2 files changed, 11 insertions, 6 deletions
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index 1f8b50342c2..e29b225adea 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -660,10 +660,12 @@ void ModuleBitcodeWriter::writeAttributeTable() {
 
   SmallVector<uint64_t, 64> Record;
   for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
-    const AttributeList &A = Attrs[i];
-    for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i)
-      Record.push_back(
-          VE.getAttributeGroupID({A.getSlotIndex(i), A.getSlotAttributes(i)}));
+    AttributeList AL = Attrs[i];
+    for (unsigned i = AL.index_begin(), e = AL.index_end(); i != e; ++i) {
+      AttributeSet AS = AL.getAttributes(i);
+      if (AS.hasAttributes())
+        Record.push_back(VE.getAttributeGroupID({i, AS}));
+    }
 
     Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
     Record.clear();
diff --git a/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp b/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
index fd76400331d..bb626baabd1 100644
--- a/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
+++ b/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
@@ -902,8 +902,11 @@ void ValueEnumerator::EnumerateAttributes(AttributeList PAL) {
   }
 
   // Do lookups for all attribute groups.
-  for (unsigned i = 0, e = PAL.getNumSlots(); i != e; ++i) {
-    IndexAndAttrSet Pair = {PAL.getSlotIndex(i), PAL.getSlotAttributes(i)};
+  for (unsigned i = PAL.index_begin(), e = PAL.index_end(); i != e; ++i) {
+    AttributeSet AS = PAL.getAttributes(i);
+    if (!AS.hasAttributes())
+      continue;
+    IndexAndAttrSet Pair = {i, AS};
     unsigned &Entry = AttributeGroupMap[Pair];
     if (Entry == 0) {
       AttributeGroups.push_back(Pair);