llvm-project/clang/test/SemaCUDA/vla.cu

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// RUN: %clang_cc1 -triple nvptx64-nvidia-cuda -fcuda-is-device -verify %s
// RUN: %clang_cc1 -triple nvptx64-nvidia-cuda -verify -DHOST %s
#include "Inputs/cuda.h"
void host(int n) {
int x[n];
}
__device__ void device(int n) {
int x[n]; // expected-error {{cannot use variable-length arrays in __device__ functions}}
}
__host__ __device__ void hd(int n) {
int x[n];
#ifdef __CUDA_ARCH__
// expected-error@-2 {{cannot use variable-length arrays in __host__ __device__ functions}}
#endif
}
// No error because never codegen'ed for device.
__host__ __device__ inline void hd_inline(int n) {
int x[n];
}
void call_hd_inline() { hd_inline(42); }