[libFuzzer] Disable value profiling tests on ARM

[george.karpenkov]

Summary

Some seem fragile, some fail, and some just take a really long time to run.
It does not seem to make sense to support some subset of value profiling tests.

@kcc Any insight on how could ARM affect those? Do the instrumented instructions somehow get optimized out?

[kcc]

no thoughts, sorry.
Matt, do you see this flakiness on e.g. aarch64 linux?

[morehouse]

I've seen the flakiness on buildbots, but haven't been able to reproduce on our aarch64 machine.

compiler-rt/test/fuzzer/value-profile-cmp2.test

+UNSUPPORTED: ios
 CHECK: BINGO
 RUN: %cpp_compiler -fno-sanitize=address %S/SimpleHashTest.cpp -o %t-SimpleHashTest
 RUN: not %run %t-SimpleHashTest -seed=1 -use_cmp=0 -use_value_profile=1 -runs=100000000 -max_len=64 2>&1 | FileCheck %s

compiler-rt/test/fuzzer/value-profile-cmp3.test

+UNSUPPORTED: ios
 CHECK: BINGO
 RUN: %cpp_compiler %S/AbsNegAndConstantTest.cpp -o %t-AbsNegAndConstantTest
 RUN: not %run %t-AbsNegAndConstantTest -seed=1 -use_cmp=0 -use_value_profile=1 -runs=100000000 2>&1 | FileCheck %s

compiler-rt/test/fuzzer/value-profile-div.test

-XFAIL: ios
+UNSUPPORTED: ios
 UNSUPPORTED: aarch64
 CHECK: AddressSanitizer: {{FPE|int-divide-by-zero}}
 RUN: %cpp_compiler %S/DivTest.cpp -fsanitize-coverage=trace-div -o %t-DivTest
 RUN: not %run %t-DivTest -seed=1 -use_value_profile=1 -runs=10000000 2>&1 | FileCheck %s
 

compiler-rt/test/fuzzer/value-profile-mem.test

+UNSUPPORTED: ios
 UNSUPPORTED: freebsd
 CHECK: BINGO
 RUN: %cpp_compiler %S/SingleMemcmpTest.cpp -o %t-SingleMemcmpTest
 RUN: not %run %t-SingleMemcmpTest -seed=1  -use_cmp=0 -use_value_profile=1 -runs=10000000 2>&1 | FileCheck %s

compiler-rt/test/fuzzer/value-profile-set.test

+UNSUPPORTED: ios
 CHECK: BINGO
 RUN: %cpp_compiler %S/FourIndependentBranchesTest.cpp -o %t-FourIndependentBranchesTest
 RUN: not %run %t-FourIndependentBranchesTest -seed=1 -use_cmp=0 -use_value_profile=1 -runs=100000000 2>&1 | FileCheck %s
 

compiler-rt/test/fuzzer/value-profile-strcmp.test

+UNSUPPORTED: ios
 UNSUPPORTED: freebsd
 CHECK: BINGO
 RUN: %cpp_compiler %S/SingleStrcmpTest.cpp -o %t-SingleStrcmpTest
 RUN: not %run %t-SingleStrcmpTest -seed=1  -use_cmp=0 -use_value_profile=1 -runs=10000000 2>&1 | FileCheck %s

compiler-rt/test/fuzzer/value-profile-switch.test

-XFAIL: ios
+UNSUPPORTED: ios
 CHECK: BINGO
 RUN: %cpp_compiler %S/SwitchTest.cpp -o %t-SwitchTest
 RUN: %cpp_compiler %S/Switch2Test.cpp -o %t-Switch2Test
 RUN: not %run %t-SwitchTest  -use_cmp=0 -use_value_profile=1 -runs=100000000 -seed=1 2>&1 | FileCheck %s
 RUN: not %run %t-Switch2Test -use_cmp=0 -use_value_profile=1 -runs=100000000 -seed=1 2>&1 | FileCheck %s