[Bug tree-optimization/20458] [4.1 regression] structure aliasing causes wrong code

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-03-15 
01:26 -------
Subject: Bug 20458

CVSROOT:        /cvs/gcc
Module name:    gcc
Changes by:     [EMAIL PROTECTED]       2005-03-15 01:26:35

Modified files:
        gcc            : ChangeLog tree-flow-inline.h 
                         tree-ssa-operands.c tree-tailcall.c 
Added files:
        gcc/testsuite/g++.dg/tree-ssa: pr20458.C 

Log message:
        2005-03-14  Daniel Berlin <[EMAIL PROTECTED]>
        
        Fix PR tree-optimization/20458
        
        * tree-flow-inline.h (mark_call_clobbered): Don't fiddle
        DECL_EXTERNAL on STRUCT_FIELD tags.
        (clear_call_clobbered): Ditto.
        * tree-ssa-operands.c (note_addressable): Make sure the original
        variable doesn't slip into the addressable list if we have
        subvars.
        * tree-tailcall.c (suitable_for_tail_opt_p): Look at STRUCT_FIELD
        tags too.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7854&r2=2.7855
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-flow-inline.h.diff?cvsroot=gcc&r1=2.32&r2=2.33
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-operands.c.diff?cvsroot=gcc&r1=2.67&r2=2.68
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-tailcall.c.diff?cvsroot=gcc&r1=2.37&r2=2.38
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/tree-ssa/pr20458.C.diff?cvsroot=gcc&r1=NONE&r2=1.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20458