[Driver] Don't enable -fsanitize-use-after-scope when ASan is disabled
When enabling any sanitizer, -fsanitize-use-after-scope is enabled by
default. This doesn't actually turn ASan on, because we've been getting
lucky and there are extra checks in BackendUtil that stop this from
happening.
However, this has been causing a behavior change: extra lifetime markers
are emitted in some cases where they aren't needed or expected.
llvm-svn: 302468
diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index c298302c..b1f5f86 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -563,12 +563,11 @@
}
}
- if (Arg *A = Args.getLastArg(
- options::OPT_fsanitize_address_use_after_scope,
- options::OPT_fno_sanitize_address_use_after_scope)) {
- AsanUseAfterScope = A->getOption().getID() ==
- options::OPT_fsanitize_address_use_after_scope;
- }
+ AsanUseAfterScope = Args.hasFlag(
+ options::OPT_fsanitize_address_use_after_scope,
+ options::OPT_fno_sanitize_address_use_after_scope, AsanUseAfterScope);
+ } else {
+ AsanUseAfterScope = false;
}
// Parse -link-cxx-sanitizer flag.