PPC: Further leverage internal references.

Enable code dependent on the newly provided common code support for
encoded internal references.

	modified:   src/ppc/code-stubs-ppc.cc
	modified:   test/cctest/cctest.status

R=danno@chromium.org, svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/1008963002

Cr-Commit-Position: refs/heads/master@{#27204}

src/ppc/code-stubs-ppc.cc

@@ -1124,22 +1124,11 @@ 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.

test/cctest/cctest.status

@@ -412,8 +412,5 @@
   'test-api/Threading2': [SKIP],
   'test-api/ExternalArrays': [SKIP],
 
-  # will not pass until we agree/implement changes to serializce.cc
-  'test-serialize/SerializeInternalReference': [SKIP],
-
 }],  # 'arch == ppc64 and simulator_run == True'
 ]