PPC: [ic] [stubs] Don't use Code::flags in megamorphic stub cache hash computations.

src/ic/ppc/stub-cache-ppc.cc

Index: src/ic/ppc/stub-cache-ppc.cc
diff --git a/src/ic/ppc/stub-cache-ppc.cc b/src/ic/ppc/stub-cache-ppc.cc
index 689868e2ba2a373d63b7cbbd40bb94dcd65b0c79..3dad306f1185a172cd4fdb46f41cf26876ff9b06 100644
--- a/src/ic/ppc/stub-cache-ppc.cc
+++ b/src/ic/ppc/stub-cache-ppc.cc
@@ -142,7 +142,7 @@ void StubCache::GenerateProbe(MacroAssembler* masm, Register receiver,
   __ lwz(scratch, FieldMemOperand(name, Name::kHashFieldOffset));
   __ LoadP(ip, FieldMemOperand(receiver, HeapObject::kMapOffset));
   __ add(scratch, scratch, ip);
-  __ xori(scratch, scratch, Operand(kPrimaryMagic));
+  __ Xor(scratch, scratch, Operand(kPrimaryMagic));
   // The mask omits the last two bits because they are not part of the hash.
   __ andi(scratch, scratch,
           Operand((kPrimaryTableSize - 1) << kCacheIndexShift));
@@ -153,7 +153,7 @@ void StubCache::GenerateProbe(MacroAssembler* masm, Register receiver,
 
   // Primary miss: Compute hash for secondary probe.
   __ sub(scratch, scratch, name);
-  __ addi(scratch, scratch, Operand(kSecondaryMagic));
+  __ Add(scratch, scratch, kSecondaryMagic, r0);
   __ andi(scratch, scratch,
           Operand((kSecondaryTableSize - 1) << kCacheIndexShift));