From cbba4b2059ee8c68f0e26a8783722d12b0225e80 Mon Sep 17 00:00:00 2001
From: Vedant Kumar <vsk@apple.com>
Date: Mon, 1 Aug 2016 16:37:37 +0000
Subject: [PATCH] [lldb][tsan] Perform one map lookup instead of two (NFC)

Differential Revision: https://reviews.llvm.org/D22983

llvm-svn: 277350
---
 .../ThreadSanitizer/ThreadSanitizerRuntime.cpp               | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lldb/source/Plugins/InstrumentationRuntime/ThreadSanitizer/ThreadSanitizerRuntime.cpp b/lldb/source/Plugins/InstrumentationRuntime/ThreadSanitizer/ThreadSanitizerRuntime.cpp
index 1d9fab31a0d4..a08c26fa4837 100644
--- a/lldb/source/Plugins/InstrumentationRuntime/ThreadSanitizer/ThreadSanitizerRuntime.cpp
+++ b/lldb/source/Plugins/InstrumentationRuntime/ThreadSanitizer/ThreadSanitizerRuntime.cpp
@@ -335,10 +335,11 @@ GetRenumberedThreadIds(ProcessSP process_sp, ValueObjectSP data, std::map<uint64
 }
 
 static user_id_t Renumber(uint64_t id, std::map<uint64_t, user_id_t> &thread_id_map) {
-    if (! thread_id_map.count(id))
+    auto IT = thread_id_map.find(id);
+    if (IT == thread_id_map.end())
         return 0;
     
-    return thread_id_map[id];
+    return IT->second;
 }
 
 StructuredData::ObjectSP