[PATCH] D65019: [ARM] push LR before __gnu_mcount_nc on ARM

[Jian Cai via Phabricator via llvm-commits]

jcai19 added a comment.

In D65019#1594704 <https://reviews.llvm.org/D65019#1594704>, @jcai19 wrote:

> In D65019#1594289 <https://reviews.llvm.org/D65019#1594289>, @efriedma wrote:
>
> > I don't like introducing magic calling convention rules for a non-intrinsic function with a specific name; we should model this more explicitly somehow.  Probably the simplest thing to do would be to introduce an ARM intrinsic, lower it to a pseudo-instruction, and expand it late (in ExpandPostRAPseudos or something like that).
>


So I have implemented the codegen part as suggested. To add a new intrinsic for this call seems would introduce quite some code to the target-independent part of SelectionDAG, specifically SelectionDAGBuilder and SelectionDAG classes, just for ARM. Is that wanted? Thanks.


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