[Bug target/53974] [4.8 Regression] Nearly all tests fail with ADA.CALENDAR.TIME_ERROR : a-calend.adb:603

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53974

--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-07-20 
17:42:19 UTC ---
> I've never seen this.  In addition to HARD_REGNO_MODE_OK, the definition of
> CANNOT_CHANGE_MODE_CLASS prevents mode changes to larger modes
> when it is greater than UNITS_PER_WORD.

On SPARC, this is specified by the 32-bit ABI: if you have

  void foo(int32_t a, int64_t b)

b will be loaded into DImode %o1, which is SImode %o1 & SImode %o2.