[Bug debug/15860] New: [3.3/3.4/3.5 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[Bug debug/15860] New: [3.3/3.4/3.5 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[tausq at debian dot org]

Compile the attached code with "gcc -g -c structs2.c" [structs2.c comes from 
the gdb testsuite]

The arguments to param_reg() are not described in the dwarf debug info. e.g.:
$ readelf -wi structs2.o
[...]
 <2><69>: Abbrev Number: 6 (DW_TAG_formal_parameter)
     DW_AT_name        : (indirect string, offset: 0x27): pr_char
     DW_AT_decl_file   : 1
     DW_AT_decl_line   : 28
     DW_AT_type        : <96>

No DW_AT_location information is given.

With gcc-3.0, I see:
 <2><82>: Abbrev Number: 6 (DW_TAG_formal_parameter)
     DW_AT_name        : pr_char
     DW_AT_decl_file   : 1
     DW_AT_decl_line   : 28
     DW_AT_type        : <cf>
     DW_AT_location    : 2 byte block: 91 b     (DW_OP_fbreg: 11)

param_reg() is defined as:
static void param_reg (register signed char pr_char,
                       register unsigned char pr_uchar,
                       register short pr_short,
                       register unsigned short pr_ushort);

if the "register" qualifier is removed, the correct debug information is 
emitted.

Dan Jacobowitz tells me that on i386/mips, with gcc-3.3, he does not see this 
problem. On hppa-linux i see this with gcc-3.3/3.4/3.5

This was also observed by Corinna Vinschen (sh target):
http://sources.redhat.com/ml/gdb/2004-03/msg00043.html

-- 
           Summary: [3.3/3.4/3.5 regression] No DW_AT_location debug info is
                    emitted for formal arguments to a function that uses
                    "register" qualifiers
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tausq at debian dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: hppa-unknown-linux
  GCC host triplet: hppa-unknown-linux
GCC target triplet: hppa-unknown-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/3.5 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[tausq at debian dot org]

------- Additional Comments From tausq at debian dot org  2004-06-07 18:26 -------
Created an attachment (id=6487)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6487&action=view)
testcase


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/3.5 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-06-07 18:52 -------
hmm, I see it fine on powerpc-apple-darwin on the mainline just fine.  I wonder if this is a target 
problem some how.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
  GCC build triplet|hppa-unknown-linux          |
   GCC host triplet|hppa-unknown-linux          |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/3.5 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gdr at gcc dot gnu dot org
   Target Milestone|---                         |3.4.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/3.5 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[steven at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |3.4.1 3.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/3.5 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2004-08-29 18:53 -------
Postponed until GCC 3.4.3.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|3.4.2                       |3.4.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/4.0 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[rth at gcc dot gnu dot org]

------- Additional Comments From rth at gcc dot gnu dot org  2004-10-13 18:54 -------
It would seem that this would affect any big-endian target for which the ABI
forces type promotion of parameters.  

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rth at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|                            |1
      Known to fail|3.4.1 4.0                   |3.4.1 4.0.0
   Last reconfirmed|0000-00-00 00:00:00         |2004-10-13 18:54:43
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/4.0 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[rth at gcc dot gnu dot org]

------- Additional Comments From rth at gcc dot gnu dot org  2004-10-13 18:57 -------
Someone will need to test this on an affected target, both with gcc and the
gdb testsuite.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/4.0 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[tausq at debian dot org]

------- Additional Comments From tausq at debian dot org  2004-10-13 21:24 -------
Verified with gcc-3.4.1 and gdb-6.2.1 on hppa-linux. Thanks Richard.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/4.0 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-10-13 23:44 -------
Subject: Bug 15860

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_4-branch
Changes by:	rth@gcc.gnu.org	2004-10-13 23:44:27

Modified files:
	gcc            : ChangeLog dwarf2out.c 

Log message:
	PR debug/15860
	* dwarf2out.c (rtl_for_decl_location): Apply big-endian correction
	for DECL_INCOMING_RTL.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=2.2326.2.657&r2=2.2326.2.658
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/dwarf2out.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.478.2.10&r2=1.478.2.11



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/4.0 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-10-13 23:44 -------
Subject: Bug 15860

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	rth@gcc.gnu.org	2004-10-13 23:43:57

Modified files:
	gcc            : ChangeLog dwarf2out.c 

Log message:
	PR debug/15860
	* dwarf2out.c (rtl_for_decl_location): Apply big-endian correction
	for DECL_INCOMING_RTL.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.5871&r2=2.5872
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/dwarf2out.c.diff?cvsroot=gcc&r1=1.554&r2=1.555



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/4.0 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[rth at gcc dot gnu dot org]

------- Additional Comments From rth at gcc dot gnu dot org  2004-10-13 23:45 -------
Fixed.

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860

[Bug debug/15860] [3.3/3.4/4.0 regression] No DW_AT_location debug info is emitted for formal arguments to a function that uses "register" qualifiers

[giovannibajo at libero dot it]

------- Additional Comments From giovannibajo at libero dot it  2004-10-14 01:45 -------
What about 3.3?

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15860