From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Sat, 26 Apr 2014 20:10:49 +0000 (+0000)
Subject: Mark the growing path in SmallVector::push_back as cold.
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=708d6805654d9296937d8f8751e660909c41912a

Mark the growing path in SmallVector::push_back as cold.

It's vital for performance that the cold path of push_back isn't inlined.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207331 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/ADT/SmallVector.h b/include/llvm/ADT/SmallVector.h
index 791d03c6491..df46f919118 100644
--- a/include/llvm/ADT/SmallVector.h
+++ b/include/llvm/ADT/SmallVector.h
@@ -223,14 +223,14 @@ protected:
 
 public:
   void push_back(const T &Elt) {
-    if (this->EndX >= this->CapacityX)
+    if (LLVM_UNLIKELY(this->EndX >= this->CapacityX))
       this->grow();
     ::new ((void*) this->end()) T(Elt);
     this->setEnd(this->end()+1);
   }
 
   void push_back(T &&Elt) {
-    if (this->EndX >= this->CapacityX)
+    if (LLVM_UNLIKELY(this->EndX >= this->CapacityX))
       this->grow();
     ::new ((void*) this->end()) T(::std::move(Elt));
     this->setEnd(this->end()+1);
@@ -327,7 +327,7 @@ protected:
   }
 public:
   void push_back(const T &Elt) {
-    if (this->EndX >= this->CapacityX)
+    if (LLVM_UNLIKELY(this->EndX >= this->CapacityX))
       this->grow();
     memcpy(this->end(), &Elt, sizeof(T));
     this->setEnd(this->end()+1);