diff --git a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vclz.c b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vclz.c
new file mode 100644
index 0000000..ad28d2d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vclz.c
@@ -0,0 +1,194 @@
+#include <arm_neon.h>
+#include "arm-neon-ref.h"
+#include "compute-ref-data.h"
+
+/* Expected results.  */
+VECT_VAR_DECL(expected,int,8,8) [] = { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };
+VECT_VAR_DECL(expected,int,16,4) [] = { 0x3, 0x3, 0x3, 0x3 };
+VECT_VAR_DECL(expected,int,32,2) [] = { 0x11, 0x11 };
+VECT_VAR_DECL(expected,int,64,1) [] = { 0x3333333333333333 };
+VECT_VAR_DECL(expected,uint,8,8) [] = { 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2 };
+VECT_VAR_DECL(expected,uint,16,4) [] = { 0x0, 0x0, 0x0, 0x0 };
+VECT_VAR_DECL(expected,uint,32,2) [] = { 0x5, 0x5 };
+VECT_VAR_DECL(expected,uint,64,1) [] = { 0x3333333333333333 };
+VECT_VAR_DECL(expected,poly,8,8) [] = { 0x33, 0x33, 0x33, 0x33,
+					0x33, 0x33, 0x33, 0x33 };
+VECT_VAR_DECL(expected,poly,16,4) [] = { 0x3333, 0x3333, 0x3333, 0x3333 };
+VECT_VAR_DECL(expected,hfloat,32,2) [] = { 0x33333333, 0x33333333 };
+VECT_VAR_DECL(expected,int,8,16) [] = { 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2,
+					0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2 };
+VECT_VAR_DECL(expected,int,16,8) [] = { 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3 };
+VECT_VAR_DECL(expected,int,32,4) [] = { 0x3, 0x3, 0x3, 0x3 };
+VECT_VAR_DECL(expected,int,64,2) [] = { 0x3333333333333333,
+					0x3333333333333333 };
+VECT_VAR_DECL(expected,uint,8,16) [] = { 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3,
+					 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3 };
+VECT_VAR_DECL(expected,uint,16,8) [] = { 0xd, 0xd, 0xd, 0xd,
+					 0xd, 0xd, 0xd, 0xd };
+VECT_VAR_DECL(expected,uint,32,4) [] = { 0x1f, 0x1f, 0x1f, 0x1f };
+VECT_VAR_DECL(expected,uint,64,2) [] = { 0x3333333333333333,
+					 0x3333333333333333 };
+VECT_VAR_DECL(expected,poly,8,16) [] = { 0x33, 0x33, 0x33, 0x33,
+					 0x33, 0x33, 0x33, 0x33,
+					 0x33, 0x33, 0x33, 0x33,
+					 0x33, 0x33, 0x33, 0x33 };
+VECT_VAR_DECL(expected,poly,16,8) [] = { 0x3333, 0x3333, 0x3333, 0x3333,
+					 0x3333, 0x3333, 0x3333, 0x3333 };
+VECT_VAR_DECL(expected,hfloat,32,4) [] = { 0x33333333, 0x33333333,
+					   0x33333333, 0x33333333 };
+
+
+/* Expected results with input=0.  */
+VECT_VAR_DECL(expected_with_0,int,8,8) [] = { 0x8, 0x8, 0x8, 0x8,
+					      0x8, 0x8, 0x8, 0x8 };
+VECT_VAR_DECL(expected_with_0,int,16,4) [] = { 0x10, 0x10, 0x10, 0x10 };
+VECT_VAR_DECL(expected_with_0,int,32,2) [] = { 0x20, 0x20 };
+VECT_VAR_DECL(expected_with_0,int,64,1) [] = { 0x3333333333333333 };
+VECT_VAR_DECL(expected_with_0,uint,8,8) [] = { 0x8, 0x8, 0x8, 0x8,
+					       0x8, 0x8, 0x8, 0x8 };
+VECT_VAR_DECL(expected_with_0,uint,16,4) [] = { 0x10, 0x10, 0x10, 0x10 };
