[wasm] Fix wasm interpreter entry for 32 bit big endian systems

src/compiler/wasm-compiler.cc

Index: src/compiler/wasm-compiler.cc
diff --git a/src/compiler/wasm-compiler.cc b/src/compiler/wasm-compiler.cc
index 57a77608f9687f9a34dc6aef05413dcb15ef51ab..5e67fc62eff4404756fff9e72f0174d7fdc624a6 100644
--- a/src/compiler/wasm-compiler.cc
+++ b/src/compiler/wasm-compiler.cc
@@ -2849,7 +2849,11 @@ void WasmGraphBuilder::BuildWasmInterpreterEntry(
         graph()->NewNode(jsgraph()->machine()->Load(load_rep), arg_buffer,
                          Int32Constant(sizeof(int32_t)), lower, *control_);
     *effect_ = upper;
+#if defined(V8_TARGET_LITTLE_ENDIAN)

[Clemens Hammacher, 2017/03/21 08:36:10]

Instead of introducing another "#if defined(...)", can you please use the
kInt64LowerHalfMemoryOffset and kInt64UpperHalfMemoryOffset constants to load
the lower and upper half, similar to the store nodes for the parameters a few
lines above?

[rayb, 2017/03/22 17:21:47]

Done.

     Return(lower, upper);
+#elif defined(V8_TARGET_BIG_ENDIAN)
+    Return(upper, lower);
+#endif
   } else {
     MachineType load_rep = wasm::WasmOpcodes::MachineTypeFor(sig->GetReturn());
     Node* val =