[liftoff] fix dcheck failure on Big Endian

Change-Id: I78c6203a6415cc6a94ff4bcefa4421f8eb54cc0e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704291Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72845}

src/wasm/baseline/liftoff-assembler.cc

@@ -55,8 +55,9 @@ class StackTransferRecipe {
         return {kConstant, kWasmI32, constant.to_i32()};
       }
       DCHECK_EQ(kWasmI64, constant.type());
-      DCHECK_EQ(constant.to_i32_unchecked(), constant.to_i64_unchecked());
-      return {kConstant, kWasmI64, constant.to_i32_unchecked()};
+      int32_t i32_const = static_cast<int32_t>(constant.to_i64());
+      DCHECK_EQ(constant.to_i64(), i32_const);
+      return {kConstant, kWasmI64, i32_const};
     }
     static RegisterLoad Stack(int32_t offset, ValueType type) {
       return {kStack, type, offset};