[Bug target/71648] New: C++ ICE on ppc64 with -m64

[markos at freevec dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71648

            Bug ID: 71648
           Summary: C++ ICE on ppc64 with -m64
           Product: gcc
           Version: 6.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: markos at freevec dot org
                CC: wschmidt at gcc dot gnu.org
  Target Milestone: ---
              Host: powerpc-linux-gnu
            Target: powerpc-linux-gnu
             Build: powerpc-linux-gnu

$ g++-6 -m64 -O2 -c testcase2.cpp 
testcase2.cpp: In function ‘void x33()’:
testcase2.cpp:55:1: error: insn does not satisfy its constraints:
 }
 ^
(insn 40 39 41 2 (set (reg:DI 63 31 [orig:157 _6 ] [157])
        (reg:DI 9 9)) testcase2.cpp:44 549 {*movdi_internal64}
     (nil))
testcase2.cpp:55:1: internal compiler error: in extract_constrain_insn, at
recog.c:2190
0x107077ff _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        ../../src/gcc/rtl-error.c:108
0x10707833 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        ../../src/gcc/rtl-error.c:119
0x106d5be7 extract_constrain_insn(rtx_insn*)
        ../../src/gcc/recog.c:2190
0x106da11f copyprop_hardreg_forward_1
        ../../src/gcc/regcprop.c:774
0x106db59f copyprop_hardreg_forward_bb_without_debug_insn(basic_block_def*)
        ../../src/gcc/regcprop.c:1152
0x107493bf prepare_shrink_wrap
        ../../src/gcc/shrink-wrap.c:440
0x107493bf try_shrink_wrapping(edge_def**, bitmap_head*, rtx_insn*)
        ../../src/gcc/shrink-wrap.c:646
0x104f0c7b thread_prologue_and_epilogue_insns()
        ../../src/gcc/function.c:6066
0x104f1757 rest_of_handle_thread_prologue_and_epilogue
        ../../src/gcc/function.c:6588
0x104f1757 execute
        ../../src/gcc/function.c:6630
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Please include the complete backtrace with any bug report.
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