[turbofan] Change TruncateFloat32ToUint64 to TryTruncateFloat32ToUint64.

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 4d793e7e4422a36317328aacce0f80d0d06336a8..2fb7b8c7286c29072cf065504b277bab16187ca8 100644
--- a/src/compiler/mips64/instruction-selector-mips64.cc
+++ b/src/compiler/mips64/instruction-selector-mips64.cc
@@ -871,8 +871,19 @@ void InstructionSelector::VisitTryTruncateFloat64ToInt64(Node* node) {
 }
 
 
-void InstructionSelector::VisitTruncateFloat32ToUint64(Node* node) {
-  VisitRR(this, kMips64TruncUlS, node);
+void InstructionSelector::VisitTryTruncateFloat32ToUint64(Node* node) {
+  Mips64OperandGenerator g(this);
+  InstructionOperand inputs[] = {g.UseRegister(node->InputAt(0))};
+  InstructionOperand outputs[2];
+  size_t output_count = 0;
+  outputs[output_count++] = g.DefineAsRegister(node);
+
+  Node* success_output = NodeProperties::FindProjection(node, 1);
+  if (success_output) {
+    outputs[output_count++] = g.DefineAsRegister(success_output);
+  }
+
+  Emit(kMips64TruncUlS, output_count, outputs, 1, inputs);
 }