don't new[] an empty array when an AttributeList has
zero expression arguments. This eliminates 2579 1-byte
mallocs when parsing Cocoa.h.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65022 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/AttributeList.cpp b/lib/Parse/AttributeList.cpp
index 3d9d2b4..6b58a00 100644
--- a/lib/Parse/AttributeList.cpp
+++ b/lib/Parse/AttributeList.cpp
@@ -16,13 +16,17 @@
AttributeList::AttributeList(IdentifierInfo *aName, SourceLocation aLoc,
IdentifierInfo *pName, SourceLocation pLoc,
- Action::ExprTy **elist, unsigned numargs,
+ Action::ExprTy **ExprList, unsigned numArgs,
AttributeList *n)
: AttrName(aName), AttrLoc(aLoc), ParmName(pName), ParmLoc(pLoc),
- NumArgs(numargs), Next(n) {
- Args = new Action::ExprTy*[numargs];
- for (unsigned i = 0; i != numargs; ++i)
- Args[i] = elist[i];
+ NumArgs(numArgs), Next(n) {
+
+ if (numArgs == 0)
+ Args = 0;
+ else {
+ Args = new Action::ExprTy*[numArgs];
+ memcpy(Args, ExprList, numArgs*sizeof(Args[0]));
+ }
}
AttributeList::~AttributeList() {