PPC/s390: Don't dereference handles in (macro-)assembler functions used by TF.

Port 9b3174b2

Original Commit Message:

    Remove all IsHeapObject/IsSmi checks from assembler and also from
    the macro-assembler functions that Turbofan code generation uses.

    Note for porters: In case it's unclear which macro-assembler
    functions need to be modified, it may be best to wait until I
    split MacroAssembler in a followup-CL, which will make that clear.

R=neis@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:6048
LOG=N

Change-Id: Iae7d74709930a25246ab919a65dfecf1175945f7
Reviewed-on: https://chromium-review.googlesource.com/562656Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Jaideep Bajwa <bjaideep@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#46458}

src/ppc/macro-assembler-ppc.cc

@@ -183,6 +183,10 @@ void MacroAssembler::Push(Handle<Object> handle) {
   push(r0);
 }
 
+void MacroAssembler::PushObject(Handle<Object> handle) {
+  mov(r0, Operand(handle));
+  push(r0);
+}
 
 void MacroAssembler::Move(Register dst, Handle<Object> value) {
   mov(dst, Operand(value));

src/ppc/macro-assembler-ppc.h

@@ -276,6 +276,7 @@ class MacroAssembler : public Assembler {
   // Push a handle.
   void Push(Handle<Object> handle);
   void Push(Smi* smi) { Push(Handle<Smi>(smi, isolate())); }
+  void PushObject(Handle<Object> handle);
 
   // Push two registers.  Pushes leftmost register first (to highest address).
   void Push(Register src1, Register src2) {

src/s390/macro-assembler-s390.cc

@@ -169,6 +169,11 @@ void MacroAssembler::Push(Handle<Object> handle) {
   push(r0);
 }
 
+void MacroAssembler::PushObject(Handle<Object> handle) {
+  mov(r0, Operand(handle));
+  push(r0);
+}
+
 void MacroAssembler::Move(Register dst, Handle<Object> value) {
   mov(dst, Operand(value));
 }

src/s390/macro-assembler-s390.h

@@ -612,6 +612,7 @@ class MacroAssembler : public Assembler {
   // Push a handle.
   void Push(Handle<Object> handle);
   void Push(Smi* smi) { Push(Handle<Smi>(smi, isolate())); }
+  void PushObject(Handle<Object> handle);
 
   // Push two registers.  Pushes leftmost register first (to highest address).
   void Push(Register src1, Register src2) {