[Bug rtl-optimization/44659] Combiner fails to match QI cmp patterns with upper 8bit register

[ebotcazou at gcc dot gnu dot org]

------- Comment #4 from ebotcazou at gcc dot gnu dot org  2010-06-29 09:24 
-------
Subject: Bug 44659

Author: ebotcazou
Date: Tue Jun 29 09:24:34 2010
New Revision: 161523

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=161523
Log:
        PR rtl-optimization/44659
        * combine.c (make_compound_operation) <SUBREG>: Do not return the
        result of force_to_mode if it partially re-expanded the compound.

Added:
    trunk/gcc/testsuite/gcc.target/i386/extract-1.c
    trunk/gcc/testsuite/gcc.target/i386/extract-2.c
    trunk/gcc/testsuite/gcc.target/i386/extract-3.c
    trunk/gcc/testsuite/gcc.target/i386/extract-4.c
    trunk/gcc/testsuite/gcc.target/i386/extract-5.c
    trunk/gcc/testsuite/gcc.target/i386/extract-6.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44659