#include "compiler/glsl/ir_optimization.h"
#include "compiler/glsl/program.h"
#include "program/program.h"
+#include "main/mtypes.h"
#include "main/shaderapi.h"
#include "main/shaderobj.h"
#include "main/uniforms.h"
brw_lower_packing_builtins(struct brw_context *brw,
exec_list *ir)
{
+ const struct gen_device_info *devinfo = &brw->screen->devinfo;
+
/* Gens < 7 don't have instructions to convert to or from half-precision,
* and Gens < 6 don't expose that functionality.
*/
- if (brw->gen != 6)
+ if (devinfo->gen != 6)
return;
lower_packing_builtins(ir, LOWER_PACK_HALF_2x16 | LOWER_UNPACK_HALF_2x16);
struct gl_shader_program *shader_prog,
struct gl_linked_shader *shader)
{
+ const struct gen_device_info *devinfo = &brw->screen->devinfo;
struct gl_context *ctx = &brw->ctx;
- const struct brw_compiler *compiler = brw->screen->compiler;
- const struct gl_shader_compiler_options *options =
- &ctx->Const.ShaderCompilerOptions[shader->Stage];
/* Temporary memory context for any new IR. */
void *mem_ctx = ralloc_context(NULL);
EXP_TO_EXP2 |
LOG_TO_LOG2 |
DFREXP_DLDEXP_TO_ARITH);
- if (brw->gen < 7) {
+ if (devinfo->gen < 7) {
instructions_to_lower |= BIT_COUNT_TO_MATH |
EXTRACT_TO_SHIFTS |
INSERT_TO_SHIFTS |
/* Pre-gen6 HW can only nest if-statements 16 deep. Beyond this,
* if-statements need to be flattened.
*/
- if (brw->gen < 6)
+ if (devinfo->gen < 6)
lower_if_to_cond_assign(shader->Stage, shader->ir, 16);
do_lower_texture_projection(shader->ir);
lower_noise(shader->ir);
lower_quadop_vector(shader->ir, false);
- bool progress;
- do {
- progress = false;
-
- if (compiler->scalar_stage[shader->Stage]) {
- if (shader->Stage == MESA_SHADER_VERTEX ||
- shader->Stage == MESA_SHADER_FRAGMENT)
- brw_do_channel_expressions(shader->ir);
- brw_do_vector_splitting(shader->ir);
- }
-
- progress = do_common_optimization(shader->ir, true, true,
- options, ctx->Const.NativeIntegers) || progress;
- } while (progress);
-
validate_ir_tree(shader->ir);
/* Now that we've finished altering the linked IR, reparent any live IR back
}
}
+static void
+update_xfb_info(struct gl_transform_feedback_info *xfb_info,
+ struct shader_info *info)
+{
+ if (!xfb_info)
+ return;
+
+ for (unsigned i = 0; i < xfb_info->NumOutputs; i++) {
+ struct gl_transform_feedback_output *output = &xfb_info->Outputs[i];
+
+ /* The VUE header contains three scalar fields packed together:
+ * - gl_PointSize is stored in VARYING_SLOT_PSIZ.w
+ * - gl_Layer is stored in VARYING_SLOT_PSIZ.y
+ * - gl_ViewportIndex is stored in VARYING_SLOT_PSIZ.z
+ */
+ switch (output->OutputRegister) {
+ case VARYING_SLOT_LAYER:
+ assert(output->NumComponents == 1);
+ output->OutputRegister = VARYING_SLOT_PSIZ;
+ output->ComponentOffset = 1;
+ break;
+ case VARYING_SLOT_VIEWPORT:
+ assert(output->NumComponents == 1);
+ output->OutputRegister = VARYING_SLOT_PSIZ;
+ output->ComponentOffset = 2;
+ break;
+ case VARYING_SLOT_PSIZ:
+ assert(output->NumComponents == 1);
+ output->ComponentOffset = 3;
+ break;
+ }
+
+ info->outputs_written |= 1ull << output->OutputRegister;
+ }
+}
+
extern "C" GLboolean
brw_link_shader(struct gl_context *ctx, struct gl_shader_program *shProg)
{
prog->nir = brw_create_nir(brw, shProg, prog, (gl_shader_stage) stage,
compiler->scalar_stage[stage]);
- infos[stage] = prog->nir->info;
+ }
+
+ /* Determine first and last stage. */
+ unsigned first = MESA_SHADER_STAGES;
+ unsigned last = 0;
+ for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) {
+ if (!shProg->_LinkedShaders[i])
+ continue;
+ if (first == MESA_SHADER_STAGES)
+ first = i;
+ last = i;
+ }
+
+ /* Linking the stages in the opposite order (from fragment to vertex)
+ * ensures that inter-shader outputs written to in an earlier stage
+ * are eliminated if they are (transitively) not used in a later
+ * stage.
+ */
+ if (first != last) {
+ int next = last;
+ for (int i = next - 1; i >= 0; i--) {
+ if (shProg->_LinkedShaders[i] == NULL)
+ continue;
+
+ nir_shader *producer = shProg->_LinkedShaders[i]->Program->nir;
+ nir_shader *consumer = shProg->_LinkedShaders[next]->Program->nir;
+
+ nir_remove_dead_variables(producer, nir_var_shader_out);
+ nir_remove_dead_variables(consumer, nir_var_shader_in);
+
+ if (nir_remove_unused_varyings(producer, consumer)) {
+ nir_lower_global_vars_to_local(producer);
+ nir_lower_global_vars_to_local(consumer);
+
+ nir_variable_mode indirect_mask = (nir_variable_mode) 0;
+ if (compiler->glsl_compiler_options[i].EmitNoIndirectTemp)
+ indirect_mask = (nir_variable_mode) nir_var_local;
+
+ /* The backend might not be able to handle indirects on
+ * temporaries so we need to lower indirects on any of the
+ * varyings we have demoted here.
+ */
+ nir_lower_indirect_derefs(producer, indirect_mask);
+ nir_lower_indirect_derefs(consumer, indirect_mask);
+
+ const bool p_is_scalar = compiler->scalar_stage[producer->stage];
+ shProg->_LinkedShaders[i]->Program->nir =
+ brw_nir_optimize(producer, compiler, p_is_scalar);
+
+ const bool c_is_scalar = compiler->scalar_stage[producer->stage];
+ shProg->_LinkedShaders[next]->Program->nir =
+ brw_nir_optimize(consumer, compiler, c_is_scalar);
+ }
+
+ next = i;
+ }
+ }
+
+ for (stage = 0; stage < ARRAY_SIZE(shProg->_LinkedShaders); stage++) {
+ struct gl_linked_shader *shader = shProg->_LinkedShaders[stage];
+ if (!shader)
+ continue;
+
+ struct gl_program *prog = shader->Program;
+ nir_shader *nir = shader->Program->nir;
+ brw_shader_gather_info(nir, prog);
+
+ NIR_PASS_V(nir, nir_lower_samplers, shProg);
+ NIR_PASS_V(nir, nir_lower_atomics, shProg);
+
+ infos[stage] = &prog->nir->info;
+
+ update_xfb_info(prog->sh.LinkedTransformFeedback, infos[stage]);
/* Make a pass over the IR to add state references for any built-in
* uniforms that are used. This has to be done now (during linking).
projects / mesa.git / blobdiff