[gcc r14-9016] aarch64: Fix undefined code in vect_ctz_1.c

[gcc r14-9016] aarch64: Fix undefined code in vect_ctz_1.c

[Andrew Pinski]

https://gcc.gnu.org/g:cb80582229e7800eeb9570c24186b843dff5fcd7

commit r14-9016-gcb80582229e7800eeb9570c24186b843dff5fcd7
Author: Andrew Pinski <quic_apinski@quicinc.com>
Date:   Fri Feb 2 13:13:58 2024 -0800

    aarch64: Fix undefined code in vect_ctz_1.c
    
    The testcase gcc.target/aarch64/vect_ctz_1.c fails execution when running
    with -march=armv9-a due to the testcase calls __builtin_ctz with a value of 0.
    The testcase should not depend on undefined behavior of __builtin_ctz. So this
    changes it to use the g form with the 2nd argument of 32. Now the execution part
    of the testcase work. It still has a scan-assembler failure which should be fixed
    seperately.
    
    Tested on aarch64-linux-gnu.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/aarch64/vect_ctz_1.c (TEST): Use g form of the builtin and pass 32
            as the value expected at 0.
    
    Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>

Diff:
---
 gcc/testsuite/gcc.target/aarch64/vect_ctz_1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.target/aarch64/vect_ctz_1.c b/gcc/testsuite/gcc.target/aarch64/vect_ctz_1.c
index c4eaf5b3a91d..5fcf1e31ab2c 100644
--- a/gcc/testsuite/gcc.target/aarch64/vect_ctz_1.c
+++ b/gcc/testsuite/gcc.target/aarch64/vect_ctz_1.c
@@ -9,7 +9,7 @@ count_tz_##name (unsigned *__restrict a, int *__restrict b) \
 { \
   int i; \
   for (i = 0; i < count; i++) \
-    b[i] = __builtin_##subname (a[i]); \
+    b[i] = __builtin_##subname##g (a[i], 32); \
 }
 
 #define CHECK(name, count, input, output) \