glsl: add missing support for explicit components in interface blocks

From the ARB_enhanced_layouts spec:

   "As with input layout qualifiers, all shaders except compute shaders
   allow *location* layout qualifiers on output variable declarations,
   output block declarations, and output block member declarations.  Of
   these, variables and block members (but not blocks) additionally
   allow the *component* layout qualifier."

We previously had compile tests in piglit to make sure this was not a
compile error but no execution tests.

Fixes: d99a040bbf2c ("i965: enable ARB_enhanced_layouts for gen8+")

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10763>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/compiler/glsl/lower_named_interface_blocks.cpp b/src/compiler/glsl/lower_named_interface_blocks.cpp
index 01c50932a9a..98d27b7109e 100644
--- a/src/compiler/glsl/lower_named_interface_blocks.cpp
+++ b/src/compiler/glsl/lower_named_interface_blocks.cpp
@@ -180,7 +180,12 @@ flatten_named_interface_blocks_declarations::run(exec_list *instructions)
                                            (ir_variable_mode) var->data.mode);
             }
             new_var->data.location = iface_t->fields.structure[i].location;
+            new_var->data.location_frac =
+               iface_t->fields.structure[i].component >= 0 ?
+                  iface_t->fields.structure[i].component : 0;
             new_var->data.explicit_location = (new_var->data.location >= 0);
+            new_var->data.explicit_component =
+               (iface_t->fields.structure[i].component >= 0);
             new_var->data.offset = iface_t->fields.structure[i].offset;
             new_var->data.explicit_xfb_offset =
                (iface_t->fields.structure[i].offset >= 0);