp-4.3.2-3.fc15.i686 libgcc-4.6.0-10.fc15.i686
libmpc-0.8.3-0.3.svn855.fc15.i686 libstdc++-4.6.0-10.fc15.i686
mpfr-3.0.0-4.fc15.i686 zlib-1.2.5-3.fc15.i686
(gdb)  bt
#0  df_ref_create_structure (cl=DF_REF_ARTIFICIAL, collection_rec=0xffffd110, 
    reg=0xafafafaf, loc=0x0, bb=0xf7dae000, info=0x0, ref_type=DF_REF_REG_DEF, 
    ref_flags=0) at ../../src-trunk/gcc/df-scan.c:2755
#1  0x0827c04c in df_ref_record (cl=DF_REF_ARTIFICIAL, 
    collection_rec=0xffffd110, reg=<optimized out>, loc=0x0, bb=0xf7dae000, 
    insn_info=0x0, ref_type=DF_REF_REG_DEF, ref_flags=0)
    at ../../src-trunk/gcc/df-scan.c:2888
#2  0x0827c2ef in df_entry_block_defs_collect (collection_rec=0xffffd110, 
    entry_block_defs=<optimized out>) at ../../src-trunk/gcc/df-scan.c:3823
#3  0x0827c35c in df_record_entry_block_defs (entry_block_defs=0x8f2ea28)
    at ../../src-trunk/gcc/df-scan.c:3839
#4  0x0827f7ec in df_scan_blocks () at ../../src-trunk/gcc/df-scan.c:670
#5  0x0826dc77 in rest_of_handle_df_initialize ()
    at ../../src-trunk/gcc/df-core.c:738
#6  0x084990cc in execute_one_pass (pass=0x8d485c0)
    at ../../src-trunk/gcc/passes.c:2064
#7  0x08499435 in execute_pass_list (pass=0x8d485c0)
    at ../../src-trunk/gcc/passes.c:2119
#8  0x08499448 in execute_pass_list (pass=0x8d493c0)
    at ../../src-trunk/gcc/passes.c:2120
#9  0x085af6d7 in tree_rest_of_compilation (fndecl=0xf7d7b580)
    at ../../src-trunk/gcc/tree-optimize.c:420
#10 0x0825254f in cgraph_expand_function (node=0xf7ce83d8)
---Type <return> to continue, or q <return> to quit---
    at ../../src-trunk/gcc/cgraphunit.c:1805
#11 0x08254733 in cgraph_output_in_order ()
    at ../../src-trunk/gcc/cgraphunit.c:1962
#12 cgraph_optimize () at ../../src-trunk/gcc/cgraphunit.c:2136
#13 0x08254abf in cgraph_finalize_compilation_unit ()
    at ../../src-trunk/gcc/cgraphunit.c:1312
#14 0x0812f650 in c_write_global_declarations ()
    at ../../src-trunk/gcc/c-decl.c:9936
#15 0x0854432a in compile_file () at ../../src-trunk/gcc/toplev.c:581
#16 do_compile () at ../../src-trunk/gcc/toplev.c:1925
#17 toplev_main (argc=13, argv=0xffffd404) at ../../src-trunk/gcc/toplev.c:2001
#18 0x0811012b in main (argc=13, argv=0xffffd404)
    at ../../src-trunk/gcc/main.c:36
(gdb)

[Bug bootstrap/50665] [4.7 Regression] Bootstrap failure

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rth at gcc dot gnu.org

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2011-10-08 22:49:14 UTC ---
[hjl@gnu-1 gcc]$ cat x.i
const char *
foo (const char *s)
{
  return s;
}
[hjl@gnu-1 gcc]$ ./xgcc -B./ -S x.i -o /tmp/x.s -mssse3
x.i: In function \u2018foo\u2019:
x.i:5:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-1 gcc]$ 

Somehow

Continuing.
Hardware watchpoint 9: default_target_regs.x_hard_regno_nregs[31][DImode]

Old value = 1 '\001'
New value = 255 '\377'
init_all_optabs () at insn-opinit.c:1543
1543        set_direct_optab_handler (vec_perm_optab, V2DImode,
CODE_FOR_vec_permv2di);

overwrites default_target_regs.x_hard_regno_nregs[31][DImode].

