================
@@ -1011,6 +1011,31 @@ static Value *foldPHINodeOrSelectInst(Instruction &I) {
return foldSelectInst(cast<SelectInst>(I));
}
+/// Returns a fixed vector type equivalent to the memory set by II or nullptr
if
+/// unable to do so.
+static FixedVectorType *getVectorTypeFor(const MemSetInst &II,
+ const DataLayout &DL) {
+ const ConstantInt *Length = dyn_cast<ConstantInt>(II.getLength());
+ if (!Length)
+ return nullptr;
+
+ APInt Val = Length->getValue();
+ if (Val.ugt(std::numeric_limits<unsigned>::max()))
+ return nullptr;
+
+ uint64_t MemSetLen = Val.getZExtValue();
+ auto *VTy = FixedVectorType::get(II.getValue()->getType(), MemSetLen);
----------------
macurtis-amd wrote:
Added comment
https://github.com/llvm/llvm-project/pull/133301
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