From 47f9a49560cbf629ff36f3efb591d70b29471320 Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Tue, 18 May 2010 12:15:34 +0000
Subject: [PATCH] Simplify MCContext::(Next|Get)Instance

- Allocate MCLabels in the context so they don't leak.
- Avoid duplicated densemap lookup.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104020 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/MC/MCContext.cpp | 32 ++++++++------------------------
 1 file changed, 8 insertions(+), 24 deletions(-)

diff --git a/lib/MC/MCContext.cpp b/lib/MC/MCContext.cpp
index 5cc72e8e9f5..53ffc9409a6 100644
--- a/lib/MC/MCContext.cpp
+++ b/lib/MC/MCContext.cpp
@@ -73,33 +73,17 @@ MCSymbol *MCContext::CreateTempSymbol() {
 }
 
 unsigned MCContext::NextInstance(int64_t LocalLabelVal) {
-  unsigned Instance;
-  MCLabel *Label;
-  Label = Instances[LocalLabelVal];
-  if (Label) {
-    Instance = Label->incInstance();
-  }
-  else {
-    Instance = 1;
-    Label = new MCLabel(Instance);
-    Instances[LocalLabelVal] = Label;
-  }
-  return Instance;
+  MCLabel *&Label = Instances[LocalLabelVal];
+  if (!Label)
+    Label = new (*this) MCLabel(0);
+  return Label->incInstance();
 }
 
 unsigned MCContext::GetInstance(int64_t LocalLabelVal) {
-  int Instance;
-  MCLabel *Label;
-  Label = Instances[LocalLabelVal];
-  if (Label) {
-    Instance = Label->getInstance();
-  }
-  else {
-    Instance = 0;
-    Label = new MCLabel(Instance);
-    Instances[LocalLabelVal] = Label;
-  }
-  return Instance;
+  MCLabel *&Label = Instances[LocalLabelVal];
+  if (!Label)
+    Label = new (*this) MCLabel(0);
+  return Label->getInstance();
 }
 
 MCSymbol *MCContext::CreateDirectionalLocalSymbol(int64_t LocalLabelVal) {
-- 
2.34.1