[llvm] r207331 - Mark the growing path in SmallVector::push_back as cold.

[Benjamin Kramer]

Author: d0k
Date: Sat Apr 26 15:10:49 2014
New Revision: 207331

URL: http://llvm.org/viewvc/llvm-project?rev=207331&view=rev
Log:
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.

Modified:
    llvm/trunk/include/llvm/ADT/SmallVector.h

Modified: llvm/trunk/include/llvm/ADT/SmallVector.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/SmallVector.h?rev=207331&r1=207330&r2=207331&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/SmallVector.h (original)
+++ llvm/trunk/include/llvm/ADT/SmallVector.h Sat Apr 26 15:10:49 2014
@@ -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);