+ if (Attrs.getSlotIndex(I) == Index) {
+ B.removeAttributes(Attrs.pImpl->getSlotAttributes(I), Index);
+ break;
+ }
+
+ AttrSet.push_back(AttributeSet::get(C, Index, B));
+
+ // Add the remaining attribute slots.
+ for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
+ AttrSet.push_back(getSlotAttributes(I));
+
+ return get(C, AttrSet);
+}
+
+AttributeSet AttributeSet::removeAttributes(LLVMContext &C, unsigned Index,
+ const AttrBuilder &Attrs) const {
+ if (!pImpl) return AttributeSet();
+
+ // FIXME it is not obvious how this should work for alignment.
+ // For now, say we can't pass in alignment, which no current use does.
+ assert(!Attrs.hasAlignmentAttr() && "Attempt to change alignment!");
+
+ // Add the attribute slots before the one we're trying to add.
+ SmallVector<AttributeSet, 4> AttrSet;
+ uint64_t NumAttrs = pImpl->getNumAttributes();
+ AttributeSet AS;
+ uint64_t LastIndex = 0;
+ for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
+ if (getSlotIndex(I) >= Index) {
+ if (getSlotIndex(I) == Index) AS = getSlotAttributes(LastIndex++);