From: Neil Roberts <nroberts@igalia.com>
Date: Tue, 12 Dec 2017 16:22:49 +0000 (+0100)
Subject: spirv: Handle XFB variable decorations
X-Git-Tag: upstream/19.0.0~3488
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cd4a14be063957964ae54e0e828174b9e40961e0;p=platform%2Fupstream%2Fmesa.git

spirv: Handle XFB variable decorations

These set the new explicit XFB members on nir_variable.

This is needed to support ARB_gl_spirv, as Vulkan doesn't support
transform feedback.

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
---

diff --git a/src/compiler/spirv/vtn_variables.c b/src/compiler/spirv/vtn_variables.c
index fbfea6f..6ff2e83 100644
--- a/src/compiler/spirv/vtn_variables.c
+++ b/src/compiler/spirv/vtn_variables.c
@@ -1299,7 +1299,6 @@ apply_var_decoration(struct vtn_builder *b,
    case SpvDecorationAliased:
    case SpvDecorationUniform:
    case SpvDecorationStream:
-   case SpvDecorationOffset:
    case SpvDecorationLinkageAttributes:
       break; /* Do nothing with these here */
 
@@ -1326,9 +1325,16 @@ apply_var_decoration(struct vtn_builder *b,
       break;
 
    case SpvDecorationXfbBuffer:
+      var_data->explicit_xfb_buffer = true;
+      var_data->xfb_buffer = dec->literals[0];
+      break;
    case SpvDecorationXfbStride:
-      vtn_warn("Vulkan does not have transform feedback: %s",
-               spirv_decoration_to_string(dec->decoration));
+      var_data->explicit_xfb_stride = true;
+      var_data->xfb_stride = dec->literals[0];
+      break;
+   case SpvDecorationOffset:
+      var_data->explicit_offset = true;
+      var_data->offset = dec->literals[0];
       break;
 
    case SpvDecorationCPacked: