tgsi/scan: fix tgsi_shader_info::reads_z

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Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index e3feed9..e3a6fb0 100644 (file)
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -187,8 +187,9 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
                   }
 
                   if (procType == TGSI_PROCESSOR_FRAGMENT &&
-                      info->reads_position &&
-                      src->Register.Index == 0 &&
+                     !src->Register.Indirect &&
+                     info->input_semantic_name[src->Register.Index] ==
+                     TGSI_SEMANTIC_POSITION &&
                       (src->Register.SwizzleX == TGSI_SWIZZLE_Z ||
                        src->Register.SwizzleY == TGSI_SWIZZLE_Z ||
                        src->Register.SwizzleZ == TGSI_SWIZZLE_Z ||