[Bug target/62642] x86 rdtsc is moved through barrier

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62642

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-09-01
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The problem shows up in IRA stage.
New iteration of spill/restore move
+++Costs: overall -65521000, reg -65536000, mem 15000, ld 0, st 0, move 0
+++       move loops 0, new jumps 0
scanning new insn with uid = 22.
moving def of 88 (insn 6 now) deleting insn with uid = 21.
deleting insn with uid = 6.
rescanning insn with uid = 22.
 22) rather than keep unallocated replacement 93