[SVE] Remove invalid usage of VectorType::getNumElements in Function

Summary:
Removes usage of VectorType::getNumElements identified by test located
at CodeGen/aarch64-sve-intrinsics/acle_sve_dot.c. This code explicitly
converts a potentially fixed length vector to scalable vector by
constructing the ElementCount = {getNumElements(), true}

Reviewers: rengolin, efriedma, kmclaughlin, c-rhodes, sdesmalen

Reviewed By: efriedma

Subscribers: tschuett, kristof.beyls, hiraditya, rkruppe, psnobl, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D78967

diff --git a/llvm/lib/IR/Function.cpp b/llvm/lib/IR/Function.cpp
index 53ab117..77e0f3f 100644 (file)
--- a/llvm/lib/IR/Function.cpp
+++ b/llvm/lib/IR/Function.cpp
@@ -1074,8 +1074,8 @@ static Type *DecodeFixedType(ArrayRef<Intrinsic::IITDescriptor> &Infos,
     // Return the overloaded type (which determines the pointers address space)
     return Tys[D.getOverloadArgNumber()];
   case IITDescriptor::ScalableVecArgument: {
-    auto *Ty = cast<VectorType>(DecodeFixedType(Infos, Tys, Context));
-    return VectorType::get(Ty->getElementType(), {Ty->getNumElements(), true});
+    auto *Ty = cast<FixedVectorType>(DecodeFixedType(Infos, Tys, Context));
+    return ScalableVectorType::get(Ty->getElementType(), Ty->getNumElements());
   }
   }
   llvm_unreachable("unhandled");