Reserve space in these vectors to prevent having to grow the array too
much. This gets us an addition 0.9% on 445.gobmk.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149952 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/VMCore/Constants.cpp b/lib/VMCore/Constants.cpp
index a2f3b3f..6dbc144 100644
--- a/lib/VMCore/Constants.cpp
+++ b/lib/VMCore/Constants.cpp
@@ -784,9 +784,10 @@
StructType *ConstantStruct::getTypeForElements(LLVMContext &Context,
ArrayRef<Constant*> V,
bool Packed) {
- SmallVector<Type*, 16> EltTypes;
- for (unsigned i = 0, e = V.size(); i != e; ++i)
- EltTypes.push_back(V[i]->getType());
+ unsigned VecSize = V.size();
+ SmallVector<Type*, 16> EltTypes(VecSize);
+ for (unsigned i = 0; i != VecSize; ++i)
+ EltTypes[i] = V[i]->getType();
return StructType::get(Context, EltTypes, Packed);
}
diff --git a/lib/VMCore/Type.cpp b/lib/VMCore/Type.cpp
index f5c88cc..14a5aae 100644
--- a/lib/VMCore/Type.cpp
+++ b/lib/VMCore/Type.cpp
@@ -440,11 +440,12 @@
StructType *StructType::get(LLVMContext &Context, ArrayRef<Type*> ETypes,
bool isPacked) {
// FIXME: std::vector is horribly inefficient for this probe.
- std::vector<Type*> Key;
- for (unsigned i = 0, e = ETypes.size(); i != e; ++i) {
+ unsigned ETypesSize = ETypes.size();
+ std::vector<Type*> Key(ETypesSize);
+ for (unsigned i = 0, e = ETypesSize; i != e; ++i) {
assert(isValidElementType(ETypes[i]) &&
"Invalid type for structure element!");
- Key.push_back(ETypes[i]);
+ Key[i] = ETypes[i];
}
if (isPacked)
Key.push_back(0);