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3141177995
The output of these tests is too complicated to comfortably verify by hand, but we can still use them to observe changes to the underlying mappings produced by codegen/LLVM. If these tests fail due to non-coverage changes (e.g. in HIR-to-MIR lowering or MIR optimizations), it should usually be OK to just `--bless` them, as long as the `run-coverage` test suite still works.
47 lines
1.4 KiB
Rust
47 lines
1.4 KiB
Rust
// This test confirms an earlier problem was resolved, supporting the MIR graph generated by the
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// structure of this test.
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#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
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pub struct Version {
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major: usize,
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minor: usize,
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patch: usize,
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}
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impl Version {
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pub fn new(major: usize, minor: usize, patch: usize) -> Self {
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Self {
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major,
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minor,
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patch,
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}
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}
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}
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fn main() {
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let version_3_2_1 = Version::new(3, 2, 1);
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let version_3_3_0 = Version::new(3, 3, 0);
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println!("{:?} < {:?} = {}", version_3_2_1, version_3_3_0, version_3_2_1 < version_3_3_0);
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}
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/*
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This test verifies a bug was fixed that otherwise generated this error:
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thread 'rustc' panicked at 'No counters provided the source_hash for function:
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Instance {
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def: Item(WithOptConstParam {
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did: DefId(0:101 ~ autocfg[c44a]::version::{impl#2}::partial_cmp),
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const_param_did: None
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}),
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args: []
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}'
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The `PartialOrd` derived by `Version` happened to generate a MIR that generated coverage
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without a code region associated with any `Counter`. Code regions were associated with at least
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one expression, which is allowed, but the `function_source_hash` was only passed to the codegen
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(coverage mapgen) phase from a `Counter`s code region. A new method was added to pass the
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`function_source_hash` without a code region, if necessary.
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*/
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