[Bug rtl-optimization/67000] New: [6 Regression] ICE in split_complex_args, at function.c:2325 on ppc64le

["redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67000

            Bug ID: 67000
           Summary: [6 Regression] ICE in split_complex_args, at
                    function.c:2325 on ppc64le
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
                CC: aoliva at gcc dot gnu.org
  Target Milestone: ---
              Host: powerpc64le-unknown-linux-gnu
            Target: powerpc64le-unknown-linux-gnu
             Build: powerpc64le-unknown-linux-gnu

Starting with r226113 there's a new FAIL in the libstdc++ testsuite on ppc64le

In file included from
/home/jwakely/src/gcc/libstdc++-v3/testsuite/26_numerics/complex/value_operations/1.cc:23:0:
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/complex:
In function 'double std::__complex_abs(__complex__ double)':
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/complex:589:3:
internal compiler error: in split_complex_args, at function.c:2325
   __complex_abs(__complex__ double __z) { return __builtin_cabs(__z); }
   ^
0x1072f6ab split_complex_args
        /home/jwakely/src/gcc/gcc/function.c:2325
0x1072f6ab assign_parms_augmented_arg_list
        /home/jwakely/src/gcc/gcc/function.c:2397
0x1073239b assign_parms
        /home/jwakely/src/gcc/gcc/function.c:3676
0x10736357 expand_function_start(tree_node*)
        /home/jwakely/src/gcc/gcc/function.c:5192
0x1056f0c7 execute
        /home/jwakely/src/gcc/gcc/cfgexpand.c:6105
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with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

FAIL: 26_numerics/complex/value_operations/1.cc (test for excess errors)