> From: David Malcolm <dmalc...@redhat.com>
> Date: Fri, 29 Aug 2014 13:26:59 +0200
> On Fri, 2014-08-29 at 06:13 +0200, Hans-Peter Nilsson wrote:
> > /tmp/hpautotest-gcc1/cris-elf/gccobj/./gcc/xgcc
> > -B/tmp/hpautotest-gcc1/cris-elf/gccobj/./gcc/ -nostdinc
> > -B/tmp/hpautotest-gcc1/cris-elf/gccobj/cris-elf/newlib/ -isystem
> > /tmp/hpautotest-gcc1/cris-elf/gccobj/cris-elf/newlib/targ-include -isystem
> > /tmp/hpautotest-gcc1/gcc/newlib/libc/include
> > -B/tmp/hpautotest-gcc1/cris-elf/gccobj/cris-elf/libgloss/cris
> > -L/tmp/hpautotest-gcc1/cris-elf/gccobj/cris-elf/libgloss/libnosys
> > -L/tmp/hpautotest-gcc1/gcc/libgloss/cris
> > -B/tmp/hpautotest-gcc1/cris-elf/pre/cris-elf/bin/
> > -B/tmp/hpautotest-gcc1/cris-elf/pre/cris-elf/lib/ -isystem
> > /tmp/hpautotest-gcc1/cris-elf/pre/cris-elf/include -isystem
> > /tmp/hpautotest-gcc1/cris-elf/pre/cris-elf/sys-include -g -O2 -march=v8
> > -mbest-lib-options -O2 -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W
> > -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
> > -Wold-style-definition -isystem ./include -g -DIN_LIBGCC2
> > -fbuilding-libgcc -fno-stack-protector -Dinhibit_libc -I. -I. -I../../../.
/!
> gcc
> > -I/tmp/
> > hpautotest-gcc1/gcc/libgcc -I/tmp/hpautotest-gcc1/gcc/libgcc/.
> > -I/tmp/hpautotest-gcc1/gcc/libgcc/../gcc
> > -I/tmp/hpautotest-gcc1/gcc/libgcc/../include -DHAVE_CC_TLS -DUSE_EMUTLS -o
> > _lshrdi3.o -MT _lshrdi3.o -MD -MP -MF _lshrdi3.dep -DL_lshrdi3 -c
> > /tmp/hpautotest-gcc1/gcc/libgcc/libgcc2.c -fvisibility=hidden -DHIDE_EXPORTS
> > /tmp/hpautotest-gcc1/gcc/libgcc/libgcc2.c: In function '__lshrdi3':
> > /tmp/hpautotest-gcc1/gcc/libgcc/libgcc2.c:426:1: internal compiler error:
> > in safe_as_a, at is-a.h:205
> > }
> > ^
> > 0x9119c2 safe_as_a<rtx_insn*, rtx_def>
> > /tmp/hpautotest-gcc1/gcc/gcc/is-a.h:205
> > 0x9119c2 JUMP_LABEL_AS_INSN
> > /tmp/hpautotest-gcc1/gcc/gcc/rtl.h:1663
> > 0x9119c2 find_dead_or_set_registers
> > /tmp/hpautotest-gcc1/gcc/gcc/resource.c:500
> > 0x912408 mark_target_live_regs(rtx_insn*, rtx_insn*, resources*)
> > /tmp/hpautotest-gcc1/gcc/gcc/resource.c:1115
> > 0x90cb4b fill_slots_from_thread
> > /tmp/hpautotest-gcc1/gcc/gcc/reorg.c:2404
> > 0x90ff45 fill_eager_delay_slots
> > /tmp/hpautotest-gcc1/gcc/gcc/reorg.c:2933
> > 0x90ff45 dbr_schedule
> > /tmp/hpautotest-gcc1/gcc/gcc/reorg.c:3742
> > 0x9108ef rest_of_handle_delay_slots
> > /tmp/hpautotest-gcc1/gcc/gcc/reorg.c:3885
> > 0x9108ef execute
> > /tmp/hpautotest-gcc1/gcc/gcc/reorg.c:3916
> > Please submit a full bug report,
> > with preprocessed source if appropriate.
> > Please include the complete backtrace with any bug report.
> > See <http://gcc.gnu.org/bugs.html> for instructions.
> > make[4]: *** [_lshrdi3.o] Error 1
> >
> > Use "./cc1 -fpreprocessed this.i -O2" to repeat.
> Sorry about this.
>
> Looks like I introduced this bug in r214693 (aka patch #225).
>
> The issue is within resource.c:
> 499 {
> 500 next = JUMP_LABEL_AS_INSN (this_jump_insn);
> 501 if (ANY_RETURN_P (next))
> 502 next = NULL;
>
> where "next" is an rtx_insn *, but the JUMP_LABEL of this_jump_insn is a
> RETURN, rather than an insn (several such issues in that commit).
>
> Patch attached, which fixes the above testcase; bootstrap in progress:
>
> gcc/
> * resource.h (mark_target_live_regs): Undo erroneous conversion
> of second param of r214693, converting it back from rtx_insn * to
> rtx, since it could be a RETURN.
>
> * resource.c (find_dead_or_set_registers): Similarly, convert
> param "jump_target" back from an rtx_insn ** to an rtx *, as we
> could be writing back a RETURN. Rename local rtx_insn * "next" to
> "next_insn", and introduce "lab_or_return" as a local rtx,
> handling the case where JUMP_LABEL (this_jump_insn) is a RETURN.
> (mark_target_live_regs): Undo erroneous conversion
> of second param of r214693, converting it back from rtx_insn * to
> rtx, since it could be a RETURN. Rename it from "target" to
> "target_maybe_return", reintroducing the name "target" as a local
> rtx_insn * with a checked cast, after we've handled the case of
> ANY_RETURN_P.
Sorry, but that didn't help. I still get the exact same error.
(Yep, I double-checked that I didn't goof testing...)
brgds, H-P
