[Bug target/39715] [4.5 Regression][cond-optab] extra sign extensions on Thumb

[bonzini at gcc dot gnu dot org]

------- Comment #5 from bonzini at gnu dot org  2009-10-28 10:27 -------
Subject: Bug 39715

Author: bonzini
Date: Wed Oct 28 10:27:15 2009
New Revision: 153651

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=153651
Log:
2009-10-28  Paolo Bonzini  <bonzini@gnu.org>

        PR rtl-optimization/39715
        * combine.c (simplify_comparison): Use extensions to
        widen comparisons.  Try an ANDing first.

testsuite:
2009-10-28  Paolo Bonzini  <bonzini@gnu.org>

        PR rtl-optimization/39715
        * gcc.target/arm/thumb-bitfld1.c: New.


Added:
    trunk/gcc/testsuite/gcc.target/arm/thumb-bitfld1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39715