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* Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com>
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* Copyright 2009 Marek OlÅ”Ć”k <maraeo@gmail.com>
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* on the rights to use, copy, modify, merge, publish, distribute, sub
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* license, and/or sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "r300_context.h"
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#include "r300_screen.h"
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#include "r300_tgsi_to_rc.h"
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#include "tgsi/tgsi_dump.h"
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#include "tgsi/tgsi_parse.h"
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#include "tgsi/tgsi_ureg.h"
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#include "compiler/radeon_compiler.h"
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/* Convert info about VS output semantics into r300_shader_semantics. */
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static void r300_shader_read_vs_outputs(
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struct r300_context *r300,
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struct tgsi_shader_info* info,
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struct r300_shader_semantics* vs_outputs)
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r300_shader_semantics_reset(vs_outputs);
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for (i = 0; i < info->num_outputs; i++) {
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index = info->output_semantic_index[i];
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switch (info->output_semantic_name[i]) {
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case TGSI_SEMANTIC_POSITION:
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case TGSI_SEMANTIC_PSIZE:
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vs_outputs->psize = i;
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case TGSI_SEMANTIC_COLOR:
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assert(index < ATTR_COLOR_COUNT);
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vs_outputs->color[index] = i;
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case TGSI_SEMANTIC_BCOLOR:
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assert(index < ATTR_COLOR_COUNT);
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vs_outputs->bcolor[index] = i;
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case TGSI_SEMANTIC_GENERIC:
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assert(index < ATTR_GENERIC_COUNT);
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vs_outputs->generic[index] = i;
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vs_outputs->num_generic++;
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case TGSI_SEMANTIC_FOG:
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case TGSI_SEMANTIC_EDGEFLAG:
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fprintf(stderr, "r300 VP: cannot handle edgeflag output.\n");
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case TGSI_SEMANTIC_CLIPVERTEX:
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/* Draw does clip vertex for us. */
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if (r300->screen->caps.has_tcl) {
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fprintf(stderr, "r300 VP: cannot handle clip vertex output.\n");
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fprintf(stderr, "r300 VP: unknown vertex output semantic: %i.\n",
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info->output_semantic_name[i]);
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/* WPOS is a straight copy of POSITION and it's always emitted. */
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vs_outputs->wpos = i;
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static void set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c)
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struct r300_vertex_shader * vs = c->UserData;
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struct r300_shader_semantics* outputs = &vs->outputs;
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struct tgsi_shader_info* info = &vs->info;
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boolean any_bcolor_used = outputs->bcolor[0] != ATTR_UNUSED ||
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outputs->bcolor[1] != ATTR_UNUSED;
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/* Fill in the input mapping */
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for (i = 0; i < info->num_inputs; i++)
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c->code->inputs[i] = i;
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if (outputs->pos != ATTR_UNUSED) {
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c->code->outputs[outputs->pos] = reg++;
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if (outputs->psize != ATTR_UNUSED) {
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c->code->outputs[outputs->psize] = reg++;
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/* If we're writing back facing colors we need to send
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* four colors to make front/back face colors selection work.
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* If the vertex program doesn't write all 4 colors, lets
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* pretend it does by skipping output index reg so the colors
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* get written into appropriate output vectors.
