[turbofan] Properly lower NumberTan to Float64Tan.

src/compiler/simplified-lowering.cc

Index: src/compiler/simplified-lowering.cc
diff --git a/src/compiler/simplified-lowering.cc b/src/compiler/simplified-lowering.cc
index 50b220ba74a9f46f97af580c1add78954da24ab1..af24dca3dea25940da8d7d3671c6255ba40ee422 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -1539,7 +1539,8 @@ class RepresentationSelector {
       case IrOpcode::kNumberLog2:
       case IrOpcode::kNumberLog10:
       case IrOpcode::kNumberCbrt:
-      case IrOpcode::kNumberSin: {
+      case IrOpcode::kNumberSin:
+      case IrOpcode::kNumberTan: {
         VisitUnop(node, UseInfo::TruncatingFloat64(),
                   MachineRepresentation::kFloat64);
         if (lower()) NodeProperties::ChangeOp(node, Float64Op(node));