[turbofan] Add the TruncateFloat32ToInt32 operator to turbofan.

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index 86868e59eee5292ef7ec821f98eb4d5b3575396f..4c97f12349a208c5f1f9f3083e7fd1e35ad820d7 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -956,6 +956,8 @@ void InstructionSelector::VisitNode(Node* node) {
       return MarkAsWord32(node), VisitChangeFloat64ToInt32(node);
     case IrOpcode::kChangeFloat64ToUint32:
       return MarkAsWord32(node), VisitChangeFloat64ToUint32(node);
+    case IrOpcode::kTruncateFloat32ToInt32:
+      return MarkAsWord32(node), VisitTruncateFloat32ToInt32(node);
     case IrOpcode::kTryTruncateFloat32ToInt64:
       return MarkAsWord64(node), VisitTryTruncateFloat32ToInt64(node);
     case IrOpcode::kTryTruncateFloat64ToInt64: