[PATCH] D53137: Scalable vector core instruction support + size queries

[Diana Picus via Phabricator via cfe-commits]

rovka added a comment.

> I suspect 'ScalableSize' is the wrong term now; 'TypeSize' may be better. Thoughts?

I agree, TypeSize sounds better. Maybe we can replace the public constructor with 2 static methods, TypeSize::Fixed(Size) and TypeSize::Scalable(Size), so we don't always have to spell out /* Scalable =*/.



================
Comment at: llvm/include/llvm/IR/DataLayout.h:454
+    auto BaseSize = getTypeSizeInBits(Ty);
+    return { (BaseSize.getKnownMinSize() + 7) / 8, BaseSize.isScalable() };
   }
----------------
We already overload operator /, why not overload + as well so we don't have to change the body of this method?


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Comment at: llvm/include/llvm/IR/DataLayout.h:487
+    auto BaseSize = getTypeStoreSize(Ty);
+    uint64_t MinAlignedSize = alignTo(BaseSize.getKnownMinSize(),
+                                      getABITypeAlignment(Ty));
----------------
Can we add a version of alignTo that works with ScalableSize instead?


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Comment at: llvm/include/llvm/IR/DataLayout.h:656
+                     getTypeSizeInBits(VTy->getElementType()).getKnownMinSize();
+    return ScalableSize(MinBits, EltCnt.Scalable);
   }
----------------
Maybe just return VTy->getElementCount() * getTypeSizeInBits(VTy->getElementType()).getFixedSize().


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D53137/new/

https://reviews.llvm.org/D53137