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          coverage: Don't use actual coverage spans in test_make_bcb_counters
          #115912
        
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    | r? @oli-obk (rustbot has picked a reviewer for you, use r? to override) | 
| Some changes occurred to MIR optimizations cc @rust-lang/wg-mir-opt | 
              
                    Zalathar
  
              
              commented
              
                  
                    Sep 17, 2023 
                  
              
              
            
            
| @rustbot label +A-code-coverage | 
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    | Some changes occurred to MIR optimizations cc @rust-lang/wg-mir-opt | 
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    This test calls internal functions in `spans` in order to create a list of coverage spans to pass in when making BCB counters. That makes it difficult to modify those internals without breaking the test. However, making BCB counters doesn't require the actual coverage spans; it just needs some way to identify which BCBs are associated with one or more spans. This can be achieved by passing in a `Fn(BasicCoverageBlock) -> bool` instead.
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    | After more consideration, I'm going to fold this into #115301, because it ultimately ties into some  | 
    
  Zalathar 
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      Sep 19, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all.
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 20, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all.
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 21, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all.
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 21, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all.
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 21, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all.
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 22, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all.
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 22, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all.
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 22, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 22, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 22, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 23, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 23, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 24, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 25, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 26, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 27, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 27, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 28, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 29, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Sep 30, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Oct 1, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Oct 1, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Oct 1, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Oct 2, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
    
  Zalathar 
      added a commit
        to Zalathar/rust
      that referenced
      this pull request
    
      Oct 3, 2023 
    
    
      
  
    
      
    
  
By encapsulating the coverage spans in a struct, we can change the internal representation without disturbing existing call sites. This will be useful for grouping coverage spans by BCB. This patch includes some changes that were originally in rust-lang#115912, which avoid the need for a particular test to deal with coverage spans at all. (Comments/logs referring to `CoverageSpan` are updated in a subsequent patch.)
  
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      Labels
      
    A-code-coverage
  Area: Source-based code coverage (-Cinstrument-coverage) 
  
    S-waiting-on-review
  Status: Awaiting review from the assignee but also interested parties. 
  
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This test calls internal functions in
spansin order to create a list of coverage spans to pass in when making BCB counters. That makes it difficult to modify those internals without breaking the test.However, making BCB counters doesn't require the actual coverage spans; it just needs some way to identify which BCBs are associated with one or more spans. This can be achieved by passing in a
Fn(BasicCoverageBlock) -> boolinstead.