r300/compiler: Don't create register classes for inputs

diff --git a/src/gallium/drivers/r300/compiler/radeon_pair_regalloc.c b/src/gallium/drivers/r300/compiler/radeon_pair_regalloc.c
index 85bb248b1275e90d483f260cda29ced723d4a631..12594c8196607f3e28e2093e62a5c0354813203c 100644 (file)
--- a/src/gallium/drivers/r300/compiler/radeon_pair_regalloc.c
+++ b/src/gallium/drivers/r300/compiler/radeon_pair_regalloc.c
@@ -539,7 +539,6 @@ static void do_advanced_regalloc(struct regalloc_state * s)
 
        unsigned int i, j, index, input_node, node_count, node_index;
        unsigned int * node_classes;
-       unsigned int * input_classes;
        struct rc_instruction * inst;
        struct rc_list * var_ptr;
        struct rc_list * variables;
@@ -554,8 +553,6 @@ static void do_advanced_regalloc(struct regalloc_state * s)
        node_count = rc_list_count(variables);
        node_classes = memory_pool_malloc(&s->C->Pool,
                        node_count * sizeof(unsigned int));
-       input_classes = memory_pool_malloc(&s->C->Pool,
-                       s->NumInputs * sizeof(unsigned int));
 
        for (var_ptr = variables, node_index = 0; var_ptr;
                                        var_ptr = var_ptr->Next, node_index++) {
@@ -610,7 +607,7 @@ static void do_advanced_regalloc(struct regalloc_state * s)
                rc_for_all_reads_mask(inst, scan_read_callback, s);
        }
 
-       /* Create classes for input registers */
+       /* Compute the writemask for inputs. */
        for (i = 0; i < s->NumInputs; i++) {
                unsigned int chan, class_id, writemask = 0;
                for (chan = 0; chan < 4; chan++) {
@@ -619,14 +616,6 @@ static void do_advanced_regalloc(struct regalloc_state * s)
                        }
                }
                s->Input[i].Writemask = writemask;
-               if (!writemask) {
-                       continue;
-               }
-
-               class_id = ra_alloc_reg_class(regs);
-               input_classes[i] = class_id;
-               ra_class_add_reg(regs, class_id,
-                               get_reg_id(s->Input[i].Index, writemask));
        }
 
        ra_set_finalize(regs, NULL);
@@ -663,8 +652,6 @@ static void do_advanced_regalloc(struct regalloc_state * s)
                if (!s->Input[i].Writemask) {
                        continue;
                }
-               ra_set_node_class(graph, node_count + input_node,
-                                                       input_classes[i]);
                for (var_ptr = variables, node_index = 0;
                                var_ptr; var_ptr = var_ptr->Next, node_index++) {
                        struct rc_variable * var = var_ptr->Item;