glsl: don't demote tess control shader outputs

[mesa.git] / src / glsl / loop_controls.cpp

diff --git a/src/glsl/loop_controls.cpp b/src/glsl/loop_controls.cpp
index 1c1d34fefe64d18488fffa2e6704e8188f62a3a8..51804bb5fe8563077fab5efe69326b0b9bca792d 100644 (file)
--- a/src/glsl/loop_controls.cpp
+++ b/src/glsl/loop_controls.cpp
@@ -102,9 +102,10 @@ calculate_iterations(ir_rvalue *from, ir_rvalue *to, ir_rvalue *increment,
       return -1;
 
    if (!iter->type->is_integer()) {
+      const ir_expression_operation op = iter->type->is_double()
+         ? ir_unop_d2i : ir_unop_f2i;
       ir_rvalue *cast =
-        new(mem_ctx) ir_expression(ir_unop_f2i, glsl_type::int_type, iter,
-                                   NULL);
+         new(mem_ctx) ir_expression(op, glsl_type::int_type, iter, NULL);
 
       iter = cast->constant_expression_value();
    }
@@ -122,7 +123,7 @@ calculate_iterations(ir_rvalue *from, ir_rvalue *to, ir_rvalue *increment,
    const int bias[] = { -1, 0, 1 };
    bool valid_loop = false;
 
-   for (unsigned i = 0; i < Elements(bias); i++) {
+   for (unsigned i = 0; i < ARRAY_SIZE(bias); i++) {
       /* Increment may be of type int, uint or float. */
       switch (increment->type->base_type) {
       case GLSL_TYPE_INT:
@@ -134,8 +135,11 @@ calculate_iterations(ir_rvalue *from, ir_rvalue *to, ir_rvalue *increment,
       case GLSL_TYPE_FLOAT:
          iter = new(mem_ctx) ir_constant(float(iter_value + bias[i]));
          break;
+      case GLSL_TYPE_DOUBLE:
+         iter = new(mem_ctx) ir_constant(double(iter_value + bias[i]));
+         break;
       default:
-          unreachable(!"Unsupported type for loop iterator.");
+          unreachable("Unsupported type for loop iterator.");
       }
 
       ir_expression *const mul =