PPC: Switch CallConstructStub to take new.target in register.

src/ppc/code-stubs-ppc.cc

Index: src/ppc/code-stubs-ppc.cc
diff --git a/src/ppc/code-stubs-ppc.cc b/src/ppc/code-stubs-ppc.cc
index e7c11e7bc621cf2c9e363797f81505f56e405a3d..61e510d03c784514d1a18da036f02329ce2bf13c 100644
--- a/src/ppc/code-stubs-ppc.cc
+++ b/src/ppc/code-stubs-ppc.cc
@@ -2788,18 +2788,25 @@ void CallConstructStub::Generate(MacroAssembler* masm) {
   // r3 : number of arguments
   // r4 : the function to call
   // r5 : feedback vector
-  // r6 : (only if r5 is not the megamorphic symbol) slot in feedback
-  //      vector (Smi)
+  // r6 : slot in feedback vector (Smi, for RecordCallTarget)
+  // r7 : original constructor (for IsSuperConstructorCall)
   Label slow, non_function_call;
 
   // Check that the function is not a smi.
   __ JumpIfSmi(r4, &non_function_call);
   // Check that the function is a JSFunction.
-  __ CompareObjectType(r4, r7, r7, JS_FUNCTION_TYPE);
+  __ CompareObjectType(r4, r8, r8, JS_FUNCTION_TYPE);
   __ bne(&slow);
 
   if (RecordCallTarget()) {
+    if (IsSuperConstructorCall()) {
+      __ push(r7);
+    }
+    // TODO(mstarzinger): Consider tweaking target recording to avoid push/pop.
     GenerateRecordCallTarget(masm);
+    if (IsSuperConstructorCall()) {
+      __ pop(r7);
+    }
 
     __ SmiToPtrArrayOffset(r8, r6);
     __ add(r8, r5, r8);
@@ -2829,9 +2836,7 @@ void CallConstructStub::Generate(MacroAssembler* masm) {
 
   // Pass function as original constructor.
   if (IsSuperConstructorCall()) {
-    __ ShiftLeftImm(r7, r3, Operand(kPointerSizeLog2));
-    __ addi(r7, r7, Operand(kPointerSize));
-    __ LoadPX(r6, MemOperand(sp, r7));
+    __ mr(r6, r7);
   } else {
     __ mr(r6, r4);
   }
@@ -2846,11 +2851,11 @@ void CallConstructStub::Generate(MacroAssembler* masm) {
 
   // r3: number of arguments
   // r4: called object
-  // r7: object type
+  // r8: object type
   Label do_call;
   __ bind(&slow);
   STATIC_ASSERT(JS_FUNCTION_PROXY_TYPE < 0xffffu);
-  __ cmpi(r7, Operand(JS_FUNCTION_PROXY_TYPE));
+  __ cmpi(r8, Operand(JS_FUNCTION_PROXY_TYPE));
   __ bne(&non_function_call);
   __ GetBuiltinFunction(r4, Builtins::CALL_FUNCTION_PROXY_AS_CONSTRUCTOR);
   __ b(&do_call);