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Make source-based code coverage compatible with MIR inlining

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When codegenning code coverage use the instance that coverage data was
originally generated for, to ensure basic level of compatibility with
MIR inlining.
This commit is contained in:
Tomasz Miąsko
2021-03-13 00:00:00 +00:00
parent 107896c32d
commit 1796cc0e6c
7 changed files with 68 additions and 51 deletions
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2
compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs
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@@ -254,7 +254,7 @@ fn save_function_record(
///
/// 1. The file name of an "Unreachable" function must match the file name of the existing
/// codegenned (covered) function to which the unreachable code regions will be added.
/// 2. The function to which the unreachable code regions will be added must not be a genaric
/// 2. The function to which the unreachable code regions will be added must not be a generic
/// function (must not have type parameters) because the coverage tools will get confused
/// if the codegenned function has more than one instantiation and additional `CodeRegion`s
/// attached to only one of those instantiations.