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Re: Improve DSE in the presence of calls
- From: Jeff Law <law at redhat dot com>
- To: Ramana Radhakrishnan <ramana dot radhakrishnan at linaro dot org>
- Cc: Easwaran Raman <eraman at google dot com>, gcc-patches at gcc dot gnu dot org, Richard Guenther <richard dot guenther at gmail dot com>
- Date: Mon, 20 Jun 2011 09:22:57 -0600
- Subject: Re: Improve DSE in the presence of calls
- References: <BANLkTinF9U1TKke5LAeB4ywA+Cbng==5KA@mail.gmail.com> <4DB5A955.7030400@redhat.com> <BANLkTik9b8HXtKb9O6QiS41d-2z2+bP4MQ@mail.gmail.com> <4DBF7886.9000101@redhat.com> <BANLkTimyXsXAqZ=4pQ8fpqKRsZ_JiJyYwQ@mail.gmail.com> <BANLkTi=aSdHqmFUpCQCmXBVqc3HLocWHGw@mail.gmail.com> <BANLkTi=+=wSc+yPfDZwnAWQAWFW8fuL2RQ@mail.gmail.com>
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On 06/18/11 03:10, Ramana Radhakrishnan wrote:
> This seems to have triggered
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49452
>
> on arm-linux-gnueabi
>
> Might well be a DUP of PR49429 but I haven't looked at it yet.
It is effectively a duplicate; with the notable difference that instead
of an explicit memcpy call, the memcpy appears in the RTL
> > (insn 38 37 39 2 (set (mem:BLK (scratch) [0 A8])
> (unspec:BLK [
> (reg/f:SI 13 sp)
> (reg/f:SI 11 fp)
> ] UNSPEC_PRLG_STK))
> /home/ramrad01/sources/fsf/trunk/gcc/testsuite/gcc.c-torture/execute/comp-goto-2.c:11
> -1
> (nil))
Jeff
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