[Bug c++/45984] New: [4.6 Regression] ICE: canonical types differ for identical types

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45984

           Summary: [4.6 Regression] ICE: canonical types differ for
                    identical types
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: rgue...@gcc.gnu.org


> ./cc1plus -quiet -std=c++0x synth.3.ii 
synth.3.ii: In member function 'void freeverb_stereo_t::process(const
chunk_array_stereo_t&, chunk_array_stereo_t&)':
synth.3.ii:31:23: internal compiler error: canonical types differ for identical
types const chunk_array_stereo_t and const chunk_array_t<2ul>
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

typedef __SIZE_TYPE__ size_t;
enum { chunk_size = 16 };
typedef float __m128 __attribute__ ((__vector_size__ (16), __may_alias__));
typedef float __v4sf __attribute__ ((__vector_size__ (16)));
struct __attribute__((aligned((16)))) float4_t {
    typedef float scalar_t;
    typedef __m128 type_t;
    typedef float4_t return_type_t;
    type_t m;
    inline __attribute__((artificial, gnu_inline, always_inline)) explicit
    float4_t(scalar_t a) : m(((__m128) (__v4sf) { (a), (a), (a), (a) })) { }
    inline __attribute__((artificial, gnu_inline, always_inline, pure)) friend
    return_type_t operator+(float4_t lhs, float4_t rhs) { }
};
template<size_t NumChans>  class __attribute__((aligned((16)))) chunk_array_t {
public:
    typedef float4_t value_type_t;
    typedef value_type_t value_array_t[chunk_size/4];
    enum { num_scalars = chunk_size,    num_values = num_scalars/4  };
    const value_array_t &chan(size_t c) const { }
    value_type_t operator[](size_t i) const { }
};
typedef chunk_array_t<1> chunk_array_mono_t;
typedef chunk_array_t<2> chunk_array_stereo_t;
class freeverb_stereo_t {
    void process(const chunk_array_stereo_t & __restrict__ src,
                 chunk_array_stereo_t & __restrict__ dst) {
        enum { chunk_size = chunk_array_t<1>::num_values };
        chunk_array_mono_t mix;
        for (size_t i=0; i<chunk_size; ++i)
          mix[i] = src.chan(0)[i] + src.chan(1)[i];
    }
};