Fix gcc 7.5 build break after TypeSize ctors became constexpr

As seen here: https://lab.llvm.org/staging/#/builders/235/builds/1135

diff --git a/llvm/unittests/Support/LinearPolyBaseTest.cpp b/llvm/unittests/Support/LinearPolyBaseTest.cpp
index f9a2d4e..15b3662 100644 (file)
--- a/llvm/unittests/Support/LinearPolyBaseTest.cpp
+++ b/llvm/unittests/Support/LinearPolyBaseTest.cpp
@@ -94,7 +94,7 @@ using Univariate3DBase = UnivariateLinearPolyBase<Univariate3D>;
 class Univariate3D : public Univariate3DBase {
 public:
   using ScalarTy = Univariate3DBase::ScalarTy;
-  Univariate3D(ScalarTy x, unsigned Dim) : Univariate3DBase(x, Dim) {}
+  constexpr Univariate3D(ScalarTy x, unsigned Dim) : Univariate3DBase(x, Dim) {}
   Univariate3D(const Univariate3DBase &Convert) : Univariate3DBase(Convert) {}
 };