[Mesa-dev] [PATCH] glsl/lower_output_reads: set invariant and precise flags on temporaries

[Karol Herbst]

fixes a couple of deqp tests (on nvc0 and potential other drivers):
dEQP-GLES3.functional.shaders.invariance.highp.common_subexpression_1
dEQP-GLES3.functional.shaders.invariance.highp.common_subexpression_2
dEQP-GLES3.functional.shaders.invariance.highp.common_subexpression_3
dEQP-GLES3.functional.shaders.invariance.mediump.common_subexpression_1
dEQP-GLES3.functional.shaders.invariance.mediump.common_subexpression_2
dEQP-GLES3.functional.shaders.invariance.mediump.common_subexpression_3
dEQP-GLES3.functional.shaders.invariance.lowp.common_subexpression_1
dEQP-GLES3.functional.shaders.invariance.lowp.common_subexpression_2
dEQP-GLES3.functional.shaders.invariance.lowp.common_subexpression_3

Signed-off-by: Karol Herbst <kherbst at redhat.com>
---
 src/compiler/glsl/lower_output_reads.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/compiler/glsl/lower_output_reads.cpp b/src/compiler/glsl/lower_output_reads.cpp
index bd3accb3dda..6d4132854f5 100644
--- a/src/compiler/glsl/lower_output_reads.cpp
+++ b/src/compiler/glsl/lower_output_reads.cpp
@@ -101,6 +101,9 @@ output_read_remover::visit(ir_dereference_variable *ir)
       void *var_ctx = ralloc_parent(ir->var);
       temp = new(var_ctx) ir_variable(ir->var->type, ir->var->name,
                                       ir_var_temporary);
+      /* save invariant and precise flags */
+      temp->data.invariant = ir->var->data.invariant;
+      temp->data.precise = ir->var->data.precise;
       _mesa_hash_table_insert(replacements, ir->var, temp);
       ir->var->insert_after(temp);
    }
-- 
2.20.1