Contribution of PowerPC port (continuation of 422063005) - PPC dir update 2 - mark2

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 0226ffbf572e3710ee07e65fd40c86de0c540bc8..4042cc83e07d1d1e9412ea3fd6807f13457f8242 100644
--- a/src/ppc/code-stubs-ppc.cc
+++ b/src/ppc/code-stubs-ppc.cc
@@ -1070,22 +1070,11 @@ void CEntryStub::Generate(MacroAssembler* masm) {
   // know where the return address is. The CEntryStub is unmovable, so
   // we can store the address on the stack to be able to find it again and
   // we never have to restore it, because it will not change.
-  // Compute the return address in lr to return to after the jump below. Pc is
-  // already at '+ 8' from the current instruction but return is after three
-  // instructions so add another 4 to pc to get the return address.
-  {
-    Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm);
-    Label here;
-    __ b(&here, SetLK);
-    __ bind(&here);
-    __ mflr(r8);
-
-    // Constant used below is dependent on size of Call() macro instructions
-    __ addi(r0, r8, Operand(20));
-
-    __ StoreP(r0, MemOperand(sp, kStackFrameExtraParamSlot * kPointerSize));
-    __ Call(target);
-  }
+  Label after_call;
+  __ mov_label_addr(r0, &after_call);
+  __ StoreP(r0, MemOperand(sp, kStackFrameExtraParamSlot * kPointerSize));
+  __ Call(target);
+  __ bind(&after_call);
 
 #if !ABI_RETURNS_OBJECT_PAIRS_IN_REGS
   // If return value is on the stack, pop it to registers.
@@ -1593,6 +1582,7 @@ void LoadIndexedStringStub::Generate(MacroAssembler* masm) {
 
 
 void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
+  CHECK(!has_new_target());
   // The displacement is the offset of the last parameter (if any)
   // relative to the frame pointer.
   const int kDisplacement =
@@ -1653,6 +1643,8 @@ void ArgumentsAccessStub::GenerateNewSloppySlow(MacroAssembler* masm) {
   // sp[1] : receiver displacement
   // sp[2] : function
 
+  CHECK(!has_new_target());
+
   // Check if the calling frame is an arguments adaptor frame.
   Label runtime;
   __ LoadP(r6, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
@@ -1683,6 +1675,8 @@ void ArgumentsAccessStub::GenerateNewSloppyFast(MacroAssembler* masm) {
   //  r9 : allocated object (tagged)
   //  r11 : mapped parameter count (tagged)
 
+  CHECK(!has_new_target());
+
   __ LoadP(r4, MemOperand(sp, 0 * kPointerSize));
   // r4 = parameter count (tagged)
 
@@ -1965,6 +1959,10 @@ void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) {
   // Patch the arguments.length and the parameters pointer.
   __ bind(&adaptor_frame);
   __ LoadP(r4, MemOperand(r5, ArgumentsAdaptorFrameConstants::kLengthOffset));
+  if (has_new_target()) {
+    // Subtract 1 from smi-tagged arguments count.
+    __ SubSmiLiteral(r4, r4, Smi::FromInt(1), r0);
+  }
   __ StoreP(r4, MemOperand(sp, 0));
   __ SmiToPtrArrayOffset(r6, r4);
   __ add(r6, r5, r6);
@@ -2051,6 +2049,31 @@ void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) {
 }
 
 
+void RestParamAccessStub::GenerateNew(MacroAssembler* masm) {
+  // Stack layout on entry.
+  //  sp[0] : index of rest parameter
+  //  sp[4] : number of parameters
+  //  sp[8] : receiver displacement
+
+  Label runtime;
+  __ LoadP(r5, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
+  __ LoadP(r6, MemOperand(r5, StandardFrameConstants::kContextOffset));
+  __ CmpSmiLiteral(r6, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0);
+  __ bne(&runtime);
+
+  // Patch the arguments.length and the parameters pointer.
+  __ LoadP(r4, MemOperand(r5, ArgumentsAdaptorFrameConstants::kLengthOffset));
+  __ StoreP(r4, MemOperand(sp, 1 * kPointerSize));
+  __ SmiToPtrArrayOffset(r6, r4);
+  __ add(r6, r5, r6);
+  __ addi(r6, r6, Operand(StandardFrameConstants::kCallerSPOffset));
+  __ StoreP(r6, MemOperand(sp, 2 * kPointerSize));
+
+  __ bind(&runtime);
+  __ TailCallRuntime(Runtime::kNewRestParam, 3, 1);
+}
+
+
 void RegExpExecStub::Generate(MacroAssembler* masm) {
 // Just jump directly to runtime if native RegExp is not selected at compile
 // time or if regexp entry in generated code is turned off runtime switch or
@@ -2760,7 +2783,13 @@ void CallConstructStub::Generate(MacroAssembler* masm) {
   }
 
   // Pass function as original constructor.
-  __ mr(r6, r4);
+  if (IsSuperConstructorCall()) {
+    __ ShiftLeftImm(r7, r3, Operand(kPointerSizeLog2));
+    __ addi(r7, r7, Operand(kPointerSize));
+    __ LoadPX(r6, MemOperand(sp, r7));
+  } else {
+    __ mr(r6, r4);
+  }
 
   // Jump to the function-specific construct stub.
   Register jmp_reg = r7;