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Auto merge of #37489 - nagisa:unnecessary-clone, r=eddyb

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Do not clone Mir unnecessarily

r? @eddyb
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bors 2016-10-30 20:30:38 -07:00 • committed by GitHub
commit 8f1fc86533
2 changed files with 7 additions and 5 deletions
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3
src/librustc/mir/mod.rs
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@ -63,7 +63,8 @@ macro_rules! newtype_index {
}
/// Lowered representation of a single function.
#[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
// Do not implement clone for Mir, its easy to do so accidently and its kind of expensive.
#[derive(RustcEncodable, RustcDecodable, Debug)]
pub struct Mir<'tcx> {
/// List of basic blocks. References to basic block use a newtyped index type `BasicBlock`
/// that indexes into this vector.