[Bug target/78720] New: [7 Regression] Illegal instruction in generated code

[babokin at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78720

            Bug ID: 78720
           Summary: [7 Regression] Illegal instruction in generated code
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: babokin at gmail dot com
  Target Milestone: ---

Created attachment 40278
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40278&action=edit
reproducer

> g++ -O2 -march=nehalem -o opt illegal_inst.cpp illegal_inst_const.cpp
> ./opt
Illegal instruction

This is regression, which was introduced in trunk couple days ago.

> gcc --version
gcc (GCC) 7.0.0 20161207 (experimental)