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for (i = 0; i < ATTR_COLOR_COUNT; i++) {
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if (outputs->color[i] != ATTR_UNUSED) {
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c->code->outputs[outputs->color[i]] = reg++;
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} else if (any_bcolor_used ||
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outputs->color[1] != ATTR_UNUSED) {
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/* Back-face colors. */
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for (i = 0; i < ATTR_COLOR_COUNT; i++) {
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if (outputs->bcolor[i] != ATTR_UNUSED) {
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c->code->outputs[outputs->bcolor[i]] = reg++;
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} else if (any_bcolor_used) {
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/* Texture coordinates. */
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for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
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if (outputs->generic[i] != ATTR_UNUSED) {
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c->code->outputs[outputs->generic[i]] = reg++;
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/* Fog coordinates. */
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if (outputs->fog != ATTR_UNUSED) {
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c->code->outputs[outputs->fog] = reg++;
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c->code->outputs[outputs->wpos] = reg++;
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void r300_init_vs_outputs(struct r300_context *r300,
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struct r300_vertex_shader *vs)
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tgsi_scan_shader(vs->state.tokens, &vs->info);
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r300_shader_read_vs_outputs(r300, &vs->info, &vs->outputs);
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static void r300_dummy_vertex_shader(
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struct r300_context* r300,
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struct r300_vertex_shader* shader)
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struct ureg_program *ureg;
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/* Make a simple vertex shader which outputs (0, 0, 0, 1),
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* effectively rendering nothing. */
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ureg = ureg_create(TGSI_PROCESSOR_VERTEX);
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dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
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imm = ureg_imm4f(ureg, 0, 0, 0, 1);
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ureg_MOV(ureg, dst, imm);
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shader->state.tokens = tgsi_dup_tokens(ureg_finalize(ureg));
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shader->dummy = TRUE;
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r300_init_vs_outputs(r300, shader);
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r300_translate_vertex_shader(r300, shader);
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void r300_translate_vertex_shader(struct r300_context *r300,
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struct r300_vertex_shader *vs)
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struct r300_vertex_program_compiler compiler;
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struct tgsi_to_rc ttr;
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/* Setup the compiler */
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memset(&compiler, 0, sizeof(compiler));
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rc_init(&compiler.Base, NULL);
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DBG_ON(r300, DBG_VP) ? compiler.Base.Debug |= RC_DBG_LOG : 0;
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DBG_ON(r300, DBG_P_STAT) ? compiler.Base.Debug |= RC_DBG_STATS : 0;
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compiler.code = &vs->code;
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compiler.UserData = vs;
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compiler.Base.is_r500 = r300->screen->caps.is_r500;
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compiler.Base.disable_optimizations = DBG_ON(r300, DBG_NO_OPT);
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compiler.Base.has_half_swizzles = FALSE;
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compiler.Base.has_presub = FALSE;
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compiler.Base.has_omod = FALSE;
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compiler.Base.max_temp_regs = 32;
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compiler.Base.max_constants = 256;
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compiler.Base.max_alu_insts = r300->screen->caps.is_r500 ? 1024 : 256;
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if (compiler.Base.Debug & RC_DBG_LOG) {
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DBG(r300, DBG_VP, "r300: Initial vertex program\n");
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tgsi_dump(vs->state.tokens, 0);
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/* Translate TGSI to our internal representation */
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ttr.compiler = &compiler.Base;
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ttr.info = &vs->info;
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ttr.use_half_swizzles = FALSE;
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r300_tgsi_to_rc(&ttr, vs->state.tokens);
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fprintf(stderr, "r300 VP: Cannot translate a shader. "
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"Using a dummy shader instead.\n");
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r300_dummy_vertex_shader(r300, vs);
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if (compiler.Base.Program.Constants.Count > 200) {
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compiler.Base.remove_unused_constants = TRUE;
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compiler.RequiredOutputs = ~(~0 << (vs->info.num_outputs + 1));
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compiler.SetHwInputOutput = &set_vertex_inputs_outputs;
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/* Insert the WPOS output. */
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rc_copy_output(&compiler.Base, 0, vs->outputs.wpos);
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/* Invoke the compiler */
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r3xx_compile_vertex_program(&compiler);
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if (compiler.Base.Error) {
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fprintf(stderr, "r300 VP: Compiler error:\n%sUsing a dummy shader"
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" instead.\n", compiler.Base.ErrorMsg);
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fprintf(stderr, "r300 VP: Cannot compile the dummy shader! "
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rc_destroy(&compiler.Base);
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r300_dummy_vertex_shader(r300, vs);
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/* Initialize numbers of constants for each type. */
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vs->externals_count = 0;
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i < vs->code.constants.Count &&
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vs->code.constants.Constants[i].Type == RC_CONSTANT_EXTERNAL; i++) {
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vs->externals_count = i+1;
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for (; i < vs->code.constants.Count; i++) {
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assert(vs->code.constants.Constants[i].Type == RC_CONSTANT_IMMEDIATE);
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vs->immediates_count = vs->code.constants.Count - vs->externals_count;
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/* And, finally... */
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rc_destroy(&compiler.Base);