[Bug tree-optimization/63828] [5 Regression] g++.dg/ipa/devirt-47.C fails for x32

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63828

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 33948
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33948&action=edit
A patch

Tested on Linux/32.