PPC: Support for conditional return instruction.

src/ppc/macro-assembler-ppc.cc

Index: src/ppc/macro-assembler-ppc.cc
diff --git a/src/ppc/macro-assembler-ppc.cc b/src/ppc/macro-assembler-ppc.cc
index 3c80610b10ad684f8a6bc950915208c549ce498b..976290baa2b5191bf350213b5d021addd91e942c 100644
--- a/src/ppc/macro-assembler-ppc.cc
+++ b/src/ppc/macro-assembler-ppc.cc
@@ -176,26 +176,13 @@ void MacroAssembler::Call(Handle<Code> code, RelocInfo::Mode rmode,
 }
 
 
-void MacroAssembler::Ret(Condition cond) {
-  DCHECK(cond == al);
-  blr();
-}
-
-
-void MacroAssembler::Drop(int count, Condition cond) {
-  DCHECK(cond == al);
+void MacroAssembler::Drop(int count) {
   if (count > 0) {
     Add(sp, sp, count * kPointerSize, r0);
   }
 }
 
 
-void MacroAssembler::Ret(int drop, Condition cond) {
-  Drop(drop, cond);
-  Ret(cond);
-}
-
-
 void MacroAssembler::Call(Label* target) { b(target, SetLK); }
 
 
@@ -497,7 +484,7 @@ void MacroAssembler::RememberedSetHelper(Register object,  // For debug tests.
     beq(&done, cr0);
   } else {
     DCHECK(and_then == kReturnAtEnd);
-    beq(&done, cr0);
+    Ret(eq, cr0);
   }
   mflr(r0);
   push(r0);