From 354f7f2cb9c7206e12646c79d8ff5becbaffa61b Mon Sep 17 00:00:00 2001 From: =?utf8?q?Samuel=20Iglesias=20Gons=C3=A1lvez?= Date: Fri, 5 May 2017 10:42:15 +0200 Subject: [PATCH] i965/vec4/gs: restore the uniform values which was overwritten by failed vec4_gs_visitor execution MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit We are going to add a packing feature to reduce the usage of the push constant buffer. One of the consequences is that 'nr_params' would be modified by vec4_visitor's run call, so we need to restore it if one of them failed before executing the fallback ones. Same thing happens to the uniforms values that would be reordered afterwards. Fixes GL45-CTS.arrays_of_arrays_gl.InteractionFunctionCalls2 when the dvec4 alignment and packing patch is applied. Signed-off-by: Samuel Iglesias Gonsálvez Cc: "17.1" Acked-by: Francisco Jerez --- src/intel/compiler/brw_vec4_gs_visitor.cpp | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/src/intel/compiler/brw_vec4_gs_visitor.cpp b/src/intel/compiler/brw_vec4_gs_visitor.cpp index 791ee7e1dff..d0236df0912 100644 --- a/src/intel/compiler/brw_vec4_gs_visitor.cpp +++ b/src/intel/compiler/brw_vec4_gs_visitor.cpp @@ -876,10 +876,36 @@ brw_compile_gs(const struct brw_compiler *compiler, void *log_data, vec4_gs_visitor v(compiler, log_data, &c, prog_data, shader, mem_ctx, true /* no_spills */, shader_time_index); + + /* Backup 'nr_params' and 'param' as they can be modified by the + * the DUAL_OBJECT visitor. If it fails, we will run the fallback + * (DUAL_INSTANCED or SINGLE mode) and we need to restore original + * values. + */ + const unsigned param_count = prog_data->base.base.nr_params; + gl_constant_value **param = ralloc_array(NULL, gl_constant_value*, + param_count); + memcpy(param, prog_data->base.base.param, + sizeof(gl_constant_value*) * param_count); + if (v.run()) { + /* Success! Backup is not needed */ + ralloc_free(param); return brw_vec4_generate_assembly(compiler, log_data, mem_ctx, shader, &prog_data->base, v.cfg, final_assembly_size); + } else { + /* These variables could be modified by the execution of the GS + * visitor if it packed the uniforms in the push constant buffer. + * As it failed, we need restore them so we can start again with + * DUAL_INSTANCED or SINGLE mode. + * + * FIXME: Could more variables be modified by this execution? + */ + memcpy(prog_data->base.base.param, param, + sizeof(gl_constant_value*) * param_count); + prog_data->base.base.nr_params = param_count; + ralloc_free(param); } } } -- 2.30.2