On 4/8/20 4:47 AM, Richard Biener wrote:
On Tue, Apr 7, 2020 at 5:01 PM Martin Liška <mli...@suse.cz> wrote:
Hi.
The patch allows DCE to remove only replaceable operators new and delete.
That's achieved by proper mark up of all these operators in C++ FE.
The patch also brings all tests we've collected so far for the PR.
Patch can bootstrap on x86_64-linux-gnu and survives regression tests.
Ready to be installed?
Grepping for uses of DECL_IS_OPERATOR_* reveals you miss comparing
the new flag in ipa-icf.c and cgraph node dumping in cgraph.c might want
to dump it as well.
Otherwise it looks reasonable.
So the mid-end parts are OK in case FE people are happy with this solution
for GCC 10.
This seems fine for GCC 10, though I wonder about using an attribute for
DECL_REPLACEABLE_OPERATOR rather than taking a bit in all FUNCTION_DECLs
that will only ever be set on a small handful.
For GCC 11 we probably want to make the distinction Jonathan mentions
between new-expressions and direct calls to operator new.
Jason
