================
@@ -1846,6 +1846,16 @@ class TargetInfo : public TransferrableTargetInfo,
return std::make_pair(64, 64);
}
+ /// Returns the optimal vector type elements based on the provided vector
+ /// type. For example, on some targets, a vector with 3 elements may be
+ /// treated as one with 4 elements to enhance performance.
+ virtual llvm::FixedVectorType *
+ getOptimalVectorType(llvm::FixedVectorType *T, const LangOptions &Opt) const
{
+ if (!Opt.HLSL && T->getNumElements() == 3)
+ return llvm::FixedVectorType::get(T->getElementType(), 4);
----------------
shiltian wrote:
The logic here might look weird, but it preserves the current behavior prior to
this PR.
https://github.com/llvm/llvm-project/pull/104661
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