testsuite: arm: disable some gen-vect tests with MVE [PR124704]

Like we already do when Neon enablement does not need a compiler
option, return 0 when MVE is enabled by default.

For instance when checking for -march=armv8.1-m.main+mve.fp+fp.dp (or
-mcpu=cortex-m55), this makes the following tests UNSUPPORTED:

gcc.dg/tree-ssa/gen-vect-11.c
gcc.dg/tree-ssa/gen-vect-11a.c
gcc.dg/tree-ssa/gen-vect-11b.c
gcc.dg/tree-ssa/gen-vect-11c.c
gcc.dg/tree-ssa/gen-vect-2.c

and thus avoids
FAIL: gcc.dg/tree-ssa/gen-vect-11b.c scan-tree-dump-times vect "vectorized 0 loops" 1
FAIL: gcc.dg/tree-ssa/gen-vect-11c.c scan-tree-dump-times vect "vectorized 0 loops" 1

This may be overkill Given that all the other tests mentioned above
PASS, but this is consistent with what we already do for Neon.

gcc/testsuite/ChangeLog:

	PR target/124704
	* lib/target-supports.exp
	(check_effective_target_vect_cmdline_neeed): Handle arm_mve
	similarly to arm_neon.

diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index b9cec13a4c7493d5b33bad16af205bd6554ecb3c..4e2ef968c4e64ff785053b1cde70aa932663d0e0 100644 (file)
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -4617,7 +4617,9 @@ proc check_effective_target_vect_cmdline_needed { } {
             || ([istarget powerpc*-*-*]
                 && [check_effective_target_powerpc_altivec])
             || ([istarget sparc*-*-*] && [check_effective_target_sparc_vis])
-            || ([istarget arm*-*-*] && [check_effective_target_arm_neon])
+            || ([istarget arm*-*-*] && ([check_effective_target_arm_neon]
+                                        || [check_effective_target_arm_mve])
+                )
             || [istarget aarch64*-*-*]
             || [istarget amdgcn*-*-*]
             || [istarget riscv*-*-*]