tgsi/scan: add flag colors_written

This is a prerequisite for the following r600g fix.

Cc: 11.0 11.1 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index 4645ef2..e04f407 100644 (file)
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -365,6 +365,9 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
                   info->output_semantic_index[reg] = (ubyte) semIndex;
                   info->num_outputs++;
 
+                  if (semName == TGSI_SEMANTIC_COLOR)
+                     info->colors_written |= 1 << semIndex;
+
                   if (procType == TGSI_PROCESSOR_VERTEX ||
                       procType == TGSI_PROCESSOR_GEOMETRY ||
                       procType == TGSI_PROCESSOR_TESS_CTRL ||

diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index d60ccab..7e9a559 100644 (file)
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -77,6 +77,7 @@ struct tgsi_shader_info
 
    uint opcode_count[TGSI_OPCODE_LAST];  /**< opcode histogram */
 
+   ubyte colors_written;
    boolean reads_position; /**< does fragment shader read position? */
    boolean reads_z; /**< does fragment shader read depth? */
    boolean writes_z;  /**< does fragment shader write Z value? */