I'am using gcc-13.2.0, I have given two consecutive builds with make check-gcc and compared test results, i have observed following deviations: 

Result from first test build:
 WARNING: program timed out                                            
 FAIL: gcc.target/i386/avx512bw-pr94509-2.c (test for excess errors)   
 UNRESOLVED: gcc.target/i386/avx512bw-pr94509-2.c compilation failed to

Result from second test build: 
 PASS: gcc.target/i386/avx512bw-pr94509-2.c (test for excess errors)
 PASS: gcc.target/i386/avx512bw-pr94509-2.c execution test

In yocto we are using gcc-13.2.0 and after running gcc testsuite and comparing results we have observed a lot of test result deviations :
for example, test passed in first iteration is moving to unresolved in the next iteration.

 ptestresult.gcc.gcc.dg/20061026.c (test for excess errors): PASS -> UNRESOLVED
        ptestresult.gcc.gcc.dg/20081223-1.c  (test for errors, line 5): PASS -> UNRESOLVED
        ptestresult.gcc.gcc.dg/Warray-bounds-6.c (test for excess errors): PASS -> UNRESOLVED
        ptestresult.gcc.gcc.dg/asm-4.c (test for excess errors): PASS -> UNRESOLVED
        ptestresult.gcc.gcc.dg/attr-access-read-write-2.c  (test for warnings, line 18): PASS -> UNRESOLVED
        ptestresult.gcc.gcc.dg/bitfld-10.c  (test for errors, line 8): PASS -> UNRESOLVED
        ptestresult.gcc.gcc.dg/c2x-complit-4.c: UNRESOLVED -> UNSUPPORTED
        ptestresult.gcc.gcc.dg/c2x-float-5.c: UNRESOLVED -> UNSUPPORTED
        ptestresult.gcc.gcc.dg/c2x-stdarg-5.c (test for excess errors): PASS -> UNRESOLVED
        ptestresult.gcc.gcc.dg/c99-condexpr-1.c (test for excess errors): PASS -> UNRESOLVED
        ptestresult.gcc.gcc.dg/const-float80-ped.c  (test for warnings, line 5): PASS -> UNRESOLVED
 

 1)What can be the reason for this?
 2)How to resolve this kind of issues?
 
 thanks,
 Harish sadineni