More precisely check for the qualifiers that enable the vulkan memory model for buffer references.

Not all memory qualifiers necessarily need the vulkan memory model, e.g. volatile/restrict that correspond to core SPIR-V features do not.

glslang/Include/Types.h

@@ -537,6 +537,11 @@ public:
     {
         return subgroupcoherent || workgroupcoherent || queuefamilycoherent || devicecoherent || coherent || volatil || restrict || readonly || writeonly;
     }
+    bool bufferReferenceNeedsVulkanMemoryModel() const
+    {
+        // include qualifiers that map to load/store availability/visibility/nonprivate memory access operands
+        return subgroupcoherent || workgroupcoherent || queuefamilycoherent || devicecoherent || coherent || nonprivate;
+    }
 
     bool isInterpolation() const
     {

glslang/MachineIndependent/ParseHelper.cpp

@@ -355,7 +355,7 @@ TIntermTyped* TParseContext::handleVariable(const TSourceLoc& loc, TSymbol* symb
         intermediate.addIoAccessed(*string);
 
     if (variable->getType().getBasicType() == EbtReference &&
-        variable->getType().getQualifier().isMemory()) {
+        variable->getType().getQualifier().bufferReferenceNeedsVulkanMemoryModel()) {
         intermediate.setUseVulkanMemoryModel();
     }