PPC: [turbofan] Add TruncationMode for TruncateFloat64ToInt32.

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 e9e6a758ec35744959557ef42ac4f6e02c47356c..0fe2acb369bbec610c182371f255cb1658f770f6 100644
--- a/src/compiler/ppc/instruction-selector-ppc.cc
+++ b/src/compiler/ppc/instruction-selector-ppc.cc
@@ -874,26 +874,31 @@ void InstructionSelector::VisitChangeInt32ToInt64(Node* node) {
 
 void InstructionSelector::VisitChangeUint32ToUint64(Node* node) {
   // TODO(mbrandy): inspect input to see if nop is appropriate.
-  PPCOperandGenerator g(this);
-  Emit(kPPC_Uint32ToUint64, g.DefineAsRegister(node),
-       g.UseRegister(node->InputAt(0)));
+  VisitRR(this, kPPC_Uint32ToUint64, node);
 }
 #endif
 
 
 void InstructionSelector::VisitTruncateFloat64ToFloat32(Node* node) {
-  PPCOperandGenerator g(this);
-  Emit(kPPC_DoubleToFloat32, g.DefineAsRegister(node),
-       g.UseRegister(node->InputAt(0)));
+  VisitRR(this, kPPC_DoubleToFloat32, node);
+}
+
+
+void InstructionSelector::VisitTruncateFloat64ToInt32(Node* node) {
+  switch (TruncationModeOf(node->op())) {
+    case TruncationMode::kJavaScript:
+      return VisitRR(this, kArchTruncateDoubleToI, node);
+    case TruncationMode::kRoundToZero:
+      return VisitRR(this, kPPC_DoubleToInt32, node);
+  }
+  UNREACHABLE();
 }
 
 
 #if V8_TARGET_ARCH_PPC64
 void InstructionSelector::VisitTruncateInt64ToInt32(Node* node) {
-  PPCOperandGenerator g(this);
   // TODO(mbrandy): inspect input to see if nop is appropriate.
-  Emit(kPPC_Int64ToInt32, g.DefineAsRegister(node),
-       g.UseRegister(node->InputAt(0)));
+  VisitRR(this, kPPC_Int64ToInt32, node);
 }
 #endif