i965/fs: Rename virtual_grf_next to virtual_grf_count.

"count" is a more useful name, since most of the time we're using it for
looping over the variables.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/mesa/drivers/dri/i965/brw_fs.cpp

@@ -416,7 +416,7 @@ fs_visitor::implied_mrf_writes(fs_inst *inst)
 int
 fs_visitor::virtual_grf_alloc(int size)
 {
-   if (virtual_grf_array_size <= virtual_grf_next) {
+   if (virtual_grf_array_size <= virtual_grf_count) {
       if (virtual_grf_array_size == 0)
 	 virtual_grf_array_size = 16;
       else
@@ -424,8 +424,8 @@ fs_visitor::virtual_grf_alloc(int size)
       virtual_grf_sizes = reralloc(mem_ctx, virtual_grf_sizes, int,
 				   virtual_grf_array_size);
    }
-   virtual_grf_sizes[virtual_grf_next] = size;
-   return virtual_grf_next++;
+   virtual_grf_sizes[virtual_grf_count] = size;
+   return virtual_grf_count++;
 }
 
 /** Fixed HW reg constructor. */
@@ -1037,7 +1037,7 @@ fs_visitor::assign_urb_setup()
 void
 fs_visitor::split_virtual_grfs()
 {
-   int num_vars = this->virtual_grf_next;
+   int num_vars = this->virtual_grf_count;
    bool split_grf[num_vars];
    int new_virtual_grf[num_vars];
 
@@ -2031,7 +2031,6 @@ fs_visitor::run()
 
       if (0) {
 	 /* Debug of register spilling: Go spill everything. */
-	 int virtual_grf_count = virtual_grf_next;
 	 for (int i = 0; i < virtual_grf_count; i++) {
 	    spill_reg(i);
 	 }

src/mesa/drivers/dri/i965/brw_fs.h

@@ -351,7 +351,7 @@ public:
    int param_offset[MAX_UNIFORMS * 4];
 
    int *virtual_grf_sizes;
-   int virtual_grf_next;
+   int virtual_grf_count;
    int virtual_grf_array_size;
    int *virtual_grf_def;
    int *virtual_grf_use;

src/mesa/drivers/dri/i965/brw_fs_live_variables.cpp

@@ -137,7 +137,7 @@ fs_live_variables::fs_live_variables(fs_visitor *v, fs_cfg *cfg)
 {
    mem_ctx = ralloc_context(cfg->mem_ctx);
 
-   num_vars = v->virtual_grf_next;
+   num_vars = v->virtual_grf_count;
    bd = rzalloc_array(mem_ctx, struct block_data, cfg->num_blocks);
    vars = rzalloc_array(mem_ctx, struct var, num_vars);
 
@@ -162,7 +162,7 @@ fs_live_variables::~fs_live_variables()
 void
 fs_visitor::calculate_live_intervals()
 {
-   int num_vars = this->virtual_grf_next;
+   int num_vars = this->virtual_grf_count;
 
    if (this->live_intervals_valid)
       return;

src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp

@@ -43,17 +43,17 @@ assign_reg(int *reg_hw_locations, fs_reg *reg, int reg_width)
 void
 fs_visitor::assign_regs_trivial()
 {
-   int hw_reg_mapping[this->virtual_grf_next + 1];
+   int hw_reg_mapping[this->virtual_grf_count + 1];
    int i;
    int reg_width = c->dispatch_width / 8;
 
    /* Note that compressed instructions require alignment to 2 registers. */
    hw_reg_mapping[0] = ALIGN(this->first_non_payload_grf, reg_width);
-   for (i = 1; i <= this->virtual_grf_next; i++) {
+   for (i = 1; i <= this->virtual_grf_count; i++) {
       hw_reg_mapping[i] = (hw_reg_mapping[i - 1] +
 			   this->virtual_grf_sizes[i - 1] * reg_width);
    }
-   this->grf_used = hw_reg_mapping[this->virtual_grf_next];
+   this->grf_used = hw_reg_mapping[this->virtual_grf_count];
 
