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          Add -Z dump-mir-dataflow flag for dumping dataflow results visualization
          #70511
        
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    | r? @davidtwco (rust_highfive has picked a reviewer for you, use r? to override) | 
              
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LGTM!
| @bors r+ | 
| 📌 Commit 4d1194c has been approved by  | 
| 🌲 The tree is currently closed for pull requests below priority 1000, this pull request will be tested once the tree is reopened | 
    
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…z, r=davidtwco Add `-Z dump-mir-dataflow` flag for dumping dataflow results visualization Previously, to visualize the results of a MIR dataflow pass, one had to add a `#[rustc_mir(borrowck_graphviz_postflow)]` attribute to functions of interest. However, there is no way to specify this attribute on closures and generators, so it was impossible to view results for these MIR bodies. This PR adds a flag, `-Z dump-mir-dataflow`, which will output the dataflow results for any functions specified in `-Z dump-mir` to the output directory specified by `-Z dump-mir-dir`. This behavior is modeled on the `-Z dump-mir-graphviz` flag.
    
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Rollup of 6 pull requests Successful merges: - rust-lang#70511 (Add `-Z dump-mir-dataflow` flag for dumping dataflow results visualization) - rust-lang#70522 (Improve error messages for raw strings (rust-lang#60762)) - rust-lang#70547 (Add `can_unwind` field to `FnAbi`) - rust-lang#70591 (Ensure LLVM is in the link path for "fulldeps" tests) - rust-lang#70627 (Use place directly its copy) - rust-lang#70652 (Add git repo address to unstable book) Failed merges: - rust-lang#70634 (Remove some reexports in `rustc_middle`) r? @ghost
  
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Previously, to visualize the results of a MIR dataflow pass, one had to add a
#[rustc_mir(borrowck_graphviz_postflow)]attribute to functions of interest. However, there is no way to specify this attribute on closures and generators, so it was impossible to view results for these MIR bodies.This PR adds a flag,
-Z dump-mir-dataflow, which will output the dataflow results for any functions specified in-Z dump-mirto the output directory specified by-Z dump-mir-dir. This behavior is modeled on the-Z dump-mir-graphvizflag.