Hello, On Wed, 2 Feb 2022, Richard Biener via Gcc-patches wrote:
> This adds a flag to CONSTRUCTOR nodes indicating that for clobbers this > marks the end-of-life of storage as opposed to just ending the lifetime > of the object that occupied it. The dangling pointer diagnostics uses > CLOBBERs but is confused by those emitted by the C++ frontend for > example which emits them for the second purpose at the start of CTORs. > The issue is also appearant for aarch64 in PR104092. > > Distinguishing the two cases is also necessary for the PR90348 fix. (Just FWIW: I agree with the plan to have different types of CLOBBERs, in particular those for marking births) A style nit: > tree clobber = build_clobber (TREE_TYPE (t)); > + CLOBBER_MARKS_EOL (clobber) = 1; I think it really were better if build_clobber() gained an additional argument (non-optional!) that sets the type of it. Ciao, Michael.
