[Bug rtl-optimization/60763] [4.9 Regression] ICE in extract_insn starting with rev 208984

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60763

rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #32557|0                           |1
        is obsolete|                            |

--- Comment #15 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 
---
Created attachment 32568
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32568&action=edit
Patch with changelog and comment.

Here's a version of the patch with a comment explaining the gen_rtx_REG.