MIPS[64]: Fix unaligned arguments storage in Wasm-to-interpreter entry

src/wasm/wasm-debug.cc

Index: src/wasm/wasm-debug.cc
diff --git a/src/wasm/wasm-debug.cc b/src/wasm/wasm-debug.cc
index 2c6f8c1d0abaff6043b9552536e5baf54712b3b8..c00a4f1ddd0f6b487ac1bf0502f57fe3ced0026d 100644
--- a/src/wasm/wasm-debug.cc
+++ b/src/wasm/wasm-debug.cc
@@ -85,11 +85,11 @@ class InterpreterHandle {
     ScopedVector<WasmVal> wasm_args(num_params);
     uint8_t* arg_buf_ptr = arg_buffer;
     for (int i = 0; i < num_params; ++i) {
-      uint32_t param_size = 1 << ElementSizeLog2Of(sig->GetParam(i));
+      int param_size = 1 << ElementSizeLog2Of(sig->GetParam(i));
 #define CASE_ARG_TYPE(type, ctype)                                  \
   case type:                                                        \
     DCHECK_EQ(param_size, sizeof(ctype));                           \
-    wasm_args[i] = WasmVal(ReadUnalignedValue<ctype>(arg_buf_ptr)); \
+    wasm_args[i] = WasmVal(*reinterpret_cast<ctype*>(arg_buf_ptr)); \
     break;
       switch (sig->GetParam(i)) {
         CASE_ARG_TYPE(kWasmI32, uint32_t)
@@ -100,7 +100,7 @@ class InterpreterHandle {
         default:
           UNREACHABLE();
       }
-      arg_buf_ptr += param_size;
+      arg_buf_ptr += RoundUpToMultipleOfPowOf2(param_size, 8);
     }
 
     WasmInterpreter::Thread* thread = interpreter_.GetThread(0);
@@ -143,7 +143,7 @@ class InterpreterHandle {
 #define CASE_RET_TYPE(type, ctype)                                       \
   case type:                                                             \
     DCHECK_EQ(1 << ElementSizeLog2Of(sig->GetReturn(0)), sizeof(ctype)); \
-    WriteUnalignedValue<ctype>(arg_buffer, ret_val.to<ctype>());         \
+    *reinterpret_cast<ctype*>(arg_buffer) = ret_val.to<ctype>();         \
     break;
       switch (sig->GetReturn(0)) {
         CASE_RET_TYPE(kWasmI32, uint32_t)