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patch to fix PR57963 (s390)


The following patch fixes

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57963

The page contains a good analysis of the PR from Andreas Krebbel.

The patch was successfully bootstrapped and tested on x86/x86-64 and s390x.

Committed as rev. 201438.

2013-08-02  Vladimir Makarov  <vmakarov@redhat.com>

        PR rtl-optimization/57963
        * lra-constraints.c (reverse_equiv_p, contains_reloaded_insn_p):
        New.
        (lra_constraints): Use them.


Attachment: pr57963.patch
Description: Text document


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