glsl/linker: Allow fragment output overlap for gl_LastFragData.

gl_LastFragData overlaps gl_FragData by definition.

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

diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp
index a1a65ef..4b404ff 100644 (file)
--- a/src/compiler/glsl/linker.cpp
+++ b/src/compiler/glsl/linker.cpp
@@ -2673,6 +2673,9 @@ assign_attribute_or_color_locations(void *mem_ctx,
          }
       }
 
+      if (strcmp(var->name, "gl_LastFragData") == 0)
+         continue;
+
       /* From GL4.5 core spec, section 15.2 (Shader Execution):
        *
        *     "Output binding assignments will cause LinkProgram to fail: