[Bug debug/50299] New: entryval: bigendian 32bit->64bit extension breaks address match

["jan.kratochvil at redhat dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50299

             Bug #: 50299
           Summary: entryval: bigendian 32bit->64bit extension breaks
                    address match
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jan.kratochvil@redhat.com
                CC: jakub@gcc.gnu.org
            Target: s390x-rhel62-linux-gnu


archer-jankratochvil-entryval:
f (r1=r1@entry=1, r2=r2@entry=2, r3=r3@entry=3, r4=r4@entry=4, r5=r5@entry=5,
s1=11) at 1.c:5
5    }
(gdb) p s1@entry
Cannot find matching parameter at DW_TAG_GNU_call_site 0x80000516 at main

static void __attribute__ ((noinline, noclone))
f (int r1, int r2, int r3, int r4, int r5, int s1)
{
  asm volatile ("" ::: "memory");
}
int
main (void)
{
  f (1, 2, 3, 4, 5, 11);
  return 0;
}

-Wall -g -O2
gcc (GCC) 4.7.0 20110805 (experimental)

In main() it is 8 bytes at %r15+160 but in f() it is 4 bytes at %r15+164.
160 != 164 and GDB cannot know how many bytes it is in main(), there is no
parameter width anywhere there.


    80000502:   e3 10 f0 a0 00 24    stg     %r1,160(%r15)
    80000510:   c0 e5 ff ff ff ea    brasl   %r14,800004e4 <f>
 <2><c3>: Abbrev Number: 6 (DW_TAG_GNU_call_site)
    <c4>   DW_AT_low_pc      : 0x80000516
    <cc>   DW_AT_abstract_origin: <0x31>
 <3><ea>: Abbrev Number: 7 (DW_TAG_GNU_call_site_parameter)
    <eb>   DW_AT_location    : 3 byte block: 7f a0 1    (DW_OP_breg15 (r15):
160)
    <ef>   DW_AT_GNU_call_site_value: 1 byte block: 3b  (DW_OP_lit11)
 <2><8c>: Abbrev Number: 3 (DW_TAG_formal_parameter)
    <8d>   DW_AT_name        : s1
    <92>   DW_AT_type        : <0x9a>
    <96>   DW_AT_location    : 2 byte block: 91 4    (DW_OP_fbreg: 4)
 <1><9a>: Abbrev Number: 4 (DW_TAG_base_type)
    <9b>   DW_AT_byte_size   : 4
    <9d>   DW_AT_name        : int
 <1><31>: Abbrev Number: 2 (DW_TAG_subprogram)
    <32>   DW_AT_name        : f
    <47>   DW_AT_frame_base  : 3 byte block: 7f a0 1    (DW_OP_breg15 (r15):
160)