[turbofan] Add TruncateFloat32ToUint32 operator to Turbofan.

src/compiler/mips64/instruction-selector-mips64.cc

Index: src/compiler/mips64/instruction-selector-mips64.cc
diff --git a/src/compiler/mips64/instruction-selector-mips64.cc b/src/compiler/mips64/instruction-selector-mips64.cc
index 2997809b5d4b37b1f63aa86d589ae91b6452439b..76ae4e39aa1ae0aef62b7455fa17cfbe9bbfef65 100644
--- a/src/compiler/mips64/instruction-selector-mips64.cc
+++ b/src/compiler/mips64/instruction-selector-mips64.cc
@@ -822,6 +822,11 @@ void InstructionSelector::VisitTruncateFloat32ToInt32(Node* node) {
 }
 
 
+void InstructionSelector::VisitTruncateFloat32ToUint32(Node* node) {
+  UNIMPLEMENTED();
+}
+
+
 void InstructionSelector::VisitChangeFloat64ToInt32(Node* node) {
   Mips64OperandGenerator g(this);
   Node* value = node->InputAt(0);