[PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)

[Eric Botcazou]

> For a long time, the gcc community has been happy "knowing" that it has
> been wrong to insert code into a libcall and has been willing to simply
> fix wrong code problems as they have been reported.  What we did was
> make many of the cases where an insn is inserted into a libcall into a
> compiler icing situation.  What has been extremely frustrating has been
> Eric's personal attacks, by first calling this a "bug" and then calling
> it "half backed."

Of course, double typo, I meant "half-baked".

I'm sorry that you took my messages as personal attacks, they aren't.  What
I do criticize is the handling of libcalls in dce.c and the introduction of 
the REG_LIBCALL_ID note.

-- 
Eric Botcazou