[PATCH] D136180: [FuncSpec] Compute specialisation gain even when forcing specialisation

[Chuanqi Xu via Phabricator via llvm-commits]

ChuanqiXu added a comment.

In D136180#3867731 <https://reviews.llvm.org/D136180#3867731>, @chill wrote:

> I don't think it's a problem at all, it's just what is, for a call site with n constants, there are 2^n-1 possible specialisations, that match the call.

But what's the case that we'll get worse gain with more constants? I mean, if a callsite has n constants, then we can get the gain for this callsite by specializing all the constants. For a callsite `foo(1, 2)`, in what case it will be better to specialize it as `foo_1(2)` than `foo_1_2()`? Hope I express my meaning clearly.


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