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Add new -Z dump-mir-spanview option

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Similar to `-Z dump-mir-graphviz`, this adds the option to write
HTML+CSS files that allow users to analyze the spans associated with MIR
elements (by individual statement, just terminator, or overall basic
block).

This PR was split out from PR #76004, and exposes an API for spanview
HTML+CSS files that is also used to analyze code regions chosen for
coverage instrumentation (in a follow-on PR).

Rust compiler MCP rust-lang/compiler-team#278

Relevant issue: #34701 - Implement support for LLVMs code coverage
instrumentation
This commit is contained in:
Rich Kadel
2020-08-29 10:55:46 -07:00
parent 445f34bb14
commit 6b5869a0ae
11 changed files with 739 additions and 0 deletions
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compiler/rustc_mir/src/util/mod.rs
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@@ -9,6 +9,7 @@ mod alignment;
pub mod collect_writes;
mod graphviz;
pub(crate) mod pretty;
pub(crate) mod spanview;
pub use self::aggregate::expand_aggregate;
pub use self::alignment::is_disaligned;