[Bug c/42544] Bad codegen with signed short cast to unsigned int, then promoted to unsigned long long

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42544

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-26 
09:23:03 UTC ---
Author: jakub
Date: Sat Mar 26 09:23:01 2011
New Revision: 171548

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=171548
Log:
    Backport from mainline
    2011-03-20  Jakub Jelinek  <ja...@redhat.com>

    PR c/42544
    PR c/48197
    * c-common.c (shorten_compare): If primopN is first sign-extended
    to opN and then zero-extended to result type, set primopN to opN.

    * gcc.c-torture/execute/pr42544.c: New test.
    * gcc.c-torture/execute/pr48197.c: New test.

Added:
    branches/gcc-4_6-branch/gcc/testsuite/gcc.c-torture/execute/pr42544.c
    branches/gcc-4_6-branch/gcc/testsuite/gcc.c-torture/execute/pr48197.c
Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/c-family/c-common.c
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog