[Bug tree-optimization/21574] store_ccp doesn't see through a store.

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-08-17 
07:29 -------
Subject: Bug 21574

CVSROOT:        /cvs/gcc
Module name:    gcc
Changes by:     [EMAIL PROTECTED]       2005-08-17 07:27:49

Modified files:
        gcc            : ChangeLog tree-ssa-ccp.c 
        gcc/testsuite  : ChangeLog 
Added files:
        gcc/testsuite/gcc.dg/tree-ssa: pr21574.c 

Log message:
        PR tree-optimization/21574
        * tree-ssa-ccp.c (likely_value): If the right hand side is a
        constant, return CONSTANT.
        (ccp_lattice_meet): Use operand_equal_p instead of simple_cst_equal.
        (ccp_fold, visit_assignment): Likewise.
        (evaluate_stmt): Handle UNDEFINED and UNKNOWN_VAL the same way.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9757&r2=2.9758
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-ccp.c.diff?cvsroot=gcc&r1=2.86&r2=2.87
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5934&r2=1.5935
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr21574.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21574