[turbofan] Add TruncateFloat32ToUint32 operator to Turbofan.

src/compiler/x87/instruction-selector-x87.cc

Index: src/compiler/x87/instruction-selector-x87.cc
diff --git a/src/compiler/x87/instruction-selector-x87.cc b/src/compiler/x87/instruction-selector-x87.cc
index 60d4c20b1136901039f13ba31f3ec028e6326319..15e66abde71697735284ccd34e8028a739e71116 100644
--- a/src/compiler/x87/instruction-selector-x87.cc
+++ b/src/compiler/x87/instruction-selector-x87.cc
@@ -682,6 +682,11 @@ void InstructionSelector::VisitTruncateFloat32ToInt32(Node* node) {
 }
 
 
+void InstructionSelector::VisitTruncateFloat32ToUint32(Node* node) {
+  UNIMPLEMENTED();
+}
+
+
 void InstructionSelector::VisitChangeFloat64ToInt32(Node* node) {
   X87OperandGenerator g(this);
   Emit(kX87Float64ToInt32, g.DefineAsRegister(node), g.Use(node->InputAt(0)));