[Bug bootstrap/50665] [4.7 Regression] Bootstrap failure

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.0

[Bug bootstrap/50665] [4.7 Regression] Bootstrap failure

[doko at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

Matthias Klose <doko at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |doko at gcc dot gnu.org

--- Comment #4 from Matthias Klose <doko at gcc dot gnu.org> 2011-10-10 12:47:41 UTC ---
seen as well on i686-linux-gnu. x86_64-linux-gnu builds fine

[Bug bootstrap/50665] [4.7 Regression] Bootstrap failure

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1

[Bug bootstrap/50665] [4.7 Regression] Bootstrap failure

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

Uros Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011-10-10
         AssignedTo|unassigned at gcc dot       |ubizjak at gmail dot com
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #5 from Uros Bizjak <ubizjak at gmail dot com> 2011-10-10 16:47:48 UTC ---
Ouch.

Index: optabs.h
===================================================================
--- optabs.h    (revision 179754)
+++ optabs.h    (working copy)
@@ -377,9 +377,6 @@
   OTI_vec_pack_sfix_trunc,
   OTI_vec_pack_ufix_trunc,

-  /* Vector shuffling.  */
-  OTI_vec_perm,
-
   /* Perform a raise to the power of integer.  */
   OTI_powi,

@@ -560,7 +557,6 @@
 #define vec_pack_usat_optab (&optab_table[OTI_vec_pack_usat])
 #define vec_pack_sfix_trunc_optab (&optab_table[OTI_vec_pack_sfix_trunc])
 #define vec_pack_ufix_trunc_optab (&optab_table[OTI_vec_pack_ufix_trunc])
-#define vec_perm_optab (&direct_optab_table[(int) OTI_vec_perm])

 #define powi_optab (&optab_table[OTI_powi])

@@ -689,6 +685,9 @@
   /* Atomic clear with release semantics.  */
   DOI_sync_lock_release,

+  /* Vector shuffling.  */
+  DOI_vec_perm,
+
   DOI_MAX
 };

@@ -734,6 +733,7 @@
   (&direct_optab_table[(int) DOI_sync_lock_test_and_set])
 #define sync_lock_release_optab \
   (&direct_optab_table[(int) DOI_sync_lock_release])
+#define vec_perm_optab (&direct_optab_table[(int) DOI_vec_perm])


 /* Target-dependent globals.  */
 struct target_optabs {

[Bug bootstrap/50665] [4.7 Regression] Bootstrap failure

[uros at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

--- Comment #6 from uros at gcc dot gnu.org 2011-10-10 17:04:46 UTC ---
Author: uros
Date: Mon Oct 10 17:04:41 2011
New Revision: 179763

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179763
Log:
    PR bootstrap/50665
    * optabs.h (DOI_vec_perm): Rename from OTI_vec_perm.  Move from enum
    optab_index to enum direct_optab_index.
    (vec_perm_optab): Update.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/optabs.h

[Bug bootstrap/50665] [4.7 Regression] Bootstrap failure

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

Uros Bizjak <ubizjak at gmail dot com> changed:

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

--- Comment #7 from Uros Bizjak <ubizjak at gmail dot com> 2011-10-10 17:08:47 UTC ---
Fixed.

[Bug bootstrap/50665] [4.7 Regression] Bootstrap failure

[markus at trippelsdorf dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50665

Markus Trippelsdorf <markus at trippelsdorf dot de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |markus at trippelsdorf dot
                   |                            |de

--- Comment #8 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2011-10-10 18:32:11 UTC ---
*** Bug 50674 has been marked as a duplicate of this bug. ***