StateTransform: Do not renumber resume local. #146552
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Some changes occurred to MIR optimizations cc @rust-lang/wg-mir-opt |
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r? compiler |
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Seems reasonable to me. Curious if there was some particular reason this was written this way. @bors r+ |
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StateTransform: Do not renumber resume local. MIR parameters are not explicitly assigned-to when entering the MIR body. If we want to save their values inside the coroutine state, we need to do so explicitly. This was done by renaming the `_2` local, and introducing an explicit assignment pre-transform. This particular trick confuses me. This version makes explicit that we are assigning parameters to saved locals. r? `@dingxiangfei2009`
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Rollup of 4 pull requests Successful merges: - #143613 (Fix backtraces with `-C panic=abort` on linux; emit unwind tables by default) - #145181 (remove FIXME block from `has_significant_drop`, it never encounters inference variables) - #146552 (StateTransform: Do not renumber resume local.) - #146588 (tests/run-make: Update list of statically linked musl targets) r? `@ghost` `@rustbot` modify labels: rollup
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Probably failed in rollup: #146625 (comment) @bors r- |
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This PR was rebased onto a different master commit. Here's a range-diff highlighting what actually changed. Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers. |
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@bors r=jackh726 |
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StateTransform: Do not renumber resume local. MIR parameters are not explicitly assigned-to when entering the MIR body. If we want to save their values inside the coroutine state, we need to do so explicitly. This was done by renaming the `_2` local, and introducing an explicit assignment pre-transform. This particular trick confuses me. This version makes explicit that we are assigning parameters to saved locals. r? `@dingxiangfei2009`
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Rollup of 14 pull requests Successful merges: - #142807 (libtest: expose --fail-fast as an unstable command-line option) - #144871 (Stabilize `btree_entry_insert` feature) - #145071 (Update the minimum external LLVM to 20) - #145181 (remove FIXME block from `has_significant_drop`, it never encounters inference variables) - #145660 (initial implementation of the darwin_objc unstable feature) - #145838 (don't apply temporary lifetime extension rules to non-extended `super let`) - #146259 (Suggest removing Box::new instead of unboxing it) - #146410 (Iterator repeat: no infinite loop for `last` and `count`) - #146460 (Add tidy readme) - #146552 (StateTransform: Do not renumber resume local.) - #146564 (Remove Rvalue::Len again.) - #146581 (Detect attempt to use var-args in closure) - #146588 (tests/run-make: Update list of statically linked musl targets) - #146631 (cg_llvm: Replace some DIBuilder wrappers with LLVM-C API bindings (part 3)) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of #146552 - cjgillot:resume-noremap, r=jackh726 StateTransform: Do not renumber resume local. MIR parameters are not explicitly assigned-to when entering the MIR body. If we want to save their values inside the coroutine state, we need to do so explicitly. This was done by renaming the `_2` local, and introducing an explicit assignment pre-transform. This particular trick confuses me. This version makes explicit that we are assigning parameters to saved locals. r? ``@dingxiangfei2009``
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MIR parameters are not explicitly assigned-to when entering the MIR body. If we want to save their values inside the coroutine state, we need to do so explicitly.
This was done by renaming the
_2local, and introducing an explicit assignment pre-transform. This particular trick confuses me.This version makes explicit that we are assigning parameters to saved locals.
r? @dingxiangfei2009