+VECT_VAR_DECL(expected_with_0,uint,32,2) [] = { 0x20, 0x20 };
+VECT_VAR_DECL(expected_with_0,uint,64,1) [] = { 0x3333333333333333 };
+VECT_VAR_DECL(expected_with_0,poly,8,8) [] = { 0x33, 0x33, 0x33, 0x33,
+					       0x33, 0x33, 0x33, 0x33 };
+VECT_VAR_DECL(expected_with_0,poly,16,4) [] = { 0x3333, 0x3333, 0x3333, 0x3333 };
+VECT_VAR_DECL(expected_with_0,hfloat,32,2) [] = { 0x33333333, 0x33333333 };
+VECT_VAR_DECL(expected_with_0,int,8,16) [] = { 0x8, 0x8, 0x8, 0x8,
+					       0x8, 0x8, 0x8, 0x8,
+					       0x8, 0x8, 0x8, 0x8,
+					       0x8, 0x8, 0x8, 0x8 };
+VECT_VAR_DECL(expected_with_0,int,16,8) [] = { 0x10, 0x10, 0x10, 0x10,
+					       0x10, 0x10, 0x10, 0x10 };
+VECT_VAR_DECL(expected_with_0,int,32,4) [] = { 0x20, 0x20, 0x20, 0x20 };
+VECT_VAR_DECL(expected_with_0,int,64,2) [] = { 0x3333333333333333,
+					       0x3333333333333333 };
+VECT_VAR_DECL(expected_with_0,uint,8,16) [] = { 0x8, 0x8, 0x8, 0x8,
+						0x8, 0x8, 0x8, 0x8,
+						0x8, 0x8, 0x8, 0x8,
+						0x8, 0x8, 0x8, 0x8 };
+VECT_VAR_DECL(expected_with_0,uint,16,8) [] = { 0x10, 0x10, 0x10, 0x10,
+						0x10, 0x10, 0x10, 0x10 };
+VECT_VAR_DECL(expected_with_0,uint,32,4) [] = { 0x20, 0x20, 0x20, 0x20 };
+VECT_VAR_DECL(expected_with_0,uint,64,2) [] = { 0x3333333333333333,
+						0x3333333333333333 };
+VECT_VAR_DECL(expected_with_0,poly,8,16) [] = { 0x33, 0x33, 0x33, 0x33,
+						0x33, 0x33, 0x33, 0x33,
+						0x33, 0x33, 0x33, 0x33,
+						0x33, 0x33, 0x33, 0x33 };
+VECT_VAR_DECL(expected_with_0,poly,16,8) [] = { 0x3333, 0x3333, 0x3333, 0x3333,
+						0x3333, 0x3333, 0x3333, 0x3333 };
+VECT_VAR_DECL(expected_with_0,hfloat,32,4) [] = { 0x33333333, 0x33333333,
+						  0x33333333, 0x33333333 };
+
+#define INSN_NAME vclz
+#define TEST_MSG "VCLZ/VCLZQ"
+
+#define FNNAME1(NAME) void exec_ ## NAME (void)
+#define FNNAME(NAME) FNNAME1(NAME)
+
+FNNAME (INSN_NAME)
+{
+  /* Basic test: y=vclz(x), then store the result.  */
+#define TEST_UNARY_OP1(INSN, Q, T1, T2, W, N)				\
+  VECT_VAR(vector_res, T1, W, N) =					\
+    INSN##Q##_##T2##W(VECT_VAR(vector, T1, W, N));			\
+  vst1##Q##_##T2##W(VECT_VAR(result, T1, W, N), VECT_VAR(vector_res, T1, W, N))
+
+#define TEST_UNARY_OP(INSN, Q, T1, T2, W, N)	\
+  TEST_UNARY_OP1(INSN, Q, T1, T2, W, N)		\
+
+  /* No need for 64 bits variants */
+  DECL_VARIABLE(vector, int, 8, 8);
+  DECL_VARIABLE(vector, int, 16, 4);
+  DECL_VARIABLE(vector, int, 32, 2);
+  DECL_VARIABLE(vector, uint, 8, 8);
+  DECL_VARIABLE(vector, uint, 16, 4);
+  DECL_VARIABLE(vector, uint, 32, 2);
+  DECL_VARIABLE(vector, int, 8, 16);
+  DECL_VARIABLE(vector, int, 16, 8);
+  DECL_VARIABLE(vector, int, 32, 4);
+  DECL_VARIABLE(vector, uint, 8, 16);
+  DECL_VARIABLE(vector, uint, 16, 8);
+  DECL_VARIABLE(vector, uint, 32, 4);
+
+  DECL_VARIABLE(vector_res, int, 8, 8);
+  DECL_VARIABLE(vector_res, int, 16, 4);