    foreach_list(node, &this->instructions) {
       fs_inst *inst = (fs_inst *)node;
@@ -155,7 +155,7 @@ fs_visitor::assign_regs()
     * for reg_width == 2.
     */
    int reg_width = c->dispatch_width / 8;
-   int hw_reg_mapping[this->virtual_grf_next];
+   int hw_reg_mapping[this->virtual_grf_count];
    int first_assigned_grf = ALIGN(this->first_non_payload_grf, reg_width);
    int base_reg_count = (max_grf - first_assigned_grf) / reg_width;
    int class_sizes[base_reg_count];
@@ -178,7 +178,7 @@ fs_visitor::assign_regs()
        */
       class_sizes[class_count++] = 2;
    }
-   for (int r = 0; r < this->virtual_grf_next; r++) {
+   for (int r = 0; r < this->virtual_grf_count; r++) {
       int i;
 
       for (i = 0; i < class_count; i++) {
@@ -198,9 +198,9 @@ fs_visitor::assign_regs()
 				 reg_width, base_reg_count);
 
    struct ra_graph *g = ra_alloc_interference_graph(brw->wm.regs,
-						    this->virtual_grf_next);
+						    this->virtual_grf_count);
 
-   for (int i = 0; i < this->virtual_grf_next; i++) {
+   for (int i = 0; i < this->virtual_grf_count; i++) {
       for (int c = 0; c < class_count; c++) {
 	 if (class_sizes[c] == this->virtual_grf_sizes[i]) {
             /* Special case: on pre-GEN6 hardware that supports PLN, the
@@ -254,7 +254,7 @@ fs_visitor::assign_regs()
     * numbers.
     */
    this->grf_used = first_assigned_grf;
-   for (int i = 0; i < this->virtual_grf_next; i++) {
+   for (int i = 0; i < this->virtual_grf_count; i++) {
       int reg = ra_get_node_reg(g, i);
 
       hw_reg_mapping[i] = (first_assigned_grf +
@@ -305,10 +305,10 @@ int
 fs_visitor::choose_spill_reg(struct ra_graph *g)
 {
    float loop_scale = 1.0;
-   float spill_costs[this->virtual_grf_next];
-   bool no_spill[this->virtual_grf_next];
+   float spill_costs[this->virtual_grf_count];
+   bool no_spill[this->virtual_grf_count];
 
-   for (int i = 0; i < this->virtual_grf_next; i++) {
+   for (int i = 0; i < this->virtual_grf_count; i++) {
       spill_costs[i] = 0.0;
       no_spill[i] = false;
    }
@@ -357,7 +357,7 @@ fs_visitor::choose_spill_reg(struct ra_graph *g)
       }
    }
 
-   for (int i = 0; i < this->virtual_grf_next; i++) {
+   for (int i = 0; i < this->virtual_grf_count; i++) {
       if (!no_spill[i])
 	 ra_set_node_spill_cost(g, i, spill_costs[i]);
    }

src/mesa/drivers/dri/i965/brw_fs_schedule_instructions.cpp

@@ -503,7 +503,7 @@ void
 fs_visitor::schedule_instructions()
 {
    fs_inst *next_block_header = (fs_inst *)instructions.head;
-   instruction_scheduler sched(this, mem_ctx, this->virtual_grf_next);
+   instruction_scheduler sched(this, mem_ctx, this->virtual_grf_count);
 
    while (!next_block_header->is_tail_sentinel()) {
       /* Add things to be scheduled until we get to a new BB. */

src/mesa/drivers/dri/i965/brw_fs_visitor.cpp

@@ -2224,7 +2224,7 @@ fs_visitor::fs_visitor(struct brw_wm_compile *c, struct gl_shader_program *prog,
    this->base_ir = NULL;
 
    this->virtual_grf_sizes = NULL;
-   this->virtual_grf_next = 0;
+   this->virtual_grf_count = 0;
    this->virtual_grf_array_size = 0;
    this->virtual_grf_def = NULL;
    this->virtual_grf_use = NULL;