Atomic memory function can only be used for shader storage block member or shared variable.

The glsl spec says:A shader will fail to compile if the value passed to the mem argument of an atomic memory function does not
correspond to a buffer or shared variable.

gtests/AST.FromFile.cpp

@@ -282,6 +282,7 @@ INSTANTIATE_TEST_SUITE_P(
         "terminate.vert",
         "negativeWorkGroupSize.comp",
         "textureoffset_sampler2darrayshadow.vert",
+        "atomicAdd.comp",
     })),
     FileNameAsCustomTestSuffix
 );