[Bug middle-end/48461] New: [4.7 Regression function.c:5268:1: error: emit_use_return_register_into_block defined but not used

[Bug middle-end/48461] New: [4.7 Regression function.c:5268:1: error: emit_use_return_register_into_block defined but not used

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48461

           Summary: [4.7 Regression function.c:5268:1: error:
                    emit_use_return_register_into_block defined but not
                    used
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: danglin@gcc.gnu.org
                CC: vries@gcc.gnu.org


/home/dave/opt/gnu/gcc/gcc-4.7.0/hppa-linux-gnu/sys-include    -c   -g -O2
-DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings -Werror -Wold-style-definition
-Wc++-compat -fno-common  -DHAVE_CONFIG_H -I. -I. -I../../gcc/gcc
-I../../gcc/gcc/. -I../../gcc/gcc/../include -I../../gcc/gcc/../libcpp/include 
-I../../gcc/gcc/../libdecnumber -I../../gcc/gcc/../libdecnumber/dpd
-I../libdecnumber    ../../gcc/gcc/function.c -o function.o
../../gcc/gcc/function.c:5268:1: error: âemit_use_return_register_into_blockâ
defined but not used [-Werror=unused-function]
cc1: all warnings being treated as errors

[Bug middle-end/48461] [4.7 Regression function.c:5268:1: error: emit_use_return_register_into_block defined but not used

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48461

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |build
             Target|                            |hppa-linux-gnu
   Target Milestone|---                         |4.7.0

[Bug middle-end/48461] [4.7 Regression function.c:5268:1: error: emit_use_return_register_into_block defined but not used

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48461

vries at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot       |vries at gcc dot gnu.org
                   |gnu.org                     |
   Target Milestone|4.7.0                       |---

[Bug middle-end/48461] [4.7 Regression] function.c:5268:1: error: emit_use_return_register_into_block defined but not used

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48461

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.0
            Summary|[4.7 Regression             |[4.7 Regression]
                   |function.c:5268:1: error:   |function.c:5268:1: error:
                   |emit_use_return_register_in |emit_use_return_register_in
                   |to_block defined but not    |to_block defined but not
                   |used                        |used

[Bug middle-end/48461] [4.7 Regression] function.c:5268:1: error: emit_use_return_register_into_block defined but not used

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48461

--- Comment #1 from vries at gcc dot gnu.org 2011-04-05 15:54:17 UTC ---
Author: vries
Date: Tue Apr  5 15:54:13 2011
New Revision: 171990

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=171990
Log:
2011-04-05  Tom de Vries  <tom@codesourcery.com>

    PR middle-end/48461
    * function.c (emit_use_return_register_into_block): Only define if
    HAVE_return.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/function.c

[Bug middle-end/48461] [4.7 Regression] function.c:5268:1: error: emit_use_return_register_into_block defined but not used

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48461

vries at gcc dot gnu.org changed:

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

--- Comment #2 from vries at gcc dot gnu.org 2011-04-05 16:01:17 UTC ---
The function emit_use_return_register_into_block is only used in code guarded
with HAVE_return, and therefore the definition of
emit_use_return_register_into_block should also be guarded with HAVE_return.

Failing to do this caused the error mentioned in the description field.

This is fixed by the check-in in comment 1.