[Bug rtl-optimization/59535] [4.9 regression] -Os code size regressions for Thumb1/Thumb2 with LRA

[rearnsha at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59535

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.9 regression] -Os code   |[4.9 regression] -Os code
                   |size regressions for        |size regressions for
                   |Thumb1/Thumb2 (with LRA)?   |Thumb1/Thumb2 with LRA

--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
It seems that one of the major problems is a significant increase in the number
of mov instructions to copy registers from one location to another.  This is
probably due to the two-operand format instructions we have in Thumb.