use smallvector instead of vector to make constant folding a bit more efficient

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33672 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp
index f09ff0e8e1b5b5f4832a6d070de980e86cb72251..cae743fee504e9802ed050a8cdecdc4be11b9a57 100644 (file)
--- a/lib/Transforms/Scalar/SCCP.cpp
+++ b/lib/Transforms/Scalar/SCCP.cpp
@@ -33,6 +33,7 @@
 #include "llvm/Support/CallSite.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/ADT/hash_map"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/STLExtras.h"
 #include <algorithm>
@@ -1093,7 +1094,7 @@ void SCCPSolver::visitCallSite(CallSite CS) {
     return;
   }
 
-  std::vector<Constant*> Operands;
+  SmallVector<Constant*, 8> Operands;
   Operands.reserve(I->getNumOperands()-1);
 
   for (CallSite::arg_iterator AI = CS.arg_begin(), E = CS.arg_end();
@@ -1109,7 +1110,7 @@ void SCCPSolver::visitCallSite(CallSite CS) {
     Operands.push_back(State.getConstant());
   }
 
-  if (Constant *C = ConstantFoldCall(F, Operands))
+  if (Constant *C = ConstantFoldCall(F, &Operands[0], Operands.size()))
     markConstant(IV, I, C);
   else
     markOverdefined(IV, I);