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Cache more MIR traversals #112288

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Cache more MIR traversals #112288

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cab8e35
Use the postorder cache in `traversal::postorder`.
Noratrieb Jun 4, 2023
de9e08a
Use `traversal::{preorder, reachable_as_bitset}` from basic block cache
Noratrieb Jun 4, 2023
7fbc8d4
Revert "Use `traversal::{preorder, reachable_as_bitset}` from basic b…
Noratrieb Jun 5, 2023
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7 changes: 5 additions & 2 deletions compiler/rustc_middle/src/mir/traversal.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -188,8 +188,11 @@ impl<'a, 'tcx> Postorder<'a, 'tcx> {
}
}

pub fn postorder<'a, 'tcx>(body: &'a Body<'tcx>) -> Postorder<'a, 'tcx> {
Postorder::new(&body.basic_blocks, START_BLOCK)
pub type PostorderIter<'a, 'tcx: 'a> =
impl Iterator<Item = (BasicBlock, &'a BasicBlockData<'tcx>)> + ExactSizeIterator;

pub fn postorder<'a, 'tcx>(body: &'a Body<'tcx>) -> PostorderIter<'a, 'tcx> {
body.basic_blocks.postorder().iter().map(|&bb| (bb, &body.basic_blocks[bb]))
}

impl<'a, 'tcx> Iterator for Postorder<'a, 'tcx> {
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