[turbofan] Implemented the TruncateFloat32ToInt64 TurboFan operator.

src/compiler/ppc/instruction-selector-ppc.cc

Index: src/compiler/ppc/instruction-selector-ppc.cc
diff --git a/src/compiler/ppc/instruction-selector-ppc.cc b/src/compiler/ppc/instruction-selector-ppc.cc
index ff5eff094c9a0c66f5c40ea8e3e0de55e60033a7..337e6167d6acd3ff5ec537f4cb43c398afbfc62c 100644
--- a/src/compiler/ppc/instruction-selector-ppc.cc
+++ b/src/compiler/ppc/instruction-selector-ppc.cc
@@ -927,6 +927,11 @@ void InstructionSelector::VisitChangeFloat64ToUint32(Node* node) {
 
 
 #if V8_TARGET_ARCH_PPC64
+void InstructionSelector::VisitTruncateFloat32ToInt64(Node* node) {
+  UNIMPLEMENTED();
+}
+
+
 void InstructionSelector::VisitTruncateFloat64ToInt64(Node* node) {
   VisitRR(this, kPPC_DoubleToInt64, node);
 }