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Re: Why does IRA force all pseudos live across a setjmp call to be spilled?
- From: Eric Botcazou <ebotcazou at adacore dot com>
- To: Segher Boessenkool <segher at kernel dot crashing dot org>
- Cc: gcc at gcc dot gnu dot org, Peter Bergner <bergner at vnet dot ibm dot com>, Jeff Law <law at redhat dot com>, Vladimir N Makarov <vmakarov at redhat dot com>, Pat Haugen <pthaugen at linux dot vnet dot ibm dot com>
- Date: Mon, 05 Mar 2018 08:09:26 +0100
- Subject: Re: Why does IRA force all pseudos live across a setjmp call to be spilled?
- Authentication-results: sourceware.org; auth=none
- References: <141cfa78-f202-029a-e530-24e657692bff@vnet.ibm.com> <20180305001631.GN21977@gate.crashing.org> <1798327.obcmBFoBij@polaris>
> Apparently the authors of the SPARC psABI thought that the last part of your
> sentence is an interpolation and that the (historical) requirements were
> vague enough to allow their interpretation, IOW that the compiler can do
> the work.
And, as PR target/83368 showed, both the GNU and the Solaris libc make use of
the leeway given by the psABI for setjmp at least in some cases.
--
Eric Botcazou