Encapsulate megamorphic load/tail-call in hydrogen

src/ic/arm64/stub-cache-arm64.cc

Index: src/ic/arm64/stub-cache-arm64.cc
diff --git a/src/ic/arm64/stub-cache-arm64.cc b/src/ic/arm64/stub-cache-arm64.cc
index f16ffafc072fa65deb12aa75f0b0250922e72995..4d31d4988272ca0aac98ea4c4e2e7656ae400a83 100644
--- a/src/ic/arm64/stub-cache-arm64.cc
+++ b/src/ic/arm64/stub-cache-arm64.cc
@@ -23,9 +23,10 @@ namespace internal {
 //
 // 'receiver', 'name' and 'offset' registers are preserved on miss.
 static void ProbeTable(Isolate* isolate, MacroAssembler* masm,
-                       Code::Flags flags, StubCache::Table table,
-                       Register receiver, Register name, Register offset,
-                       Register scratch, Register scratch2, Register scratch3) {
+                       Code::Flags flags, bool leave_frame,
+                       StubCache::Table table, Register receiver, Register name,
+                       Register offset, Register scratch, Register scratch2,
+                       Register scratch3) {
   // Some code below relies on the fact that the Entry struct contains
   // 3 pointers (name, code, map).
   STATIC_ASSERT(sizeof(StubCache::Entry) == (3 * kPointerSize));
@@ -78,6 +79,8 @@ static void ProbeTable(Isolate* isolate, MacroAssembler* masm,
   }
 #endif
 
+  if (leave_frame) __ LeaveFrame(StackFrame::INTERNAL);
+
   // Jump to the first instruction in the code stub.
   __ Add(scratch, scratch, Code::kHeaderSize - kHeapObjectTag);
   __ Br(scratch);
@@ -88,9 +91,9 @@ static void ProbeTable(Isolate* isolate, MacroAssembler* masm,
 
 
 void StubCache::GenerateProbe(MacroAssembler* masm, Code::Flags flags,
-                              Register receiver, Register name,
-                              Register scratch, Register extra, Register extra2,
-                              Register extra3) {
+                              bool leave_frame, Register receiver,
+                              Register name, Register scratch, Register extra,
+                              Register extra2, Register extra3) {
   Isolate* isolate = masm->isolate();
   Label miss;
 
@@ -122,8 +125,8 @@ void StubCache::GenerateProbe(MacroAssembler* masm, Code::Flags flags,
           CountTrailingZeros(kPrimaryTableSize, 64));
 
   // Probe the primary table.
-  ProbeTable(isolate, masm, flags, kPrimary, receiver, name, scratch, extra,
-             extra2, extra3);
+  ProbeTable(isolate, masm, flags, leave_frame, kPrimary, receiver, name,
+             scratch, extra, extra2, extra3);
 
   // Primary miss: Compute hash for secondary table.
   __ Sub(scratch, scratch, Operand(name, LSR, kCacheIndexShift));
@@ -131,8 +134,8 @@ void StubCache::GenerateProbe(MacroAssembler* masm, Code::Flags flags,
   __ And(scratch, scratch, kSecondaryTableSize - 1);
 
   // Probe the secondary table.
-  ProbeTable(isolate, masm, flags, kSecondary, receiver, name, scratch, extra,
-             extra2, extra3);
+  ProbeTable(isolate, masm, flags, leave_frame, kSecondary, receiver, name,
+             scratch, extra, extra2, extra3);
 
   // Cache miss: Fall-through and let caller handle the miss by
   // entering the runtime system.