glsl: Implement ast-to-hir for bit-shift-assignment

Implement by adding to ast_expression::hir() these cases:
    - ast_ls_assign
    - ast_rs_assign

diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index 5201579..59401e7 100644 (file)
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -1146,11 +1146,19 @@ ast_expression::hir(exec_list *instructions,
    }
 
    case ast_ls_assign:
-   case ast_rs_assign:
-      _mesa_glsl_error(& loc, state,
-                      "FINISHME: implement bit-shift assignment operators");
-      error_emitted = true;
+   case ast_rs_assign: {
+      op[0] = this->subexpressions[0]->hir(instructions, state);
+      op[1] = this->subexpressions[1]->hir(instructions, state);
+      type = shift_result_type(op[0]->type, op[1]->type, this->oper, state,
+                               &loc);
+      ir_rvalue *temp_rhs = new(ctx) ir_expression(operations[this->oper],
+                                                   type, op[0], op[1]);
+      result = do_assignment(instructions, state, op[0]->clone(ctx, NULL),
+                             temp_rhs,
+                             this->subexpressions[0]->get_location());
+      error_emitted = op[0]->type->is_error() || op[1]->type->is_error();
       break;
+   }
 
    case ast_and_assign:
    case ast_xor_assign: