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Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp

From: Michael Matz <matz at suse dot de>
To: Richard Biener <richard dot guenther at gmail dot com>
Cc: Peter Bergner <bergner at vnet dot ibm dot com>, Jeff Law <law at redhat dot com>, gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 8 Mar 2018 13:28:00 +0000 (UTC)
Subject: Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp
Authentication-results: sourceware.org; auth=none
References: <93b4b8a7-c6fe-65c0-0609-62ebee669967@redhat.com> <CAFiYyc3ptsvAfoXUzA==_dTp5UB6pQzHOia9MBEYVJNi-HD5CA@mail.gmail.com> <80db4b7a-9b15-4c09-222e-646d68fdf6c0@redhat.com> <alpine.LSU.2.21.1803051751200.10187@wotan.suse.de> <0869f1e3-78f3-7601-225e-e97ad68b5609@redhat.com> <alpine.LSU.2.21.1803051912030.10187@wotan.suse.de> <d5e77a2e-2401-58ca-3aca-ef2350f52c71@redhat.com> <CAFiYyc12Z+9374k6Rj0VKttqsd5r13anoJ4_9TwUQLPv_x0D5A@mail.gmail.com> <92c05db6-01d8-8752-e854-941d538188e9@redhat.com> <d3124b8f-99f7-f9ca-233e-595379fa7f4e@vnet.ibm.com> <alpine.LSU.2.21.1803081251270.5310@wotan.suse.de> <CAFiYyc3AEGdNpEOs6F-mE4FuoWqPNq3NXhyF3BzOvWV9e1h7Sw@mail.gmail.com>

Hi,

On Thu, 8 Mar 2018, Richard Biener wrote:

> Or re-do the warning?  Since in the other thread about setjmp side-effects
> we concluded that setjmp has to preserve all call-saved regs?

Even worse.  On SPARC setjmp clobbers even more than just call-clobbered 
regs (!).


Ciao,
Michael.

References:
- Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp
  - From: Michael Matz
- Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp
  - From: Jeff Law
- Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp
  - From: Michael Matz
- Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp
  - From: Jeff Law
- Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp
  - From: Richard Biener
- Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp
  - From: Jeff Law
- Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp
  - From: Peter Bergner
- Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp
  - From: Michael Matz
- Re: [RFA][PATCH][PR middle-end/61118] Improve tree CFG accuracy for setjmp/longjmp
  - From: Richard Biener

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