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

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 da04b3d410d54c659e4a77ae63b22026ac3ac1d8..76fced92693793768f384a185462998c73090751 100644
--- a/src/compiler/wasm-compiler.cc
+++ b/src/compiler/wasm-compiler.cc
@@ -2951,7 +2951,8 @@ void WasmGraphBuilder::BuildWasmInterpreterEntry(
   // Compute size for the argument buffer.
   int args_size_bytes = 0;
   for (int i = 0; i < wasm_count; i++) {
-    args_size_bytes += 1 << ElementSizeLog2Of(sig->GetParam(i));
+    args_size_bytes +=
+        RoundUpToMultipleOfPowOf2(1 << ElementSizeLog2Of(sig->GetParam(i)), 8);
   }
 
   // The return value is also passed via this buffer:
@@ -2980,7 +2981,13 @@ void WasmGraphBuilder::BuildWasmInterpreterEntry(
     *effect_ =
         graph()->NewNode(jsgraph()->machine()->Store(store_rep), arg_buffer,
                          Int32Constant(offset), param, *effect_, *control_);
-    offset += 1 << ElementSizeLog2Of(param_rep);
+
+    if (is_i64_as_two_params) {
+      offset += 1 << ElementSizeLog2Of(wasm::kWasmI32);
+    } else {
+      offset += RoundUpToMultipleOfPowOf2(1 << ElementSizeLog2Of(param_rep), 8);
+    }
+
     // TODO(clemensh): Respect endianess here. Might need to swap upper and
     // lower word.
     if (is_i64_as_two_params) {
@@ -2993,6 +3000,8 @@ void WasmGraphBuilder::BuildWasmInterpreterEntry(
                            Int32Constant(offset), param, *effect_, *control_);
       offset += 1 << ElementSizeLog2Of(wasm::kWasmI32);
     }
+
+    DCHECK(IsAligned(offset, 8));
   }
   DCHECK_EQ(param_count, param_index);
   DCHECK_EQ(args_size_bytes, offset);
@@ -3894,7 +3903,10 @@ Handle<Code> CompileWasmInterpreterEntry(Isolate* isolate, uint32_t func_index,
   Zone zone(isolate->allocator(), ZONE_NAME);
   Graph graph(&zone);
   CommonOperatorBuilder common(&zone);
-  MachineOperatorBuilder machine(&zone);
+  MachineOperatorBuilder machine(
+      &zone, MachineType::PointerRepresentation(),
+      InstructionSelector::SupportedMachineOperatorFlags(),
+      InstructionSelector::AlignmentRequirements());
   JSGraph jsgraph(isolate, &graph, &common, nullptr, nullptr, &machine);
 
   Node* control = nullptr;