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b252014673
Store the type of each GVN value MIR is fully typed, so type information is an integral part of what defines a value. GVN currently tries to circumvent storing types, which creates all sorts of complexities. This PR stores the type along with the enum `Value` when defining a value index. This allows to simplify a lot of code. Fixes rust-lang/rust#128094 Fixes rust-lang/rust#135128 r? ``````@ghost`````` for perf