[Bug debug/43177] Handle at least simple cases of reversible insns in debug info

[jakub at gcc dot gnu dot org]

------- Comment #5 from jakub at gcc dot gnu dot org  2010-03-03 06:59 -------
Subject: Bug 43177

Author: jakub
Date: Wed Mar  3 06:59:09 2010
New Revision: 157188

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=157188
Log:
        PR debug/43177
        * var-tracking.c (loc_cmp): Don't assert VALUEs have the same mode.
        (VAL_EXPR_HAS_REVERSE): Define.
        (reverse_op): New function.
        (add_stores): For reversible operations add an extra MO_VAL_USE.

        * gcc.dg/guality/pr43177.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/guality/pr43177.c
Modified:
    trunk/gcc/var-tracking.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43177