[require]
GLSL >= 1.50

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

// To reproduce the Mesa bug, S1 must be larger than 16 bytes and not
// 16-byte aligned.  In addition, the uniform block must have an instance
// name.

struct S1 {
    bvec2       bv1;
    float       f1;
    uvec2       uv1;
};

struct S2 {
    mat4x2      m42_1;
};

struct S3 {
    S2          s2_1;
};

layout(std140)
uniform UB {
                          // base   base  align  padded  row-   array   matrix
                          // align  off.  off.   size    major  stride  stride
    S1[2]      s1_1;      //    16     0      0      64    -        32       -
//    [0]
//    bvec2       bv1            8     0      0       8    -         -       -
//    float       f1             4     8      8       4    -         -       -
//    uvec2       uv1            8    12     16       8    -         -       -
//    [1]
//    bvec2       bv1            8    32     32       8    -         -       -
//    float       f1             4    40     40       4    -         -       -
//    uvec2       uv1            8    44     48       8    -         -       -
    S3[1]      s3_1;      //    16    64     64      64    -        64       -
//    [0]
//    S2          s2_1          16    64     64      64    -         -       -
//      mat4x2      m42_1       16    64     64      64   no         -      16
} ub;

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()
{
    bool pass;

    pass = float_match(ub.s3_1[0].s2_1.m42_1[0].y, 32703.5333028, 0x46ff7f11u);

    vertex_pass = int(pass);
    gl_Position = piglit_vertex;
}

[fragment shader]
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 UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_TYPE GL_FLOAT_MAT4x2
active uniform UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_SIZE 1
active uniform UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_OFFSET 64
active uniform UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_ARRAY_STRIDE 0
active uniform UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_MATRIX_STRIDE 16
active uniform UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_IS_ROW_MAJOR 0

uniform mat4x2 UB.s3_1[0].s2_1.m42_1 0x4680c6b6 0x46ff7f11 0x462085c4 0x46cefb3e 0xc6b24e67 0x469e776a 0xc6e2d23a 0xc64833be

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