[Bug regression/51051] New: [4.7 Regression]: build fails on cris-elf building libstdc++-v3

[hp at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51051

             Bug #: 51051
           Summary: [4.7 Regression]: build fails on cris-elf building
                    libstdc++-v3
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: build, ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: regression
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hp@gcc.gnu.org
                CC: amodra@gcc.gnu.org
              Host: x86_64-unknown-linux-gnu
            Target: cris-axis-elf


Created attachment 25763
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25763
cc1plus -fpreprocessed new_opv.ii -melf -g -O2 -fno-implicit-templates
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=new_opv.lo -o new_opv.s

A patch in the revision range (last_known_working:first_known_failing)
181187:181189 caused the build for cris-elf to fail as follows:
libtool: compile:  /tmp/hpautotest-gcc1/cris-elf/gccobj/./gcc/xgcc
-shared-libgcc -B/tmp/hpautotest-gcc1/cris-elf/gccobj/./gcc -nostdinc++
-L/tmp/hpautotest-gcc1/cris-elf/gccobj/cris-elf/libstdc++-v3/src
-L/tmp/hpautotest-gcc1/cris-elf/gccobj/cris-elf/libstdc++-v3/src/.libs
-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
-I/tmp/hpautotest-gcc1/gcc/libstdc++-v3/../libgcc
-I/tmp/hpautotest-gcc1/cris-elf/gccobj/cris-elf/libstdc++-v3/include/cris-elf
-I/tmp/hpautotest-gcc1/cris-elf/gccobj/cris-elf/libstdc++-v3/include
-I/tmp/hpautotest-gcc1/gcc/libstdc++-v3/libsupc++ -fno-implicit-templates -Wall
-Wextra -Wwrite-strings -Wcast-qual -fdiagnostics-show-location=once
-ffunction-sections -fdata-sections -frandom-seed=new_opv.lo -g -O2 -c
/tmp/hpautotest-gcc1/gcc/libstdc++-v3/libsupc++/new_opv.cc -o new_opv.o
/tmp/hpautotest-gcc1/gcc/libstdc++-v3/libsupc++/new_opv.cc: In function 'void*
operator new [](std::size_t)':
/tmp/hpautotest-gcc1/gcc/libstdc++-v3/libsupc++/new_opv.cc:34:1: error: missing
REG_EH_REGION note in the end of bb 2
/tmp/hpautotest-gcc1/gcc/libstdc++-v3/libsupc++/new_opv.cc:34:1: error: call
edges for non-call insn in bb 2
/tmp/hpautotest-gcc1/gcc/libstdc++-v3/libsupc++/new_opv.cc:34:1: error: in
basic block 2:
/tmp/hpautotest-gcc1/gcc/libstdc++-v3/libsupc++/new_opv.cc:34:1: error: flow
control insn inside a basic block
(call_insn 8 6 50 2 (parallel [
            (set (reg:SI 10 r10)
                (call (mem:QI (symbol_ref:SI ("_Znwm") [flags 0x41]
<function_decl 0x7f94a90bf300 operator new>) [0 operator new S1 A8])
                    (const_int 0 [0])))
            (clobber (reg:SI 16 srp))
        ]) /tmp/hpautotest-gcc1/gcc/libstdc++-v3/libsupc++/new_opv.cc:33 222
{*expanded_call_value_non_v32}
     (expr_list:REG_EH_REGION (const_int 1 [0x1])
        (nil))
    (expr_list:REG_UNUSED (use (reg:SI 10 r10))
        (nil)))
/tmp/hpautotest-gcc1/gcc/libstdc++-v3/libsupc++/new_opv.cc:34:1: internal
compiler error: in rtl_verify_flow_info_1, at cfgrtl.c:2001



Author of suspect patch in revision range CC:ed and preprocessed source
attached.