Warning, version 400 is not yet complete; some version-specific features are present, but many are missing.
ERROR: 0:20: 'texture gather component' : must be a constant 
ERROR: 0:21: 'texture gather component' : must be 0, 1, 2, or 3 
ERROR: 0:28: 'location qualifier on input' : not supported for this version or the enabled extensions 
ERROR: 0:36: 'location qualifier on uniform or buffer' : not supported for this version or the enabled extensions 
ERROR: 0:38: 'redeclaration' : cannot apply layout qualifier to gl_Color
ERROR: 0:39: 'redeclaration' : cannot change qualification of gl_ClipDistance
ERROR: 0:41: 'gl_FragCoord' : cannot redeclare after use 
ERROR: 7 compilation errors.  No code generated.

gl_FragCoord pixel center is integer
gl_FragCoord origin is upper left
ERROR: node is still EOpNull!
0:10  Function Definition: main( (void)
0:10    Function Parameters: 
0:?     Sequence
0:13      move second child to first child (4-component vector of float)
0:13        'v' (4-component vector of float)
0:13        Function Call: texture(s21;vf2; (4-component vector of float)
0:13          indirect index (sampler2D)
0:13            'arrayedSampler' (uniform 5-element array of sampler2D)
0:13            'i' (flat in int)
0:13          'c2D' (smooth in 2-component vector of float)
0:14      move second child to first child (float)
0:14        direct index (float)
0:14          'outp' (out 4-component vector of float)
0:14          Constant:
0:14            0 (const int)
0:14        direct index (smooth float)
0:14          'gl_ClipDistance' (smooth in unsized array of float)
0:14          Constant:
0:14            1 (const int)
0:17      Sequence
0:17        move second child to first child (4-component vector of uint)
0:17          'uv4' (4-component vector of uint)
0:17          Function Call: textureGatherOffsets(usR21;vf2;vi2[4];i1; (4-component vector of uint)
0:17            'samp2dr' (uniform usampler2DRect)
0:17            'c2D' (smooth in 2-component vector of float)
0:17            'offsets' (4-element array of 2-component vector of int)
0:17            Constant:
0:17              2 (const int)
0:18      Sequence
0:18        move second child to first child (4-component vector of float)
0:18          'v4' (4-component vector of float)
0:18          Function Call: textureGather(s21;vf2; (4-component vector of float)
0:18            direct index (sampler2D)
0:18              'arrayedSampler' (uniform 5-element array of sampler2D)
0:18              Constant:
0:18                0 (const int)
0:18            'c2D' (smooth in 2-component vector of float)
0:19      Sequence
0:19        move second child to first child (4-component vector of int)
0:19          'iv4' (4-component vector of int)
0:19          Function Call: textureGatherOffset(isA21;vf3;vi2;i1; (4-component vector of int)
0:19            'isamp2DA' (uniform isampler2DArray)
0:19            Constant:
0:19              0.100000
0:19              0.100000
0:19              0.100000
0:19            Constant:
0:19              1 (const int)
0:19              1 (const int)
0:19            Constant:
0:19              3 (const int)
0:20      move second child to first child (4-component vector of int)
0:20        'iv4' (4-component vector of int)
0:20        Function Call: textureGatherOffset(isA21;vf3;vi2;i1; (4-component vector of int)
0:20          'isamp2DA' (uniform isampler2DArray)
0:20          Constant:
0:20            0.100000
0:20            0.100000
0:20            0.100000
0:20          Constant:
0:20            1 (const int)
0:20            1 (const int)
0:20          'i' (flat in int)
0:21      move second child to first child (4-component vector of int)
0:21        'iv4' (4-component vector of int)
0:21        Function Call: textureGatherOffset(isA21;vf3;vi2;i1; (4-component vector of int)
0:21          'isamp2DA' (uniform isampler2DArray)
0:21          Constant:
0:21            0.100000
0:21            0.100000
0:21            0.100000
0:21          Constant:
0:21            1 (const int)
0:21            1 (const int)
0:21          Constant:
0:21            4 (const int)
0:22      move second child to first child (4-component vector of int)
0:22        'iv4' (4-component vector of int)
0:22        Function Call: textureGatherOffset(isA21;vf3;vi2;i1; (4-component vector of int)
0:22          'isamp2DA' (uniform isampler2DArray)
0:22          Constant:
0:22            0.100000
0:22            0.100000
0:22            0.100000
0:22          Constant:
0:22            1 (const int)
0:22            1 (const int)
0:22          Constant:
0:22            3 (const int)
0:23      move second child to first child (4-component vector of int)
0:23        'iv4' (4-component vector of int)
0:23        Function Call: textureGatherOffset(isA21;vf3;vi2; (4-component vector of int)
0:23          'isamp2DA' (uniform isampler2DArray)
0:23          Constant:
0:23            0.100000
0:23            0.100000
0:23            0.100000
0:23          Construct ivec2 (2-component vector of int)
0:23            'i' (flat in int)
0:25      Sequence
0:25        move second child to first child (4-component vector of float)
0:25          'c' (4-component vector of float)
0:25          'gl_FragCoord' (gl_FragCoord 4-component vector of float)
0:?   Linker Objects
0:?     'c2D' (smooth in 2-component vector of float)
0:?     'i' (flat in int)
0:?     'outp' (out 4-component vector of float)
0:?     'arrayedSampler' (uniform 5-element array of sampler2D)
0:?     'samp2dr' (uniform usampler2DRect)
0:?     'isamp2DA' (uniform isampler2DArray)
0:?     'gl_ClipDistance' (smooth in 4-element array of float)
0:?     'vl' (layout(location=4 ) smooth in 4-component vector of float)
0:?     'vl2' (layout(location=4 ) smooth in 4-component vector of float)
0:?     'uv3' (layout(location=3 ) uniform 3-component vector of float)
0:?     '__anon__0' (in block{gl_FogFragCoord,gl_TexCoord,gl_Color,gl_SecondaryColor})
0:?     '__anon__0' (in block{gl_FogFragCoord,gl_TexCoord,gl_Color,gl_SecondaryColor})
0:?     'gl_FragCoord' (gl_FragCoord 4-component vector of float)
0:?     'gl_FragCoord' (gl_FragCoord 4-component vector of float)