[wasm] Only immutable imported globals are valid initializer expressions

test/cctest/wasm/test-run-wasm-module.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "src/snapshot/code-serializer.h"
 #include "src/version.h"
 #include "src/wasm/module-decoder.h"
@@ skipping 737 matching lines @@
       for (int i = 0; i < padding; i++) {  // pad global after
         builder->AddGlobal(kAstI32, false, false, WasmInitExpr(i + 30000));
       }
 
       WasmFunctionBuilder* f1 = builder->AddFunction(&sig);
       byte code[] = {WASM_GET_GLOBAL(global)};
       f1->EmitCode(code, sizeof(code));
       ExportAsMain(f1);
       TestModule(&zone, builder, expected);
     }
-
-    for (int padding = 0; padding < 5; padding++) {
-      // Test with a global index
-      WasmModuleBuilder* builder = new (&zone) WasmModuleBuilder(&zone);
-      for (int i = 0; i < padding; i++) {  // pad global before
-        builder->AddGlobal(kAstI32, false, false, WasmInitExpr(i + 40000));
-      }
-
-      uint32_t global1 =
-          builder->AddGlobal(type, false, false, WasmInitExpr(expected));
-
-      for (int i = 0; i < padding; i++) {  // pad global middle
-        builder->AddGlobal(kAstI32, false, false, WasmInitExpr(i + 50000));
-      }
-
-      uint32_t global2 =
-          builder->AddGlobal(type, false, false,
-                             WasmInitExpr(WasmInitExpr::kGlobalIndex, global1));
-
-      for (int i = 0; i < padding; i++) {  // pad global after
-        builder->AddGlobal(kAstI32, false, false, WasmInitExpr(i + 60000));
-      }
-
-      WasmFunctionBuilder* f1 = builder->AddFunction(&sig);
-      byte code[] = {WASM_GET_GLOBAL(global2)};
-      f1->EmitCode(code, sizeof(code));
-      ExportAsMain(f1);
-      TestModule(&zone, builder, expected);
-    }
   }
   Cleanup();
 }
 
 TEST(Run_WasmModule_Global_i32) {
   RunWasmModuleGlobalInitTest<int32_t>(kAstI32, -983489);
   RunWasmModuleGlobalInitTest<int32_t>(kAstI32, 11223344);
 }
 
 TEST(Run_WasmModule_Global_f32) {
@@ skipping 35 matching lines @@
     testing::CompileInstantiateWasmModuleForTesting(isolate, &thrower, data,
                                                     data + arraysize(data),
                                                     ModuleOrigin::kWasmOrigin);
     if (thrower.error()) {
       thrower.Reify()->Print();
       CHECK(false);
     }
   }
   Cleanup();
 }