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| author | Tomasz Miąsko <tomasz.miasko@gmail.com> | 2022-12-03 00:00:00 +0000 |
|---|---|---|
| committer | Tomasz Miąsko <tomasz.miasko@gmail.com> | 2023-01-10 09:53:18 +0100 |
| commit | 836ef6162dfe11c603854851a4a9b5c5e856f0d5 (patch) | |
| tree | 488f5a8635c0a86aecc94123cac2407b8ca29486 /compiler | |
| parent | deba5ddd0776108c51a69844d0ffe3f96886dd52 (diff) | |
| download | rust-836ef6162dfe11c603854851a4a9b5c5e856f0d5.tar.gz rust-836ef6162dfe11c603854851a4a9b5c5e856f0d5.zip | |
Add comment to cleanup_kinds
based on the original commit message 1ae7ae0c1c7ed68c616273f245647afa47f3cbde
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/mir/analyze.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_ssa/src/mir/analyze.rs b/compiler/rustc_codegen_ssa/src/mir/analyze.rs index c7617d2e464..dd1ac2c74ae 100644 --- a/compiler/rustc_codegen_ssa/src/mir/analyze.rs +++ b/compiler/rustc_codegen_ssa/src/mir/analyze.rs @@ -261,6 +261,9 @@ impl CleanupKind { } } +/// MSVC requires unwinding code to be split to a tree of *funclets*, where each funclet can only +/// branch to itself or to its parent. Luckily, the code we generates matches this pattern. +/// Recover that structure in an analyze pass. pub fn cleanup_kinds(mir: &mir::Body<'_>) -> IndexVec<mir::BasicBlock, CleanupKind> { fn discover_masters<'tcx>( result: &mut IndexVec<mir::BasicBlock, CleanupKind>, |