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Re: ia32: prologue_epilogue_contains

> Part 1 of N of merging generic new_ia32_branch bits to mainline.
> 
> This is intended to have init_alias_analysis ignore all prologue
> instructions.  If it doesn't, it doesn't consider the frame pointer
> to be a constant base.

Sounds sensible to me.  I assume none of the prologue insns are ever likely
to be useful for alias analysis?

Bernd
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