[arm] Fix pushing of stale register in CallConstructStub.

src/arm/code-stubs-arm.cc

Index: src/arm/code-stubs-arm.cc
diff --git a/src/arm/code-stubs-arm.cc b/src/arm/code-stubs-arm.cc
index a3360ea2165ee332757b9a8d926c7c416cc3198f..c1ead67482fd12a3ff1fb3bcfc7732cc77c68125 100644
--- a/src/arm/code-stubs-arm.cc
+++ b/src/arm/code-stubs-arm.cc
@@ -2384,28 +2384,33 @@ void RegExpExecStub::Generate(MacroAssembler* masm) {
 }
 
 
-static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub) {
+static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub,
+                                       bool is_super) {
   // r0 : number of arguments to the construct function
   // r1 : the function to call
   // r2 : feedback vector
   // r3 : slot in feedback vector (Smi)
-  // r4 : original constructor
+  // r4 : original constructor (for IsSuperConstructorCall)
   FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
 
   // Number-of-arguments register must be smi-tagged to call out.
   __ SmiTag(r0);
   __ Push(r3, r2, r1, r0);
-  __ Push(r4);
+  if (is_super) {
+    __ Push(r4);
+  }
 
   __ CallStub(stub);
 
-  __ Pop(r4);
+  if (is_super) {
+    __ Pop(r4);
+  }
   __ Pop(r3, r2, r1, r0);
   __ SmiUntag(r0);
 }
 
 
-static void GenerateRecordCallTarget(MacroAssembler* masm) {
+static void GenerateRecordCallTarget(MacroAssembler* masm, bool is_super) {
   // Cache the called function in a feedback vector slot.  Cache states
   // are uninitialized, monomorphic (indicated by a JSFunction), and
   // megamorphic.
@@ -2413,7 +2418,7 @@ static void GenerateRecordCallTarget(MacroAssembler* masm) {
   // r1 : the function to call
   // r2 : feedback vector
   // r3 : slot in feedback vector (Smi)
-  // r4 : original constructor
+  // r4 : original constructor (for IsSuperConstructorCall)
   Label initialize, done, miss, megamorphic, not_array_function;
 
   DCHECK_EQ(*TypeFeedbackVector::MegamorphicSentinel(masm->isolate()),
@@ -2488,14 +2493,14 @@ static void GenerateRecordCallTarget(MacroAssembler* masm) {
     // Create an AllocationSite if we don't already have it, store it in the
     // slot.
     CreateAllocationSiteStub create_stub(masm->isolate());
-    CallStubInRecordCallTarget(masm, &create_stub);
+    CallStubInRecordCallTarget(masm, &create_stub, is_super);
     __ b(&done);
 
     __ bind(&not_array_function);
   }
 
   CreateWeakCellStub create_stub(masm->isolate());
-  CallStubInRecordCallTarget(masm, &create_stub);
+  CallStubInRecordCallTarget(masm, &create_stub, is_super);
   __ bind(&done);
 }
 
@@ -2628,7 +2633,7 @@ void CallConstructStub::Generate(MacroAssembler* masm) {
   __ b(ne, &slow);
 
   if (RecordCallTarget()) {
-    GenerateRecordCallTarget(masm);
+    GenerateRecordCallTarget(masm, IsSuperConstructorCall());
 
     __ add(r5, r2, Operand::PointerOffsetFromSmiKey(r3));
     if (FLAG_pretenuring_call_new) {