GCSE considers read only memory clobbered by function calls.

[Mostafa Hagog]

Jeffrey A Law <law@redhat.com> wrote on 09/05/2005 18:17:45:

> Yes, it looks quite reasonable.  Please go ahead with the full testing
> cycle and consider the patch pre-approved once complete.
>
I have changed the patch according to some feedbacks that I have got -- the
main idea didn't change. One change is to check the MEM_READONLY_P flag
also in load_killed_in_block. The new patch is attached below. bootstrap
passed (with -O2 -g -fgcse -fgcse-las --param max-gcse-passes=3) and no new
regressions on powerpc-apple-darwin.

Since I have changed the patch a bit I am asking again for approval to
commit.

2005-05-23 Mostafa Hagog <mustafa@il.ibm.com>

      * gcse.c (compute_transp, load_killed_in_block): use MEM_READONLY_P.

(See attached file: gcse_las3.patch)
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