Make gcc.dg/vect/vect-simd-clone-24.c more robust

When -march=cascadelake is added we get 256bit vectorization by
default but there's no OMP SIMD ABI for this case with inbranch.
So add -mprefer-vector-width=512 to the testcase.

	PR tree-optimization/122776
	* gcc.dg/vect/vect-simd-clone-24.c: Add -mprefer-vector-width=512.

diff --git a/gcc/testsuite/gcc.dg/vect/vect-simd-clone-24.c b/gcc/testsuite/gcc.dg/vect/vect-simd-clone-24.c
index 35459d5d5b9e6b6b9b37524d1961fa3ef7072173..5281dfa0a02c74071a70fa7f378e187bd92e0dc6 100644 (file)
--- a/gcc/testsuite/gcc.dg/vect/vect-simd-clone-24.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-simd-clone-24.c
@@ -2,7 +2,7 @@
 /* { dg-skip-if "" { *-*-* } { "-flto" } { "" } } */
 /* { dg-require-effective-target vect_simd_clones } */
 /* { dg-additional-options "-fopenmp-simd --param vect-partial-vector-usage=1 -fdump-tree-dce6 -w" } */
-/* { dg-additional-options "-mavx512f" { target avx512f } } */
+/* { dg-additional-options "-mavx512f -mprefer-vector-width=512" { target avx512f } } */
 
 #pragma omp declare simd simdlen(16)
 int __attribute__((const)) baz (int x);