glsl: Add uniform_locations_assigned parameter to do_dead_code opt pass

Setting this flag prevents declarations of uniforms from being removed
from the IR.  Since the IR is directly used by several API functions
that query uniforms in shaders, uniform declarations cannot be removed
after the locations have been set.  However, it should still be safe
to reorder the declarations (this is not tested).

Signed-off-by: Ian Romanick <[email protected]>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=41980
Tested-by: Brian Paul <[email protected]>
Reviewed-by: Bryan Cain <[email protected]>
Cc: Vinson Lee <[email protected]>
Cc: José Fonseca <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Yuanhan Liu <[email protected]>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp b/src/mesa/drivers/dri/i965/brw_shader.cpp
index 0858c4032bb..d9d9414543d 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.cpp
+++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
@@ -138,7 +138,8 @@ brw_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
 				   false /* loops */
 				   ) || progress;
 
-	 progress = do_common_optimization(shader->ir, true, 32) || progress;
+	 progress = do_common_optimization(shader->ir, true, true, 32)
+	   || progress;
       } while (progress);
 
       validate_ir_tree(shader->ir);