[llvm] [TTI][AMDGPU] Allow targets to adjust `LastCallToStaticBonus` via `getInliningLastCallToStaticBonus` (PR #111311)

[Juan Manuel Martinez Caamaño via llvm-commits]

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@@ -75,6 +75,10 @@ static cl::opt<size_t> InlineMaxBB(
     cl::desc("Maximum number of BBs allowed in a function after inlining"
              " (compile time constraint)"));
 
+static cl::opt<unsigned> InlineLastCallToStaticBonus(
+    "amdgpu-inline-last-call-to-static-bonus", cl::Hidden, cl::init(165000),
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jmmartinez wrote:

What do you think about keeping it as a constant and not an option?

I don't think nobody is ever going to use that option.

And in your test the bonus contribution is already clear by comparing the scores for `@callee_not_only_one_live_use` and `@callee_only_one_live_use`.

https://github.com/llvm/llvm-project/pull/111311