Add missing dereferenceable_or_null getters

Summary: Add missing dereferenceable_or_null getters required for
http://reviews.llvm.org/D9253 change. Separated from the D9253 review.

Patch by Artur Pilipenko!

Reviewers: sanjoy

Reviewed By: sanjoy

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D9499

llvm-svn: 236615

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/lib/IR/Attributes.cpp b/llvm/lib/IR/Attributes.cpp
index be5b74f59a2..7c9468cb158 100644
--- a/llvm/lib/IR/Attributes.cpp
+++ b/llvm/lib/IR/Attributes.cpp
@@ -532,6 +532,13 @@ uint64_t AttributeSetNode::getDereferenceableBytes() const {
   return 0;
 }
 
+uint64_t AttributeSetNode::getDereferenceableOrNullBytes() const {
+  for (iterator I = begin(), E = end(); I != E; ++I)
+    if (I->hasAttribute(Attribute::DereferenceableOrNull))
+      return I->getDereferenceableOrNullBytes();
+  return 0;
+}
+
 std::string AttributeSetNode::getAsString(bool InAttrGrp) const {
   std::string Str;
   for (iterator I = begin(), E = end(); I != E; ++I) {
@@ -957,6 +964,11 @@ uint64_t AttributeSet::getDereferenceableBytes(unsigned Index) const {
   return ASN ? ASN->getDereferenceableBytes() : 0;
 }
 
+uint64_t AttributeSet::getDereferenceableOrNullBytes(unsigned Index) const {
+  AttributeSetNode *ASN = getAttributes(Index);
+  return ASN ? ASN->getDereferenceableOrNullBytes() : 0;
+}
+
 std::string AttributeSet::getAsString(unsigned Index,
                                       bool InAttrGrp) const {
   AttributeSetNode *ASN = getAttributes(Index);