src/glsl/TODO

   1 - Detect code paths in non-void functions that don't reach a return statement
   2
   3 - Improve handling of constants and their initializers.  Constant initializers
   4   should never generate any code.  This is trival for scalar constants.  It is
   5   also trivial for arrays, matrices, and vectors that are accessed with
   6   constant index values.  For others it is more complicated.  Perhaps these
   7   cases should be silently converted to uniforms?
   8
   9 - Implement support for ir_binop_dot in ir_algebraic.cpp.  Perform
  10   transformations such as "dot(v, vec3(0.0, 1.0, 0.0))" -> v.y.
  11
  12 1.30 features:
  13
  14 - Implement AST-to-HIR conversion of bit-shift operators.
  15
  16 - Implement AST-to-HIR conversion of bit-wise {&,|,^,!} operators.
  17
  18 - Implement AST-to-HIR conversion of switch-statements
  19   - switch
  20   - case
  21   - Update break to correcly handle mixed nexting of switch-statements
  22     and loops.
  23
  24 - Handle currently unsupported constant expression types
  25   - ir_unop_bit_not
  26   - ir_binop_mod
  27   - ir_binop_lshift
  28   - ir_binop_rshift
  29   - ir_binop_bit_and
  30   - ir_binop_bit_xor
  31   - ir_binop_bit_or
  32
  33 - Implement support for 1.30 style shadow compares which only return a float
  34   instead of a vec4.
  35
  36 - Implement support for gl_ClipDistance.  This is non-trivial because
  37   gl_ClipDistance is exposed as a float[8], but all hardware actually
  38   implements it as vec4[2].