[turbofan] Add support for TypeGuard to escape analysis.

R=mstarzinger@chromium.org

Review-Url: https://codereview.chromium.org/2427583002
Cr-Commit-Position: refs/heads/master@{#40360}

src/compiler/escape-analysis.cc

@@ -798,6 +798,7 @@ bool EscapeStatusAnalysis::CheckUsesForEscape(Node* uses, Node* rep,
       case IrOpcode::kStringEqual:
       case IrOpcode::kStringLessThan:
       case IrOpcode::kStringLessThanOrEqual:
+      case IrOpcode::kTypeGuard:
       case IrOpcode::kPlainPrimitiveToNumber:
       case IrOpcode::kPlainPrimitiveToWord32:
       case IrOpcode::kPlainPrimitiveToFloat64: