r279985 - /branches/gcc-9-branch/gcc/go/gofront...

[ian@gcc.gnu.org]

Author: ian
Date: Wed Jan  8 00:38:34 2020
New Revision: 279985

URL: https://gcc.gnu.org/viewcvs?rev=279985&root=gcc&view=rev
Log:
    compiler: fix loopdepth tracking in array slicing expression in escape analysis
    
    In the gc compiler, for slicing an array, its AST has an implicit
    address operation node. There isn't such node in the gofrontend
    AST. During the escape analysis, we create a fake node to mimic
    the gc compiler's behavior. For the fake node, the loopdepth was
    not tracked correctly, causing miscompilation. Since this is an
    address operation, do the same thing as we do for the address
    operator.
    
    Fixes golang/go#36404.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/213643

Modified:
    branches/gcc-9-branch/gcc/go/gofrontend/escape.cc