Regressions problem (200 failures)

[Jim Kingdon]

> I think GCC shouldn't put out any line notes for the prologue in the
> first place.  That's what's causing the problem, indirectly.  Does GDB
> require a line note in the prologue, or can we wait until the first
> bit of real code?

GDB expects the first line number to be for the real code (unless
something has changed, or I'm remembering it wrong or something - I
didn't actually play around with the test cases).