glsl/opt_algebraic: Drop the ftrunc pattern recognizer.

Now that it's in NIR, there's no change to r300 or freedreno shader-db when we do. Acked-by: Timothy Arceri <[email protected]> Reviewed-by: Marek Olšák <[email protected]> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21475>
intrnl · Feb 28, 2023 · 579aca8 · 579aca8
1 parent 6d52e6f
commit 579aca8
Showing 1 changed file with 0 additions and 36 deletions.
diff --git a/src/compiler/glsl/opt_algebraic.cpp b/src/compiler/glsl/opt_algebraic.cpp
@@ -347,42 +347,6 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
 	 reassociate_constant(ir, 0, op_const[0], op_expr[1]);
       if (op_const[1] && !op_const[0])
 	 reassociate_constant(ir, 1, op_const[1], op_expr[0]);
-
-      /* Optimizes
-       *
-       *    (mul (floor (add (abs x) 0.5) (sign x)))
-       *
-       * into
-       *
-       *    (trunc (add x (mul (sign x) 0.5)))
-       */
-      for (int i = 0; i < 2; i++) {
-         ir_expression *sign_expr = ir->operands[i]->as_expression();
-         ir_expression *floor_expr = ir->operands[1 - i]->as_expression();
-
-         if (!sign_expr || sign_expr->operation != ir_unop_sign ||
-             !floor_expr || floor_expr->operation != ir_unop_floor)
-            continue;
-
-         ir_expression *add_expr = floor_expr->operands[0]->as_expression();
-         if (!add_expr || add_expr->operation != ir_binop_add)
-            continue;
-
-         for (int j = 0; j < 2; j++) {
-            ir_expression *abs_expr = add_expr->operands[j]->as_expression();
-            if (!abs_expr || abs_expr->operation != ir_unop_abs)
-               continue;
-
-            ir_constant *point_five = add_expr->operands[1 - j]->as_constant();
-            if (!point_five || !point_five->is_value(0.5, 0))
-               continue;
-
-            if (abs_expr->operands[0]->equals(sign_expr->operands[0])) {
-               return trunc(add(abs_expr->operands[0],
-                                mul(sign_expr, point_five)));
-            }
-         }
-      }
       break;
 
    case ir_binop_min: