PPC/s390: [stubs] Port CreateWeakCellStub to turbofan

Port 7f1fa30e

Original commit message:

    In the process also inline the stub into the appropriate interpreter bytecode
    handler and make sure that the context register is preserved in hand-written
    assembly code that calls the stub and expects the context register to be
    preserved.

R=danno@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=608675
LOG=N

Review-Url: https://codereview.chromium.org/2188483008
Cr-Commit-Position: refs/heads/master@{#38148}

src/ppc/code-stubs-ppc.cc

@@ -1707,9 +1707,11 @@ static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub) {
   // Number-of-arguments register must be smi-tagged to call out.
   __ SmiTag(r3);
   __ Push(r6, r5, r4, r3);
+  __ Push(cp);
 
   __ CallStub(stub);
 
+  __ Pop(cp);
   __ Pop(r6, r5, r4, r3);
   __ SmiUntag(r3);
 }
@@ -2022,9 +2024,9 @@ void CallICStub::Generate(MacroAssembler* masm) {
   {
     FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
     CreateWeakCellStub create_stub(masm->isolate());
-    __ Push(r4);
+    __ Push(cp, r4);
     __ CallStub(&create_stub);
-    __ Pop(r4);
+    __ Pop(cp, r4);
   }
 
   __ b(&call_function);

src/s390/code-stubs-s390.cc

@@ -1715,9 +1715,11 @@ static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub) {
   // Number-of-arguments register must be smi-tagged to call out.
   __ SmiTag(r2);
   __ Push(r5, r4, r3, r2);
+  __ Push(cp);
 
   __ CallStub(stub);
 
+  __ Pop(cp);
   __ Pop(r5, r4, r3, r2);
   __ SmiUntag(r2);
 }
@@ -2021,9 +2023,9 @@ void CallICStub::Generate(MacroAssembler* masm) {
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
     CreateWeakCellStub create_stub(masm->isolate());
-    __ Push(r3);
+    __ Push(cp, r3);
     __ CallStub(&create_stub);
-    __ Pop(r3);
+    __ Pop(cp, r3);
   }
 
   __ b(&call_function);