From 6e2040c9551422307920a708773e0099222470a6 Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Fri, 23 Apr 2021 09:20:52 -0400
Subject: [PATCH 1/3] lm: Resolve -Wextra-semi warning

Resolves a trivial warning with clang.
---
 src/core/hle/service/lm/lm.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/hle/service/lm/lm.cpp b/src/core/hle/service/lm/lm.cpp
index 7d7542fc2e..70f5272afd 100644
--- a/src/core/hle/service/lm/lm.cpp
+++ b/src/core/hle/service/lm/lm.cpp
@@ -46,7 +46,7 @@ struct hash<Service::LM::LogPacketHeaderEntry> {
         boost::hash_combine(seed, k.severity);
         boost::hash_combine(seed, k.verbosity);
         return seed;
-    };
+    }
 };
 } // namespace std
 

From 5ba49f188bf39cdfc71a6b78d7d846b4b0725dc3 Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Fri, 23 Apr 2021 09:24:19 -0400
Subject: [PATCH 2/3] lm: Prevent redundant map lookups in Log()

We can perform the lookup and then do the contains check by checking the
end iterator. The benefit of this is that if we *do* find an entry, then
we aren't hashing into the map again to find it.

We can also get rid of an unused std::vector temporary while we're at
it.
---
 src/core/hle/service/lm/lm.cpp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/core/hle/service/lm/lm.cpp b/src/core/hle/service/lm/lm.cpp
index 70f5272afd..b311ad300d 100644
--- a/src/core/hle/service/lm/lm.cpp
+++ b/src/core/hle/service/lm/lm.cpp
@@ -95,7 +95,7 @@ private:
         std::memcpy(&header, data.data(), sizeof(LogPacketHeader));
         offset += sizeof(LogPacketHeader);
 
-        LogPacketHeaderEntry entry{
+        const LogPacketHeaderEntry entry{
             .pid = header.pid,
             .tid = header.tid,
             .severity = header.severity,
@@ -107,14 +107,15 @@ private:
             std::memcpy(tmp.data(), data.data() + offset, tmp.size());
             entries[entry] = std::move(tmp);
         } else {
+            const auto entry_iter = entries.find(entry);
+
             // Append to existing entry
-            if (!entries.contains(entry)) {
+            if (entry_iter == entries.cend()) {
                 LOG_ERROR(Service_LM, "Log entry does not exist!");
                 return;
             }
-            std::vector<u8> tmp(data.size() - sizeof(LogPacketHeader));
 
-            auto& existing_entry = entries[entry];
+            auto& existing_entry = entry_iter->second;
             const auto base = existing_entry.size();
             existing_entry.resize(base + (data.size() - sizeof(LogPacketHeader)));
             std::memcpy(existing_entry.data() + base, data.data() + offset,

From 29cd40bded0ee7885fdef9f0a2fbb4e6ad297561 Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Fri, 23 Apr 2021 09:27:15 -0400
Subject: [PATCH 3/3] lm: Make use of insert_or_assign() in Log()

Avoids unnecessary default construction of an entry in cases where no
entry exists before overwriting the created entry.
---
 src/core/hle/service/lm/lm.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/hle/service/lm/lm.cpp b/src/core/hle/service/lm/lm.cpp
index b311ad300d..9bcf8870db 100644
--- a/src/core/hle/service/lm/lm.cpp
+++ b/src/core/hle/service/lm/lm.cpp
@@ -105,7 +105,7 @@ private:
         if (True(header.flags & LogPacketFlags::Head)) {
             std::vector<u8> tmp(data.size() - sizeof(LogPacketHeader));
             std::memcpy(tmp.data(), data.data() + offset, tmp.size());
-            entries[entry] = std::move(tmp);
+            entries.insert_or_assign(entry, std::move(tmp));
         } else {
             const auto entry_iter = entries.find(entry);