[Mlir-commits] [mlir] 5a33f99 - [mlir][spirv] (De)serialize Index decoration (#174396)

[llvmlistbot at llvm.org]

Author: Igor Wodiany
Date: 2026-01-05T14:38:36Z
New Revision: 5a33f99811d29cdf7469104583a30ed854444151

URL: https://github.com/llvm/llvm-project/commit/5a33f99811d29cdf7469104583a30ed854444151
DIFF: https://github.com/llvm/llvm-project/commit/5a33f99811d29cdf7469104583a30ed854444151.diff

LOG: [mlir][spirv] (De)serialize Index decoration (#174396)

Added: 
    

Modified: 
    mlir/lib/Target/SPIRV/Deserialization/Deserializer.cpp
    mlir/lib/Target/SPIRV/Serialization/Serializer.cpp
    mlir/test/Target/SPIRV/decorations.mlir

Removed: 
    


################################################################################
diff  --git a/mlir/lib/Target/SPIRV/Deserialization/Deserializer.cpp b/mlir/lib/Target/SPIRV/Deserialization/Deserializer.cpp
index ce7e7dc4116c8..8d1f9c26fe596 100644
--- a/mlir/lib/Target/SPIRV/Deserialization/Deserializer.cpp
+++ b/mlir/lib/Target/SPIRV/Deserialization/Deserializer.cpp
@@ -355,6 +355,7 @@ LogicalResult spirv::Deserializer::processDecoration(ArrayRef<uint32_t> words) {
     break;
   case spirv::Decoration::Location:
   case spirv::Decoration::SpecId:
+  case spirv::Decoration::Index:
     if (words.size() != 3) {
       return emitError(unknownLoc, "OpDecoration with ")
              << decorationName << "needs a single integer literal";

diff  --git a/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp b/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp
index c29d20f755332..840c9c990f9c6 100644
--- a/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp
+++ b/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp
@@ -338,6 +338,7 @@ LogicalResult Serializer::processDecorationAttr(Location loc, uint32_t resultID,
   case spirv::Decoration::Binding:
   case spirv::Decoration::DescriptorSet:
   case spirv::Decoration::Location:
+  case spirv::Decoration::Index:
     if (auto intAttr = dyn_cast<IntegerAttr>(attr)) {
       args.push_back(intAttr.getValue().getZExtValue());
       break;

diff  --git a/mlir/test/Target/SPIRV/decorations.mlir b/mlir/test/Target/SPIRV/decorations.mlir
index 29b5d4fd5c743..f64d113ebba9d 100644
--- a/mlir/test/Target/SPIRV/decorations.mlir
+++ b/mlir/test/Target/SPIRV/decorations.mlir
@@ -84,6 +84,13 @@ spirv.module Logical GLSL450 requires #spirv.vce<v1.0, [Shader, Linkage], []> {
 
 // -----
 
+spirv.module Logical GLSL450 requires #spirv.vce<v1.0, [Shader, Linkage], []> {
+  // CHECK: index = 42
+  spirv.GlobalVariable @var {index = 42 : i32} : !spirv.ptr<vector<2xf32>, Output>
+}
+
+// -----
+
 spirv.module Logical GLSL450 requires #spirv.vce<v1.0, [Shader, Linkage], []> {
   // CHECK: linkage_attributes = #spirv.linkage_attributes<linkage_name = "outSideGlobalVar1", linkage_type = <Import>>
   spirv.GlobalVariable @var1 {