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[WIP] Turn MIR copies into moves - #46869
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scottmcm wants to merge 4 commits into
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Outputs in InlineAsm can be read-write, so splitting it out is useful for things like Store-Store folding, as it cannot be done for a Store-AsmOutput. This PR is intended to make no changes, just be the mechanical split of the enum. Future changes can use the split, like a MIR pass I'm working on and perhaps two-phase borrows.
…s the def if there is no use. Gives the upcoming NRVO pass more `move`s to work with. Done in a single pass over the MIR
rust-highfive
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Dec 20, 2017
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(rust_highfive has picked a reviewer for you, use r? to override) |
oli-obk
commented
Dec 20, 2017
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Some compile fail tests are passing |
scottmcm
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Dec 20, 2017
MemberAuthor
Closing as I misunderstood the NRVO plan. |
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Weakens the last copy of a local into a move, or doesn't assign it if there are no uses.
Intended to give the upcoming NRVO pass more moves to work with. Done in a single pass over the MIR.
Depends on #46852