From: Timothy Arceri Date: Sat, 21 Nov 2015 08:02:01 +0000 (+1100) Subject: glsl: only call dead code pass when new inputs/outputs demoted X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7436d7c33b65f8f3875d908f08acb15c57f9bd08;p=mesa.git glsl: only call dead code pass when new inputs/outputs demoted This will help avoid eliminating inputs/outputs needed by SSOs. Cc: Gregory Hainaut Reviewed-by: Juha-Pekka Heikkila --- diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp index eac2536efc9..5ff433ccba9 100644 --- a/src/glsl/linker.cpp +++ b/src/glsl/linker.cpp @@ -4327,13 +4327,14 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog) do_dead_builtin_varyings(ctx, sh, NULL, num_tfeedback_decls, tfeedback_decls); - if (!prog->SeparateShader) + if (!prog->SeparateShader) { demote_shader_inputs_and_outputs(sh, ir_var_shader_out); - - /* Eliminate code that is now dead due to unused outputs being demoted. - */ - while (do_dead_code(sh->ir, false)) - ; + /* Eliminate code that is now dead due to unused outputs being + * demoted. + */ + while (do_dead_code(sh->ir, false)) + ; + } } else if (first == MESA_SHADER_FRAGMENT) { /* If the program only contains a fragment shader... @@ -4350,11 +4351,14 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog) 0 /* num_tfeedback_decls */, NULL /* tfeedback_decls */)) goto done; - } else + } else { demote_shader_inputs_and_outputs(sh, ir_var_shader_in); - - while (do_dead_code(sh->ir, false)) - ; + /* Eliminate code that is now dead due to unused inputs being + * demoted. + */ + while (do_dead_code(sh->ir, false)) + ; + } } next = last;