: M("BasicAATest", C), B(C), DL(DLString), TLI(TLII), F(nullptr) {}
};
+// FIXME: Both of these are disabled at the moment due to strange buildbot
+// failures. Please see https://bugs.llvm.org/show_bug.cgi?id=42719
+
// Check that a function arg can't trivially alias a global when we're accessing
// >sizeof(global) bytes through that arg, unless the access size is just an
// upper-bound.
-TEST_F(BasicAATest, AliasInstWithObjectOfImpreciseSize) {
+TEST_F(BasicAATest, DISABLED_AliasInstWithObjectOfImpreciseSize) {
F = Function::Create(
FunctionType::get(B.getVoidTy(), {B.getInt32Ty()->getPointerTo()}, false),
GlobalValue::ExternalLinkage, "F", &M);
// Check that we fall back to MayAlias if we see an access of an entire object
// that's just an upper-bound.
-TEST_F(BasicAATest, AliasInstWithFullObjectOfImpreciseSize) {
+TEST_F(BasicAATest, DISABLED_AliasInstWithFullObjectOfImpreciseSize) {
F = Function::Create(
FunctionType::get(B.getVoidTy(), {B.getInt64Ty()}, false),
GlobalValue::ExternalLinkage, "F", &M);