[Bug debug/103619] New: armeb ICE since r12-5833

[clyon at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103619

            Bug ID: 103619
           Summary: armeb ICE since r12-5833
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: clyon at gcc dot gnu.org
  Target Milestone: ---

Since r12-5833, I've noticed an ICE on armeb which prevents building the
toolchain:

during RTL pass: dwarf2
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/libbacktrace/dwarf.c:
In function 'dwarf_lookup_pc':
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/libbacktrace/dwarf.c:3885:1:
internal compiler error: in dwf_cfa_reg, at dwarf2cfi.c:1139
 3885 | }
      | ^
make[3]: Entering directory
'/tmp/5562867_5.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-armeb-none-linux-gnueabihf/gcc3/armeb-none-linux-gnueabihf/libatomic'
0x8c97ca dwf_cfa_reg
       
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/dwarf2cfi.c:1139
0x8ca275 dwarf2out_frame_debug_expr
       
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/dwarf2cfi.c:2131
0x8c9c27 dwarf2out_frame_debug_expr
       
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/dwarf2cfi.c:1774
0x8cb21c dwarf2out_frame_debug
       
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/dwarf2cfi.c:2341
0x8cb21c scan_insn_after
       
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/dwarf2cfi.c:2700
0x8cd34c scan_trace
       
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/dwarf2cfi.c:2867
0x8cdfee create_cfi_notes
       
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/dwarf2cfi.c:2907
0x8cdfee execute_dwarf2_frame
       
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/dwarf2cfi.c:3285
0x8cdfee execute
       
/tmp/5562867_5.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/dwarf2cfi.c:3773

GCC is configured with --target=armeb-none-linux-gnueabihf --disable-nls --
disable-libgomp --disable-libmudflap --disable-libcilkrts --enable-checking
--enable-languages=c,c++,fortran --with-float=hard --enable-build-with-cxx
--with-mode=arm --with-cpu=cortex-a9 --with-fpu=neon-fp16

Little-endian arm targets (arm-*) are still OK.