[SPIRV] Add assertion to simplify debugging (llvm#152139)

Author: maarquitos14

llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.cpp

@@ -840,6 +840,8 @@ SPIRVType *SPIRVGlobalRegistry::getOpTypeArray(uint32_t NumElems,
           .addUse(NumElementsVReg);
     });
   } else {
+    assert(ST.isShader() && "Runtime arrays are not allowed in non-shader "
+                            "SPIR-V modules.");
     if (!ST.isShader())
       return nullptr;
     ArrayType = createOpType(MIRBuilder, [&](MachineIRBuilder &MIRBuilder) {