[Bug lto/47264] New: [4.6 Regression] Many tests fail with -flto due unaligned load in lto-plugin.c

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47264

           Summary: [4.6 Regression] Many tests fail with -flto due
                    unaligned load in lto-plugin.c
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: danglin@gcc.gnu.org
              Host: hppa-unknown-linux-gnu
            Target: hppa-unknown-linux-gnu
             Build: hppa-unknown-linux-gnu


FAIL: gcc.c-torture/execute/builtins/20010124-1.c compilation,  -O2 -flto
-flto-
partition=none 
FAIL: gcc.c-torture/execute/builtins/20010124-1.c compilation,  -O2 -flto 
FAIL: gcc.c-torture/execute/builtins/abs-1.c compilation,  -O2 -flto
-flto-parti
tion=none 
FAIL: gcc.c-torture/execute/builtins/abs-1.c compilation,  -O2 -flto 
FAIL: gcc.c-torture/execute/builtins/abs-2.c compilation,  -O2 -flto
-flto-parti
tion=none 
FAIL: gcc.c-torture/execute/builtins/abs-2.c compilation,  -O2 -flto 
FAIL: gcc.c-torture/execute/builtins/abs-3.c compilation,  -O2 -flto
-flto-parti
tion=none 
FAIL: gcc.c-torture/execute/builtins/abs-3.c compilation,  -O2 -flto 
FAIL: gcc.c-torture/execute/builtins/complex-1.c compilation,  -O2 -flto
-flto-p
artition=none 
FAIL: gcc.c-torture/execute/builtins/complex-1.c compilation,  -O2 -flto 
FAIL: gcc.c-torture/execute/builtins/fprintf.c compilation,  -O2 -flto
-flto-par
tition=none 
FAIL: gcc.c-torture/execute/builtins/fprintf.c compilation,  -O2 -flto 
FAIL: gcc.c-torture/execute/builtins/fputs.c compilation,  -O2 -flto
-flto-parti
tion=none 
FAIL: gcc.c-torture/execute/builtins/fputs.c compilation,  -O2 -flto 
FAIL: gcc.c-torture/execute/builtins/memchr.c compilation,  -O2 -flto
-flto-part
ition=none 
...

Executing on host: /home2/dave/gcc-4.6/objdir/gcc/xgcc
-B/home2/dave/gcc-4.6/obj
dir/gcc/
/home2/dave/gcc-4.6/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/20
010124-1.c
/home2/dave/gcc-4.6/gcc/gcc/testsuite/gcc.c-torture/execute/builtins/
20010124-1-lib.c
/home2/dave/gcc-4.6/gcc/gcc/testsuite/gcc.c-torture/execute/bui
ltins/lib/main.c  -w  -O2 -flto -flto-partition=none   -lm   -o
/home2/dave/gcc-
4.6/objdir/gcc/testsuite/gcc/20010124-1.x6    (timeout = 300)
collect2: ld terminated with signal 10 [Bus error], core dumped
compiler exited with status 1
output is:
collect2: ld terminated with signal 10 [Bus error], core dumped

FAIL: gcc.c-torture/execute/builtins/20010124-1.c compilation,  -O2 -flto
-flto-
partition=none 

dave@gsyprf11:~/gcc-4.6/objdir/gcc/testsuite/gcc$ gdb -c core.save
/home2/dave/opt/gnu/bin/ld
GNU gdb (GDB) 7.2.50.20101119-cvs
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "hppa-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home2/dave/opt/gnu/bin/ld...done.
BFD: Warning: /home2/dave/gcc-4.6/objdir/gcc/testsuite/gcc/core.save is
truncated: expected core file size >= 1998848, found: 1871872.
[New LWP 29059]
Reading symbols from /usr/lib/libz.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/ld.so.1
Reading symbols from /home2/dave/gcc-4.6/objdir/gcc/liblto_plugin.so...done.
Loaded symbols for /home2/dave/gcc-4.6/objdir/gcc/liblto_plugin.so
Core was generated by `/home2/dave/opt/gnu/bin/ld -plugin
/home2/dave/gcc-4.6/objdir/gcc/liblto_plugin'.
Program terminated with signal 10, Bus error.
#0  parse_table_entry (entry=0x122c28, p=<value optimized out>, 
    aux=<value optimized out>) at ../../gcc/lto-plugin/lto-plugin.c:252
252      entry->size = *(uint64_t *) p;
(gdb) p/x $pc
$2 = 0x403df3d8
(gdb) disass 0x403df3c8,0x403df3e8
Dump of assembler code from 0x403df3c8 to 0x403df3e8:
   0x403df3c8 <process_symtab+948>:    ldw,s r5(r6),ret0
   0x403df3cc <process_symtab+952>:    stw ret0,-10(r9)
   0x403df3d0 <process_symtab+956>:    ldi -1,r20
   0x403df3d4 <process_symtab+960>:    copy r4,r19
=> 0x403df3d8 <process_symtab+964>:    ldw 3(r17),ret0
   0x403df3dc <process_symtab+968>:    ldw 7(r17),ret1
   0x403df3e0 <process_symtab+972>:    stw ret0,-c(r9)
   0x403df3e4 <process_symtab+976>:    stw ret1,-8(r9)
End of assembler dump.
(gdb) p/x $r17
$3 = 0x122b4c