[PATCH] PR8541; X86: Handle unwind.init and eh.return intrinsics.

[Pasi Parviainen]

Hi,

First patch addresses the problem in PR8541. It forces spilling of 
affected registers to stack when unwind.init and eh.return intrinsics 
are encountered.

Second patch is additional patch which relaxes the requirement of frame 
pointer in functions with eh.return.

Pasi
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