tests/sksl/fp/GrGrSLTypesAreSupported.fp

 int      test_i (int  a)       { for (;;) { return a; } }
 int2     test_i2(int2 a)       { for (;;) { return a; } }
 int3     test_i3(int3 a)       { for (;;) { return a; } }
 int4     test_i4(int4 a)       { for (;;) { return a; } }
 half3x4  test_h3x4(half3x4 a)  { for (;;) { return a; } }
 float2x4 test_f2x4(float2x4 a) { for (;;) { return a; } }

 half4 main() {
    return test_i(1).xxxx
           , test_i2(int2(1)).xxxx
           , test_i3(int3(1)).xxxx
           , test_i4(int4(1)).xxxx
           , test_h3x4(half3x4(1))[0]
           , test_f2x4(float2x4(1))[0]
           , half4(1);
}