[turbofan] Don't use the CompareIC in JSGenericLowering.

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 f6befb269a87220498a39c5ce7b5bb730f7620d0..c5ed7c518375274fd614bac49d4af2f19e59fecf 100644
--- a/src/ppc/code-stubs-ppc.cc
+++ b/src/ppc/code-stubs-ppc.cc
@@ -698,11 +698,19 @@ void CompareICStub::GenerateGeneric(MacroAssembler* masm) {
 
   __ bind(&slow);
 
-  __ Push(lhs, rhs);
-  // Figure out which native to call and setup the arguments.
   if (cc == eq) {
-    __ TailCallRuntime(strict() ? Runtime::kStrictEquals : Runtime::kEquals);
+    {
+      FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
+      __ Push(lhs, rhs);
+      __ CallRuntime(strict() ? Runtime::kStrictEqual : Runtime::kEqual);
+    }
+    // Turn true into 0 and false into some non-zero value.
+    STATIC_ASSERT(EQUAL == 0);
+    __ LoadRoot(r4, Heap::kTrueValueRootIndex);
+    __ sub(r3, r3, r4);
+    __ Ret();
   } else {
+    __ Push(lhs, rhs);
     int ncr;  // NaN compare result
     if (cc == lt || cc == le) {
       ncr = GREATER;