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Run branch cleanup after copy prop

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This commit is contained in:
Oliver Scherer 2019-03-19 12:38:18 +01:00
parent ef4d1c4195
commit ab41023fd4
2 changed files with 23 additions and 0 deletions
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1
src/librustc_mir/transform/mod.rs
View File

@ -285,6 +285,7 @@ fn optimized_mir<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> &'tcx
&simplify_branches::SimplifyBranches::new("after-const-prop"),
&deaggregator::Deaggregator,
&copy_prop::CopyPropagation,
&simplify_branches::SimplifyBranches::new("after-copy-prop"),
&remove_noop_landing_pads::RemoveNoopLandingPads,
&simplify::SimplifyCfg::new("final"),
&simplify::SimplifyLocals,

22
src/test/mir-opt/simplify_match.rs Normal file
View File

@ -0,0 +1,22 @@
fn main() {
match { let x = false; x } {
true => println!("hello world!"),
false => {},
}
}
// END RUST SOURCE
// START rustc.main.SimplifyBranches-after-copy-prop.before.mir
// bb0: {
// ...
// switchInt(const false) -> [false: bb3, otherwise: bb1];
// }
// bb1: {
// END rustc.main.SimplifyBranches-after-copy-prop.before.mir
// START rustc.main.SimplifyBranches-after-copy-prop.after.mir
// bb0: {
// ...
// goto -> bb3;
// }
// bb1: {
// END rustc.main.SimplifyBranches-after-copy-prop.after.mir