i386 FP comparsion bug (and sollution)

[Jeffrey A Law]

  In message < 19981026090505.29312@atrey.karlin.mff.cuni.cz >you write:
  > The condition code ocasinally sets the CC_REVERSED and TEST_AX (in
  > -mno-ieee-fp case) flags in cc_status variable.
OK.

  > This usually works well.
  > Problem is, that reg-stack pass should emit some swap/mov?f patterns
  > between condition and jump.
"should"?  Or do you mean "could"?

Either way no instruction should ever be emitted between a cc0 setter and its
associated conditional jump.  They must be consecutive in the RTL stream on
the x86 (and any machine which defines HAVE_cc0.

So, if regstack is emitting insns between the cc0 setter and the cc0 user, then
that's a bug.

jeff