r251006 - in /trunk/gcc/go/gofrontend: MERGE ex...

[ian@gcc.gnu.org]

Author: ian
Date: Wed Aug  9 21:24:00 2017
New Revision: 251006

URL: https://gcc.gnu.org/viewcvs?rev=251006&root=gcc&view=rev
Log:
    compiler: fix buglet in lshift type determination
    
    It's possible to construct an lshift expression using unsafe.Sizeof
    that is technically a compile-time constant but can't be evaluated
    without going through backend methods. In this case, insure that
    Type::make_non_abstract_type is called on the numeric operand of the
    shift (as opposed to leaving as abstract), to avoid an assert later on
    in the compiler flow.
    
    Fixes golang/go#21372.
    
    Reviewed-on: https://go-review.googlesource.com/54370

Modified:
    trunk/gcc/go/gofrontend/MERGE
    trunk/gcc/go/gofrontend/expressions.cc