+  DECL_VARIABLE(vector_res, int, 32, 2);
+  DECL_VARIABLE(vector_res, uint, 8, 8);
+  DECL_VARIABLE(vector_res, uint, 16, 4);
+  DECL_VARIABLE(vector_res, uint, 32, 2);
+  DECL_VARIABLE(vector_res, int, 8, 16);
+  DECL_VARIABLE(vector_res, int, 16, 8);
+  DECL_VARIABLE(vector_res, int, 32, 4);
+  DECL_VARIABLE(vector_res, uint, 8, 16);
+  DECL_VARIABLE(vector_res, uint, 16, 8);
+  DECL_VARIABLE(vector_res, uint, 32, 4);
+
+  clean_results ();
+
+  /* Fill input vector with arbitrary values.  */
+  VDUP(vector, , int, s, 8, 8, 0x84);
+  VDUP(vector, , int, s, 16, 4, 0x1234);
+  VDUP(vector, , int, s, 32, 2, 0x5678);
+  VDUP(vector, , uint, u, 8, 8, 0x34);
+  VDUP(vector, , uint, u, 16, 4, 0x8234);
+  VDUP(vector, , uint, u, 32, 2, 0x7654321);
+  VDUP(vector, q, int, s, 8, 16, 0x34);
+  VDUP(vector, q, int, s, 16, 8, 0x1234);
+  VDUP(vector, q, int, s, 32, 4, 0x12345678);
+  VDUP(vector, q, uint, u, 8, 16, 0x13);
+  VDUP(vector, q, uint, u, 16, 8, 0x4);
+  VDUP(vector, q, uint, u, 32, 4, 0x1);
+
+  /* Apply a unary operator named INSN_NAME.  */
+  TEST_UNARY_OP(INSN_NAME, , int, s, 8, 8);
+  TEST_UNARY_OP(INSN_NAME, , int, s, 16, 4);
+  TEST_UNARY_OP(INSN_NAME, , int, s, 32, 2);
+  TEST_UNARY_OP(INSN_NAME, , uint, u, 8, 8);
+  TEST_UNARY_OP(INSN_NAME, , uint, u, 16, 4);
+  TEST_UNARY_OP(INSN_NAME, , uint, u, 32, 2);
+  TEST_UNARY_OP(INSN_NAME, q, int, s, 8, 16);
+  TEST_UNARY_OP(INSN_NAME, q, int, s, 16, 8);
+  TEST_UNARY_OP(INSN_NAME, q, int, s, 32, 4);
+  TEST_UNARY_OP(INSN_NAME, q, uint, u, 8, 16);
+  TEST_UNARY_OP(INSN_NAME, q, uint, u, 16, 8);
+  TEST_UNARY_OP(INSN_NAME, q, uint, u, 32, 4);
+
+  CHECK_RESULTS (TEST_MSG, "");
+
+  /* Test with zero as input.  */
+  VDUP(vector, , int, s, 8, 8, 0);
+  VDUP(vector, , int, s, 16, 4, 0);
+  VDUP(vector, , int, s, 32, 2, 0);
+  VDUP(vector, , uint, u, 8, 8, 0);
+  VDUP(vector, , uint, u, 16, 4, 0);
+  VDUP(vector, , uint, u, 32, 2, 0);
+  VDUP(vector, q, int, s, 8, 16, 0);
+  VDUP(vector, q, int, s, 16, 8, 0);
+  VDUP(vector, q, int, s, 32, 4, 0);
+  VDUP(vector, q, uint, u, 8, 16, 0);
+  VDUP(vector, q, uint, u, 16, 8, 0);
+  VDUP(vector, q, uint, u, 32, 4, 0);
+
+  /* Apply a unary operator named INSN_NAME.  */
+  TEST_UNARY_OP(INSN_NAME, , int, s, 8, 8);
+  TEST_UNARY_OP(INSN_NAME, , int, s, 16, 4);
+  TEST_UNARY_OP(INSN_NAME, , int, s, 32, 2);
+  TEST_UNARY_OP(INSN_NAME, , uint, u, 8, 8);
+  TEST_UNARY_OP(INSN_NAME, , uint, u, 16, 4);
+  TEST_UNARY_OP(INSN_NAME, , uint, u, 32, 2);
+  TEST_UNARY_OP(INSN_NAME, q, int, s, 8, 16);
+  TEST_UNARY_OP(INSN_NAME, q, int, s, 16, 8);
+  TEST_UNARY_OP(INSN_NAME, q, int, s, 32, 4);
+  TEST_UNARY_OP(INSN_NAME, q, uint, u, 8, 16);
+  TEST_UNARY_OP(INSN_NAME, q, uint, u, 16, 8);
+  TEST_UNARY_OP(INSN_NAME, q, uint, u, 32, 4);
+
+  CHECK_RESULTS_NAMED (TEST_MSG, expected_with_0, " (input=0)");
+}
+
+int main (void)
+{
+  exec_vclz ();
+  return 0;
+}
