[Bug debug/18856] New: Missing .loc information after prologue

[Bug debug/18856] New: Missing .loc information after prologue

[tausq at debian dot org]

The attached program is extracted from the gdb testsuite (gdb.base/annota3.c)

According to Dan, the code generated by gcc is missing a .loc directive:
http://sources.redhat.com/ml/gdb-patches/2004-12/msg00143.html

i.e. gcc generates:

        .loc 1 6 0
handle_USR1:
        .PROC
        .CALLINFO FRAME=64,NO_CALLS,SAVE_SP,ENTRY_GR=3
        .ENTRY
        copy %r3,%r1
.LCFI0:
        copy %r30,%r3
.LCFI1:
        stwm %r1,64(%r30)
.LCFI2:
        stw %r26,-36(%r3)
        ldo 64(%r3),%r30
        ldwm -64(%r30),%r3
        bv,n %r0(%r2)
        .EXIT
        .PROCEND

but there should be another
        .loc 1 6 0
before the ldo insn.

gcc-3.4 handles this properly.

-- 
           Summary: Missing .loc information after prologue
           Product: gcc
           Version: 3.3.5
            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=18856

[Bug debug/18856] Missing .loc information after prologue

[tausq at debian dot org]

------- Additional Comments From tausq at debian dot org  2004-12-06 18:50 -------
Created an attachment (id=7692)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7692&action=view)
test case


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18856

[Bug debug/18856] Missing .loc information after prologue

[tausq at debian dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |3.4.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18856

[Bug debug/18856] [3.3 only] Missing .loc information after prologue

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-debug
            Summary|Missing .loc information    |[3.3 only] Missing .loc
                   |after prologue              |information after prologue
   Target Milestone|---                         |3.3.6


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18856

[Bug debug/18856] [3.3 only, regression] Missing .loc information after prologue

[tausq at debian dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|3.4.2                       |3.0.4 3.4.2
            Summary|[3.3 only] Missing .loc     |[3.3 only, regression]
                   |information after prologue  |Missing .loc information
                   |                            |after prologue


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18856

[Bug debug/18856] [3.3 regression] Missing .loc information after prologue

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[3.3 only, regression]      |[3.3 regression] Missing
                   |Missing .loc information    |.loc information after
                   |after prologue              |prologue


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18856

[Bug debug/18856] [3.3 regression] Missing .loc information after prologue

[danglin at gcc dot gnu dot org]

------- Additional Comments From danglin at gcc dot gnu dot org  2004-12-07 02:33 -------
The exact position of the end of the prologue is rather indeterminate as
scheduling blurs it.  In the example, the %r26 register save was originally
generated after the stack adjustment but scheduling has interchanged the stw
and ldo.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |danglin at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18856

[Bug debug/18856] [3.3 regression] Missing .loc information after prologue

[danglin at gcc dot gnu dot org]

------- Additional Comments From danglin at gcc dot gnu dot org  2004-12-07 03:04 -------
Sorry, forget that last comment.  the ldo is actually part of the epilogue.
The .loc should be after the stw.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18856

[Bug debug/18856] [3.3 regression] Missing .loc information after prologue

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2004-12-07 19:00:27
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18856

[Bug debug/18856] [3.3 regression] Missing .loc information after prologue

[gdr at gcc dot gnu dot org]

------- Additional Comments From gdr at gcc dot gnu dot org  2005-04-30 13:12 -------
work for 3.4.x, won't fix in 3.3.x

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18856