4db3d12e6f
Perform instsimplify before inline to eliminate some trivial calls I am currently working on #128081. In the current pipeline, we can get the following clone statements ([godbolt](https://rust.godbolt.org/z/931316fhP)): ``` bb0: { StorageLive(_2); _2 = ((*_1).0: i32); StorageLive(_3); _3 = ((*_1).1: u64); _0 = Foo { a: move _2, b: move _3 }; StorageDead(_3); StorageDead(_2); return; } ``` Analyzing such statements will be simple and fast. We don't need to consider branches or some interfering statements. However, this requires us to run `InstSimplify`, `ReferencePropagation`, and `SimplifyCFG` at least once. I can introduce a new pass, but I think the best place for it would be within `InstSimplify`. I put `InstSimplify` before `Inline`, which takes some of the burden away from `Inline`. r? `@saethlin` |
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