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| author | Ralf Jung <post@ralfj.de> | 2020-05-10 11:34:30 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-05-10 11:34:30 +0200 |
| commit | 62353071af2dd3a731892a951352acb26809eacf (patch) | |
| tree | 0658ea2f25013d458c39c6326a672fa312d320b0 /src/libstd/sys/unix/stack_overflow.rs | |
| parent | b3269536d0a883caa0904cf6589aa1310ff70b5e (diff) | |
| parent | b998497bd41d6de71ec035433247dee856d1f3a5 (diff) | |
| download | rust-62353071af2dd3a731892a951352acb26809eacf.tar.gz rust-62353071af2dd3a731892a951352acb26809eacf.zip | |
Rollup merge of #71840 - matthewjasper:drop-trees, r=oli-obk
Rework MIR drop tree lowering This PR changes how drops are generated in MIR construction. This is the first half of the fix for #47949. Rather than generating the drops for a given unwind/break/continue/return/generator drop path as soon as they are needed, the required drops are recorded and get generated later. The motivation for this is * It simplifies the caching scheme, because it's now possible to walk up the currently scheduled drop tree to recover state. * The basic block order for MIR more closely resembles execution order. This PR also: * Highlights cleanup blocks in the graphviz MIR output. * Removes some unnecessary drop flag assignments.
Diffstat (limited to 'src/libstd/sys/unix/stack_overflow.rs')
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