[PATCH] Fix PR rtl-optimization/23241

[Josh Conner]

This patch fixes PR23241, and was discussed on the gcc mailing list  
starting here: http://gcc.gnu.org/ml/gcc/2005-08/msg00159.html

Eric Botcazou recommended I submit this against all open branches, as  
well as 3.3.

Regtested against (3.3, 3.4, 4.0) x (darwin-ppc, i686-pc-linux-gnu)  
and mainline x (darwin-pcc, i686-pc-linux-gnu, arm-none-elf) with no  
regressions.

OK for 3.3, 3.4, 4.0, mainline?

- Josh

2005-08-08  Josh Conner  <jconner@xxxxxxxxx>

        PR 23241
        * combine.c (simplify_comparison): Fix error in determining
        whether to lift a subreg from comparison.



2005-08-08  Josh Conner  <jconner@xxxxxxxxx>

        PR 23241
        * gcc.dg/char-compare.c: New test.