glsl: Add a pass to lower bitfield-insert into bfm+bfi.

i965/Gen7+ and Radeon/Evergreen+ have bfm/bfi instructions to implement
bitfieldInsert() from ARB_gpu_shader5.

v2: Add ir_binop_bfm and ir_triop_bfi to st_glsl_to_tgsi.cpp.
    Remove spurious temporary assignment and dereference.

Reviewed-by: Chris Forbes <[email protected]>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index c6f6bf42ea0..084846201c9 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -1489,6 +1489,8 @@ ir_to_mesa_visitor::visit(ir_expression *ir)
       emit(ir, OPCODE_LRP, result_dst, op[2], op[1], op[0]);
       break;
 
+   case ir_binop_bfm:
+   case ir_triop_bfi:
    case ir_triop_bitfield_extract:
    case ir_quadop_bitfield_insert:
       assert(!"not supported");