diff options
| author | Ilia Mirkin <[email protected]> | 2014-07-21 21:59:37 -0400 |
|---|---|---|
| committer | Marek Olšák <[email protected]> | 2015-07-23 00:59:28 +0200 |
| commit | 567f1b2ee89bf05f0600e9e79847140555f0a035 (patch) | |
| tree | a98dcb1c40df75bd078f40788b196ba71edc7a82 /src/glsl | |
| parent | 61846f222fffeba846f9f7277aba9cc7d48323ed (diff) | |
glsl: pass shader stage to lower_output_reads and handle tess control
Tessellation control outputs can be read in directly without first
having been written. Accessing these will require some special logic
anyways, so just let them through.
V2: Never lower tess control output reads, whether patch or not -- both
can be read back by other threads.
Signed-off-by: Ilia Mirkin <[email protected]>
Signed-off-by: Chris Forbes <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
Diffstat (limited to 'src/glsl')
| -rw-r--r-- | src/glsl/ir_optimization.h | 2 | ||||
| -rw-r--r-- | src/glsl/lower_output_reads.cpp | 13 |
2 files changed, 10 insertions, 5 deletions
diff --git a/src/glsl/ir_optimization.h b/src/glsl/ir_optimization.h index a174c9683a1..766b723df0b 100644 --- a/src/glsl/ir_optimization.h +++ b/src/glsl/ir_optimization.h @@ -120,7 +120,7 @@ bool lower_variable_index_to_cond_assign(gl_shader_stage stage, bool lower_quadop_vector(exec_list *instructions, bool dont_lower_swz); bool lower_const_arrays_to_uniforms(exec_list *instructions); bool lower_clip_distance(gl_shader *shader); -void lower_output_reads(exec_list *instructions); +void lower_output_reads(unsigned stage, exec_list *instructions); bool lower_packing_builtins(exec_list *instructions, int op_mask); void lower_ubo_reference(struct gl_shader *shader, exec_list *instructions); void lower_packed_varyings(void *mem_ctx, diff --git a/src/glsl/lower_output_reads.cpp b/src/glsl/lower_output_reads.cpp index 1ee815d5ece..79488df2932 100644 --- a/src/glsl/lower_output_reads.cpp +++ b/src/glsl/lower_output_reads.cpp @@ -48,8 +48,10 @@ protected: hash_table *replacements; void *mem_ctx; + + unsigned stage; public: - output_read_remover(); + output_read_remover(unsigned stage); ~output_read_remover(); virtual ir_visitor_status visit(class ir_dereference_variable *); virtual ir_visitor_status visit_leave(class ir_emit_vertex *); @@ -75,8 +77,9 @@ hash_table_var_hash(const void *key) return hash_table_string_hash(var->name); } -output_read_remover::output_read_remover() +output_read_remover::output_read_remover(unsigned stage) { + this->stage = stage; mem_ctx = ralloc_context(NULL); replacements = hash_table_ctor(0, hash_table_var_hash, hash_table_pointer_compare); @@ -93,6 +96,8 @@ output_read_remover::visit(ir_dereference_variable *ir) { if (ir->var->data.mode != ir_var_shader_out) return visit_continue; + if (stage == MESA_SHADER_TESS_CTRL) + return visit_continue; ir_variable *temp = (ir_variable *) hash_table_find(replacements, ir->var); @@ -166,8 +171,8 @@ output_read_remover::visit_leave(ir_function_signature *sig) } void -lower_output_reads(exec_list *instructions) +lower_output_reads(unsigned stage, exec_list *instructions) { - output_read_remover v; + output_read_remover v(stage); visit_list_elements(&v, instructions); } |