[Bug tree-optimization/20640] [4.0 Regression] ICE on NULL PHI_ARG_DEF

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-04-02 
17:02 -------
Subject: Bug 20640

CVSROOT:        /cvs/gcc
Module name:    gcc
Changes by:     [EMAIL PROTECTED]       2005-04-02 17:02:15

Modified files:
        gcc            : ChangeLog tree-ssa-dce.c 
        gcc/testsuite  : ChangeLog 
Added files:
        gcc/testsuite/gcc.dg/torture: tree-loop-1.c 

Log message:
        gcc/ChangeLog:
        PR tree-optimization/20640
        * tree-ssa-dce.c (remove_dead_stmt): Don't redirect edge to
        post-dominator if it has phi nodes.
        (eliminate_unnecessary_stmts): Remove dead phis in all blocks
        before dead statements.
        gcc/testsuite/ChangeLog:
        PR tree-optimization/20640
        * gcc.dg/torture/tree-loop-1.c: New.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.8088&r2=2.8089
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-dce.c.diff?cvsroot=gcc&r1=2.37&r2=2.38
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5268&r2=1.5269
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/torture/tree-loop-1.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20640