[PATCH] D115798: Provide SmallAttrBuilder as a lightweight alternative to AttrBuilder

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

I like the general direction. A possible reframing would be SmallAttrBuilder -> MutableAttributeSet. I think my main question here would be in which contexts we still use / want to use the old AttrBuilder?



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Comment at: llvm/include/llvm/IR/Attributes.h:974
+  SmallVector<Attribute> EnumAttrs;
+  SmallVector<Attribute> StringAttrs;
+  using iterator = typename SmallVector<Attribute>::iterator;
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Just wondering if storing both in one vector would make sense? Would allow reusing the normal comparison on attributes and generally simplify the code. Or is that noticeably less efficient?


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Comment at: llvm/include/llvm/IR/Attributes.h:1125
+  }
+  std::pair<ArrayRef<Attribute>, ArrayRef<Attribute>> uniquify() const {
+    return std::make_pair(ArrayRef<Attribute>(EnumAttrs),
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What is uniquify() supposed to mean in this context?


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  https://reviews.llvm.org/D115798/new/

https://reviews.llvm.org/D115798