Don't use __builtin_alloca_with_align with nvc++
diff --git a/Eigen/src/Core/util/Memory.h b/Eigen/src/Core/util/Memory.h
index 7edd0a1..d59071f 100644
--- a/Eigen/src/Core/util/Memory.h
+++ b/Eigen/src/Core/util/Memory.h
@@ -765,7 +765,7 @@
// We always manually re-align the result of EIGEN_ALLOCA.
// If alloca is already aligned, the compiler should be smart enough to optimize away the re-alignment.
-#if (EIGEN_COMP_GNUC || EIGEN_COMP_CLANG)
+#if ((EIGEN_COMP_GNUC || EIGEN_COMP_CLANG) && !EIGEN_COMP_NVHPC)
#define EIGEN_ALIGNED_ALLOCA(SIZE) __builtin_alloca_with_align(SIZE, CHAR_BIT* EIGEN_DEFAULT_ALIGN_BYTES)
#else
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void* eigen_aligned_alloca_helper(void* ptr) {
