mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 06:51:58 +00:00
38 lines
1.7 KiB
Rust
38 lines
1.7 KiB
Rust
// Test that `-C instrument-coverage` injects Coverage statements. The Coverage Counter statements
|
|
// are later converted into LLVM instrprof.increment intrinsics, during codegen.
|
|
|
|
// unit-test: InstrumentCoverage
|
|
// needs-profiler-support
|
|
// ignore-windows
|
|
// compile-flags: -C instrument-coverage --remap-path-prefix={{src-base}}=/the/src
|
|
|
|
// EMIT_MIR instrument_coverage.main.InstrumentCoverage.diff
|
|
// EMIT_MIR instrument_coverage.bar.InstrumentCoverage.diff
|
|
fn main() {
|
|
loop {
|
|
if bar() {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
#[inline(never)]
|
|
fn bar() -> bool {
|
|
true
|
|
}
|
|
|
|
// Note that the MIR with injected coverage intrinsics includes references to source locations,
|
|
// including the source file absolute path. Typically, MIR pretty print output with file
|
|
// references are safe because the file prefixes are substituted with `$DIR`, but in this case
|
|
// the file references are encoded as function arguments, with an `Operand` type representation
|
|
// (`Slice` `Allocation` interned byte array) that cannot be normalized by simple substitution.
|
|
//
|
|
// The first workaround is to use the `SourceMap`-supported `--remap-path-prefix` option; however,
|
|
// the implementation of the `--remap-path-prefix` option currently joins the new prefix and the
|
|
// remaining source path with an OS-specific path separator (`\` on Windows). This difference still
|
|
// shows up in the byte array representation of the path, causing Windows tests to fail to match
|
|
// blessed results baselined with a `/` path separator.
|
|
//
|
|
// Since this `mir-opt` test does not have any significant platform dependencies, other than the
|
|
// path separator differences, the final workaround is to disable testing on Windows.
|