[Bug target/54029] New: SH: Fix ICE in find_dead_or_set_registers

[Bug target/54029] New: SH: Fix ICE in find_dead_or_set_registers

[chrbr at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54029

             Bug #: 54029
           Summary: SH: Fix ICE in find_dead_or_set_registers
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: chrbr@gcc.gnu.org


Created attachment 27831
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27831
preprocessed file.  Compiles with -O2

This is a SH regression on the 4.7 and trunk while building Webkit
(pre-processed file size is about 2.2Mb 

A far branch to a return rtx produces an ICE in
find_dead_or_set_registers at line resource.c:497:

next = JUMP_LABEL (this_jump_insn);
if (ANY_RETURN_P (next)) <- next is null
 next = NULL_RTX;

Turns out that JUMP_LABEL was not set after gen_return in
sh.c:gen_far_branch.

Reproduce with a sh4-linux-g++ or sh-superh-elf-g++ 4.7.1 and above

[Bug target/54029] SH: ICE in find_dead_or_set_registers

[chrbr at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54029

--- Comment #1 from chrbr at gcc dot gnu.org 2012-07-19 11:56:14 UTC ---
Author: chrbr
Date: Thu Jul 19 11:56:09 2012
New Revision: 189652

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189652
Log:
PR target/54029
* config/sh/sh.c (gen_far_branch): Set JUMP_LABEL for return jumps.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/sh/sh.c

[Bug target/54029] SH: ICE in find_dead_or_set_registers

[chrbr at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54029

--- Comment #2 from chrbr at gcc dot gnu.org 2012-07-19 13:46:51 UTC ---
Author: chrbr
Date: Thu Jul 19 13:46:46 2012
New Revision: 189657

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189657
Log:
PR target/54029
* config/sh/sh.c (gen_far_branch): Set JUMP_LABEL for return jumps.


Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/config/sh/sh.c

[Bug target/54029] SH: ICE in find_dead_or_set_registers

[chrbr at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54029

chrbr at gcc dot gnu.org changed:

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

--- Comment #3 from chrbr at gcc dot gnu.org 2012-07-20 10:00:17 UTC ---
fixed in 4.7 and trunk