[asmjs] Do constant folding for I32Asmjs(Div|Rem)S to avoid checks of constant divisors

test/cctest/wasm/wasm-run-utils.h

Index: test/cctest/wasm/wasm-run-utils.h
diff --git a/test/cctest/wasm/wasm-run-utils.h b/test/cctest/wasm/wasm-run-utils.h
index 4daf57c2cafd372b75d1581e459d820b673874db..d63586042adddbda5c43a1239b47fca7c7466516 100644
--- a/test/cctest/wasm/wasm-run-utils.h
+++ b/test/cctest/wasm/wasm-run-utils.h
@@ -95,6 +95,8 @@ class TestingModule : public ModuleEnv {
     if (interpreter_) delete interpreter_;
   }
 
+  void ChangeOriginToAsmjs() { origin = kAsmJsOrigin; }
+
   byte* AddMemory(uint32_t size) {
     CHECK_NULL(instance->mem_start);
     CHECK_EQ(0, instance->mem_size);