[clang] [clang] Fix size and alignment of packed sub-byte integer vectors (PR #161796)

[Steffen Larsen via cfe-commits]

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@@ -2677,6 +2677,16 @@ class ASTContext : public RefCountedBase<ASTContext> {
     return getTypeSizeInCharsIfKnown(QualType(Ty, 0));
   }
 
+  /// Return the size of an element inside a given vector type.
+  uint64_t getVectorElementSize(const VectorType *VTy) const {
+    QualType EltTy = VTy->getElementType();
+    if (VTy->isPackedVectorBoolType(*this))
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steffenlarsen wrote:

The patch adds `isBitIntVectorType` which could be used below. Is that what you had in mind, or do you mean that `isBitIntVectorType` should check for HLSL as well?

https://github.com/llvm/llvm-project/pull/161796