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LLVM lifetime intrinsics and MIR #35171

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@nikomatsakis

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@nikomatsakis

MIR is currently not emitting LLVM lifetime intrinsics. This means we will generate larger stack frames than trans.

cc @eddyb @arielb1 @nagisa, with whom I know I have discussed this

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    A-MIRArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.htmlT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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