[wasm] remove faux code objects

src/compiler/ia32/code-generator-ia32.cc

Index: src/compiler/ia32/code-generator-ia32.cc
diff --git a/src/compiler/ia32/code-generator-ia32.cc b/src/compiler/ia32/code-generator-ia32.cc
index c3964e7f4d6fb6b8802993f67e25f349ad552511..8e0b0b672faf52608b1f0c364d3be786365a15f7 100644
--- a/src/compiler/ia32/code-generator-ia32.cc
+++ b/src/compiler/ia32/code-generator-ia32.cc
@@ -437,8 +437,13 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
     case kArchCallCodeObject: {
       EnsureSpaceForLazyDeopt();
       if (HasImmediateInput(instr, 0)) {
-        Handle<Code> code = Handle<Code>::cast(i.InputHeapObject(0));
-        __ call(code, RelocInfo::CODE_TARGET);
+        Constant callee_operand = i.ToConstant(instr->InputAt(0));
+        if (callee_operand.type() == Constant::Type::kInt32) {
+          __ wasm_direct_call(callee_operand.ToInt32());
+        } else {
+          Handle<Code> code = Handle<Code>::cast(i.InputHeapObject(0));
+          __ call(code, RelocInfo::CODE_TARGET);
+        }
       } else {
         Register reg = i.InputRegister(0);
         __ add(reg, Immediate(Code::kHeaderSize - kHeapObjectTag));