From: Neil Roberts <nroberts@igalia.com>
Date: Thu, 25 Jan 2018 18:15:39 +0000 (+0100)
Subject: intel/compiler: Add a uses_firstvertex flag
X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=commitdiff_plain;h=0c8395e15d295d328f68574e71afaf04596e2a82

intel/compiler: Add a uses_firstvertex flag

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/intel/compiler/brw_compiler.h b/src/intel/compiler/brw_compiler.h
index 875b2936fd8..24196248b8e 100644
--- a/src/intel/compiler/brw_compiler.h
+++ b/src/intel/compiler/brw_compiler.h
@@ -978,6 +978,7 @@ struct brw_vs_prog_data {
    bool uses_vertexid;
    bool uses_instanceid;
    bool uses_basevertex;
+   bool uses_firstvertex;
    bool uses_baseinstance;
    bool uses_drawid;
 };
diff --git a/src/intel/compiler/brw_vec4.cpp b/src/intel/compiler/brw_vec4.cpp
index 218925ccb12..9459d61af6c 100644
--- a/src/intel/compiler/brw_vec4.cpp
+++ b/src/intel/compiler/brw_vec4.cpp
@@ -2836,6 +2836,10 @@ brw_compile_vs(const struct brw_compiler *compiler, void *log_data,
        BITFIELD64_BIT(SYSTEM_VALUE_BASE_VERTEX))
       prog_data->uses_basevertex = true;
 
+   if (shader->info.system_values_read &
+       BITFIELD64_BIT(SYSTEM_VALUE_FIRST_VERTEX))
+      prog_data->uses_firstvertex = true;
+
    if (shader->info.system_values_read &
        BITFIELD64_BIT(SYSTEM_VALUE_BASE_INSTANCE))
       prog_data->uses_baseinstance = true;