[Bug rtl-optimization/46598] [4.5/4.6 Regression] Miscompiles computed goto

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46598

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |NEW
         AssignedTo|rguenth at gcc dot gnu.org  |unassigned at gcc dot
                   |                            |gnu.org

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-23 
14:15:33 UTC ---
Making havege_hardtick long long doesn't solve the problem.  Now we have

(insn 23 22 26 3 pr46598_0.i:20 (parallel [
            (set (reg:DI 1 dx)
                (asm_operands/v:DI ("rdtsc") ("=A") 0 []
                     []
                     [] pr46598_0.i:36))
            (clobber (reg:QI 18 fpsr))
            (clobber (reg:QI 17 flags))
        ]) -1 (nil))

with -m32 we get (reg:DI 0 ax) instead which is ok.  With int havege_hardtick
it's (reg:SI 1 dx) again.

This is not really my area of expertise.  Eh.

Reproducible in a similar way on trunk.