[Bug target/61550] New: [4.10 Regression] [SH] build failure with ICE in gen_reg_rtx, at emit-rtl.c:943

[kkojima at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61550

            Bug ID: 61550
           Summary: [4.10 Regression] [SH] build failure with ICE in
                    gen_reg_rtx, at emit-rtl.c:943
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kkojima at gcc dot gnu.org
            Target: sh*-*-*

Created attachment 32966
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32966&action=edit
A reduced test case

The trunk fails to build on sh4-unknown-linux-gnu with an ICE
during compiling libgomp.  A reduced case attached fails with:

gomp.c: In function 'gomp_thread_start':
gomp.c:59:1: internal compiler error: in gen_reg_rtx, at emit-rtl.c:943
 }
 ^
0x8332ab1 gen_reg_rtx(machine_mode)
        ../../ORIG/trunk/gcc/emit-rtl.c:943
0x8343ad2 force_reg
        ../../ORIG/trunk/gcc/explow.c:659
0x890f5fe prepare_move_operands(rtx_def**, machine_mode)
        ../../ORIG/trunk/gcc/config/sh/sh.c:1832
0x896fb3d gen_movsi(rtx_def*, rtx_def*)
        ../../ORIG/trunk/gcc/config/sh/sh.md:6878
0x8367a60 insn_gen_fn::operator()(rtx_def*, rtx_def*) const
        ../../ORIG/trunk/gcc/recog.h:308
0x8367a60 emit_move_insn_1(rtx_def*, rtx_def*)
        ../../ORIG/trunk/gcc/expr.c:3521
0x8556a9c gen_move_insn(rtx_def*, rtx_def*)
        ../../ORIG/trunk/gcc/optabs.c:4874
0x85bc683 gen_reload
        ../../ORIG/trunk/gcc/reload1.c:8797