PPC: Fix '[strong] Disallow implicit conversions for comparison'

src/ppc/code-stubs-ppc.cc

Index: src/ppc/code-stubs-ppc.cc
diff --git a/src/ppc/code-stubs-ppc.cc b/src/ppc/code-stubs-ppc.cc
index 088c5eed58371009ac9c664da38c2393e4813cc1..16f38a2fc116568a9f17d629bff44097e1f13839 100644
--- a/src/ppc/code-stubs-ppc.cc
+++ b/src/ppc/code-stubs-ppc.cc
@@ -271,7 +271,7 @@ static void EmitIdenticalObjectComparison(MacroAssembler* masm, Label* slow,
       // we need to throw a TypeError. Smis have already been ruled out.
       __ cmpi(r7, Operand(HEAP_NUMBER_TYPE));
       __ beq(&return_equal);
-      __ andi(r7, r7, Operand(kIsNotStringMask));
+      __ andi(r0, r7, Operand(kIsNotStringMask));
       __ bne(slow, cr0);
     }
   } else {
@@ -288,7 +288,7 @@ static void EmitIdenticalObjectComparison(MacroAssembler* masm, Label* slow,
         // Call the runtime on anything that is converted in the semantics,
         // since we need to throw a TypeError. Smis and heap numbers have
         // already been ruled out.
-        __ andi(r7, r7, Operand(kIsNotStringMask));
+        __ andi(r0, r7, Operand(kIsNotStringMask));
         __ bne(slow, cr0);
       }
       // Normally here we fall through to return_equal, but undefined is