[Bug target/14454] [3.3/3.4/4.0 Regression] virtual function with vararg won't compile

[ebotcazou at gcc dot gnu dot org]

------- Additional Comments From ebotcazou at gcc dot gnu dot org  2004-10-10 08:39 -------
> It will be a negative number, the value of which depends on the number of
> vbases + virtual functions declared with morally[%] virtual heirarchies.
> I suspect mip's -32768 limit would be a sensible implementation limit. That will
> allow 8192 virtualbases+virtualfunctionswithinthem

Thanks for your answer.  I presume 8192 is valid only in 32-bit mode?  In either
case, this doesn't really matter since we (almost always) have 2 scratch regs in
64-bit mode.  The problematic case is 32-bit mode, where we only have 1 scratch
reg and the range of the 'add' immediate field is -4096..4095.  Given your
estimation, I think I'll not add spill code and always resort to multiple adds.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14454