diff options
Diffstat (limited to 'src/compiler')
| -rw-r--r-- | src/compiler/glsl/ir_optimization.h | 2 | ||||
| -rw-r--r-- | src/compiler/glsl/linker.cpp | 3 | ||||
| -rw-r--r-- | src/compiler/glsl/lower_ubo_reference.cpp | 36 |
3 files changed, 35 insertions, 6 deletions
diff --git a/src/compiler/glsl/ir_optimization.h b/src/compiler/glsl/ir_optimization.h index 71b10e4d643..ba14e34b71e 100644 --- a/src/compiler/glsl/ir_optimization.h +++ b/src/compiler/glsl/ir_optimization.h @@ -123,7 +123,7 @@ bool lower_clip_cull_distance(struct gl_shader_program *prog, gl_shader *shader) void lower_output_reads(unsigned stage, exec_list *instructions); bool lower_packing_builtins(exec_list *instructions, int op_mask); void lower_shared_reference(struct gl_shader *shader, unsigned *shared_size); -void lower_ubo_reference(struct gl_shader *shader); +void lower_ubo_reference(struct gl_shader *shader, bool clamp_block_indices); void lower_packed_varyings(void *mem_ctx, unsigned locations_used, ir_variable_mode mode, unsigned gs_input_vertices, gl_shader *shader, diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp index 89cd9f795cc..3d95540256c 100644 --- a/src/compiler/glsl/linker.cpp +++ b/src/compiler/glsl/linker.cpp @@ -4906,7 +4906,8 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog) &ctx->Const.ShaderCompilerOptions[i]; if (options->LowerBufferInterfaceBlocks) - lower_ubo_reference(prog->_LinkedShaders[i]); + lower_ubo_reference(prog->_LinkedShaders[i], + options->ClampBlockIndicesToArrayBounds); if (options->LowerShaderSharedVariables) lower_shared_reference(prog->_LinkedShaders[i], diff --git a/src/compiler/glsl/lower_ubo_reference.cpp b/src/compiler/glsl/lower_ubo_reference.cpp index 1a0140fad15..749deedcd1c 100644 --- a/src/compiler/glsl/lower_ubo_reference.cpp +++ b/src/compiler/glsl/lower_ubo_reference.cpp @@ -44,8 +44,10 @@ namespace { class lower_ubo_reference_visitor : public lower_buffer_access::lower_buffer_access { public: - lower_ubo_reference_visitor(struct gl_shader *shader) - : shader(shader), struct_field(NULL), variable(NULL) + lower_ubo_reference_visitor(struct gl_shader *shader, + bool clamp_block_indices) + : shader(shader), clamp_block_indices(clamp_block_indices), + struct_field(NULL), variable(NULL) { } @@ -104,6 +106,7 @@ public: ir_visitor_status visit_enter(ir_call *ir); struct gl_shader *shader; + bool clamp_block_indices; struct gl_uniform_buffer_variable *ubo_var; const struct glsl_struct_field *struct_field; ir_variable *variable; @@ -242,6 +245,26 @@ interface_field_name(void *mem_ctx, char *base_name, ir_rvalue *d, return NULL; } +static ir_rvalue * +clamp_to_array_bounds(void *mem_ctx, ir_rvalue *index, const glsl_type *type) +{ + assert(type->is_array()); + + const unsigned array_size = type->arrays_of_arrays_size(); + + ir_constant *max_index = new(mem_ctx) ir_constant(array_size - 1); + max_index->type = index->type; + + ir_constant *zero = new(mem_ctx) ir_constant(0); + zero->type = index->type; + + if (index->type->base_type == GLSL_TYPE_INT) + index = max2(index, zero); + index = min2(index, max_index); + + return index; +} + void lower_ubo_reference_visitor::setup_for_load_or_store(void *mem_ctx, ir_variable *var, @@ -258,6 +281,11 @@ lower_ubo_reference_visitor::setup_for_load_or_store(void *mem_ctx, interface_field_name(mem_ctx, (char *) var->get_interface_type()->name, deref, &nonconst_block_index); + if (nonconst_block_index && clamp_block_indices) { + nonconst_block_index = + clamp_to_array_bounds(mem_ctx, nonconst_block_index, var->type); + } + /* Locate the block by interface name */ unsigned num_blocks; struct gl_uniform_block **blocks; @@ -1062,9 +1090,9 @@ lower_ubo_reference_visitor::visit_enter(ir_call *ir) } /* unnamed namespace */ void -lower_ubo_reference(struct gl_shader *shader) +lower_ubo_reference(struct gl_shader *shader, bool clamp_block_indices) { - lower_ubo_reference_visitor v(shader); + lower_ubo_reference_visitor v(shader, clamp_block_indices); /* Loop over the instructions lowering references, because we take * a deref of a UBO array using a UBO dereference as the index will |