[require]
GLSL >= 1.30
GL_ARB_uniform_buffer_object

[vertex shader]
#extension GL_ARB_uniform_buffer_object: require
#extension GL_ARB_shader_bit_encoding: enable
#extension GL_ARB_gpu_shader5: enable

struct S2 {
    mat2x3      m23;
    mat2x4      m24;
};

struct S1 {
    S2[1]       s2;
    int         i1;
};


layout(std140, row_major)
uniform UB1 {
                          // base   base  align  padded  row-   array   matrix
                          // align  off.  off.   size    major  stride  stride
    S1         s1;        //    16     0      0     128    -         -       -
//    S2[1]       s2            16     0      0     112    -       112       -
//      [0]
//      mat2x3      m23         16     0      0      48   yes        -      16
//      mat2x4      m24         16    48     48      64   yes        -      16
//    int      i1                4   112    112       4    -         -       -
} ;

flat out int vertex_pass;
in vec4 piglit_vertex;

#if defined(GL_ARB_shader_bit_encoding) || defined(GL_ARB_gpu_shader5) || __VERSION__ >= 430
bool float_match(float u, float f, uint bits) { return floatBitsToUint(u) == bits; }
#else
bool float_match(float u, float f, uint bits) { return u == f; }
#endif

void main()
{
    /* std140 (or shared) layout prevents any fields or blocks from being
     * eliminated.  Section 2.11.6 of the OpenGL ES 3.0 spec makes this
     * explicit, but desktop GL specs only imply it.
     */
    bool pass = true;

    if (s1.i1 != 111)
        pass = false;
	  
    vertex_pass = int(pass);
    gl_Position = piglit_vertex;
}

[fragment shader]
precision highp float;

out vec4 piglit_fragcolor;
flat in int vertex_pass;

void main()
{
    piglit_fragcolor = bool(vertex_pass) ? vec4(0, 1, 0, 1) : vec4(1, 0, 0, 1);
}

[test]
link success

active uniform s1.s2[0].m23 GL_UNIFORM_TYPE GL_FLOAT_MAT2x3
active uniform s1.s2[0].m23 GL_UNIFORM_SIZE 1
active uniform s1.s2[0].m23 GL_UNIFORM_OFFSET 0
active uniform s1.s2[0].m23 GL_UNIFORM_ARRAY_STRIDE 0
active uniform s1.s2[0].m23 GL_UNIFORM_MATRIX_STRIDE 16
active uniform s1.s2[0].m23 GL_UNIFORM_IS_ROW_MAJOR 1

active uniform s1.s2[0].m24 GL_UNIFORM_TYPE GL_FLOAT_MAT2x4
active uniform s1.s2[0].m24 GL_UNIFORM_SIZE 1
active uniform s1.s2[0].m24 GL_UNIFORM_OFFSET 48
active uniform s1.s2[0].m24 GL_UNIFORM_ARRAY_STRIDE 0
active uniform s1.s2[0].m24 GL_UNIFORM_MATRIX_STRIDE 16
active uniform s1.s2[0].m24 GL_UNIFORM_IS_ROW_MAJOR 1

active uniform s1.i1 GL_UNIFORM_TYPE GL_INT
active uniform s1.i1 GL_UNIFORM_SIZE 1
active uniform s1.i1 GL_UNIFORM_OFFSET 112
active uniform s1.i1 GL_UNIFORM_ARRAY_STRIDE 0
active uniform s1.i1 GL_UNIFORM_MATRIX_STRIDE 0
active uniform s1.i1 GL_UNIFORM_IS_ROW_MAJOR 0

uniform int s1.i1 111

draw rect -1 -1 2 2
probe all rgba 0.0 1.0 0.0 1.0