[Bug middle-end/52940] New: conversion from MODE_PARTIAL_INT uses sign extension for unsigned types

[bigotp at acm dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52940

             Bug #: 52940
           Summary: conversion from MODE_PARTIAL_INT uses sign extension
                    for unsigned types
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: big...@acm.org


In expr.c:convert_move, when from_mode has class MODE_PARTIAL_INT the
conversion is done with sign extension even for unsigned types.  This has been
the behavior since the code was added in 2003, but it seems like a bug.