testsuite: [aarch64] Fix aarch64/advsimd-intrinsics/v{trn,uzp,zip}_half.c

Since r11-3402 (g:65c9878641cbe0ed898aa7047b7b994e9d4a5bb1), the
vtrn_half, vuzp_half and vzip_half started failing with

vtrn_half.c:76:17: error: redeclaration of 'vector_float64x2' with no linkage
vtrn_half.c:77:17: error: redeclaration of 'vector2_float64x2' with no linkage
vtrn_half.c:80:17: error: redeclaration of 'vector_res_float64x2' with no linkage

This is because r11-3402 now always declares float64x2 variables for
aarch64, leading to a duplicate declaration in these testcases.

The fix is simply to remove these now useless declarations.

These tests are skipped on arm*, so there is no impact on that target.

2020-09-25  Christophe Lyon  <christophe.lyon@linaro.org>

	gcc/testsuite/
	PR target/71233
	* gcc.target/aarch64/advsimd-intrinsics/vtrn_half.c: Remove
	declarations of vector, vector2, vector_res for float64x2 type.
	* gcc.target/aarch64/advsimd-intrinsics/vuzp_half.c: Likewise.
	* gcc.target/aarch64/advsimd-intrinsics/vzip_half.c: Likewise.

diff --git a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vtrn_half.c b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vtrn_half.c
index 63f820f..25a0f19 100644
--- a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vtrn_half.c
+++ b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vtrn_half.c
@@ -73,11 +73,8 @@ void exec_vtrn_half (void)
   /* Input vector can only have 64 bits.  */
   DECL_VARIABLE_ALL_VARIANTS(vector);
   DECL_VARIABLE_ALL_VARIANTS(vector2);
-  DECL_VARIABLE(vector, float, 64, 2);
-  DECL_VARIABLE(vector2, float, 64, 2);
 
   DECL_VARIABLE_ALL_VARIANTS(vector_res);
-  DECL_VARIABLE(vector_res, float, 64, 2);
 
   clean_results ();
   /* We don't have vtrn1_T64x1, so set expected to the clean value.  */
diff --git a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vuzp_half.c b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vuzp_half.c
index 8706f24..2e6b666 100644
--- a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vuzp_half.c
+++ b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vuzp_half.c
@@ -70,11 +70,8 @@ void exec_vuzp_half (void)
   /* Input vector can only have 64 bits.  */
   DECL_VARIABLE_ALL_VARIANTS(vector);
   DECL_VARIABLE_ALL_VARIANTS(vector2);
-  DECL_VARIABLE(vector, float, 64, 2);
-  DECL_VARIABLE(vector2, float, 64, 2);
 
   DECL_VARIABLE_ALL_VARIANTS(vector_res);
-  DECL_VARIABLE(vector_res, float, 64, 2);
 
   clean_results ();
   /* We don't have vuzp1_T64x1, so set expected to the clean value.  */
diff --git a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vzip_half.c b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vzip_half.c
index 619d6b2..ef42451 100644
--- a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vzip_half.c
+++ b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vzip_half.c
@@ -73,11 +73,8 @@ void exec_vzip_half (void)
   /* Input vector can only have 64 bits.  */
   DECL_VARIABLE_ALL_VARIANTS(vector);
   DECL_VARIABLE_ALL_VARIANTS(vector2);
-  DECL_VARIABLE(vector, float, 64, 2);
-  DECL_VARIABLE(vector2, float, 64, 2);
 
   DECL_VARIABLE_ALL_VARIANTS(vector_res);
-  DECL_VARIABLE(vector_res, float, 64, 2);
 
   clean_results ();
   /* We don't have vzip1_T64x1, so set expected to the clean value.  */