[PATCH] [ARM] Be Conservative when coalescing into SP

[Quentin Colombet]

Hi,

The proposed target hook is not flexible enough IMHO.
What if the reserved register is a source register?
What if the destination MI has several destination register, which one are we looking at?

I believe the right answer would be: provide the ReservedReg and the operand index.

Thanks,
-Quentin

PS: Please upload the context with your patch. This helps reviewing.


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  rL LLVM

http://reviews.llvm.org/D10287

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