Unify JSEntryStub and JSConstructEntryStub, and some more code stub cleanups.

src/arm64/code-stubs-arm64.cc

Index: src/arm64/code-stubs-arm64.cc
diff --git a/src/arm64/code-stubs-arm64.cc b/src/arm64/code-stubs-arm64.cc
index b5eef87f818b82e2692b0231a79bd94a3a974565..88a40ee170d1b054ba5814a0809bab3efead0b4c 100644
--- a/src/arm64/code-stubs-arm64.cc
+++ b/src/arm64/code-stubs-arm64.cc
@@ -1256,7 +1256,7 @@ void CEntryStub::Generate(MacroAssembler* masm) {
 //   x4: argv.
 // Output:
 //   x0: result.
-void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
+void JSEntryStub::Generate(MacroAssembler* masm) {
   DCHECK(jssp.Is(__ StackPointer()));
   Register code_entry = x0;
 
@@ -1287,7 +1287,7 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ Fmov(fp_zero, 0.0);
 
   // Build an entry frame (see layout below).
-  int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY;
+  int marker = type();
   int64_t bad_frame_pointer = -1L;  // Bad frame pointer to fail if it is used.
   __ Mov(x13, bad_frame_pointer);
   __ Mov(x12, Smi::FromInt(marker));
@@ -1372,8 +1372,9 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   // x2: receiver.
   // x3: argc.
   // x4: argv.
-  ExternalReference entry(is_construct ? Builtins::kJSConstructEntryTrampoline
-                                       : Builtins::kJSEntryTrampoline,
+  ExternalReference entry(type() == StackFrame::ENTRY_CONSTRUCT
+                              ? Builtins::kJSConstructEntryTrampoline
+                              : Builtins::kJSEntryTrampoline,
                           isolate());
   __ Mov(x10, entry);