Build stack frames for stubs only when needed.

src/compiler/arm64/code-generator-arm64.cc

Index: src/compiler/arm64/code-generator-arm64.cc
diff --git a/src/compiler/arm64/code-generator-arm64.cc b/src/compiler/arm64/code-generator-arm64.cc
index 8281b7b13cca6de6494156f7ae850044800a48d4..f80161678630278ecd01c2d224999f529f177c65 100644
--- a/src/compiler/arm64/code-generator-arm64.cc
+++ b/src/compiler/arm64/code-generator-arm64.cc
@@ -887,6 +887,7 @@ static int AlignedStackSlots(int stack_slots) {
 
 void CodeGenerator::AssemblePrologue() {
   CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
+  int stack_slots = frame()->GetSpillSlotCount();
   if (descriptor->kind() == CallDescriptor::kCallAddress) {
     __ SetStackPointer(csp);
     __ Push(lr, fp);
@@ -900,13 +901,12 @@ void CodeGenerator::AssemblePrologue() {
     __ Prologue(info->IsCodePreAgingActive());
     frame()->SetRegisterSaveAreaSize(
         StandardFrameConstants::kFixedFrameSizeFromFp);
-  } else {
+  } else if (stack_slots > 0) {
     __ SetStackPointer(jssp);
     __ StubPrologue();
     frame()->SetRegisterSaveAreaSize(
         StandardFrameConstants::kFixedFrameSizeFromFp);
   }
-  int stack_slots = frame()->GetSpillSlotCount();
 
   if (info()->is_osr()) {
     // TurboFan OSR-compiled functions cannot be entered directly.
@@ -934,10 +934,10 @@ void CodeGenerator::AssemblePrologue() {
 
 void CodeGenerator::AssembleReturn() {
   CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
+  int stack_slots = frame()->GetSpillSlotCount();
   if (descriptor->kind() == CallDescriptor::kCallAddress) {
     if (frame()->GetRegisterSaveAreaSize() > 0) {
       // Remove this frame's spill slots first.
-      int stack_slots = frame()->GetSpillSlotCount();
       if (stack_slots > 0) {
         __ Add(csp, csp, AlignedStackSlots(stack_slots) * kPointerSize);
       }
@@ -948,7 +948,7 @@ void CodeGenerator::AssembleReturn() {
     __ Mov(csp, fp);
     __ Pop(fp, lr);
     __ Ret();
-  } else {
+  } else if (descriptor->IsJSFunctionCall() || stack_slots > 0) {
     __ Mov(jssp, fp);
     __ Pop(fp, lr);
     int pop_count = descriptor->IsJSFunctionCall()
@@ -956,6 +956,8 @@ void CodeGenerator::AssembleReturn() {
                         : 0;
     __ Drop(pop_count);
     __ Ret();
+  } else {
+    __ Ret();
   }
 }