mirror of https://github.com/rust-lang/rust
78 lines
2.7 KiB
Plaintext
78 lines
2.7 KiB
Plaintext
LL| |#![feature(coverage_attribute)]
|
|
LL| |//@ edition: 2021
|
|
LL| |//@ min-llvm-version: 18
|
|
LL| |//@ ignore-llvm-version: 19 - 99
|
|
LL| |//@ compile-flags: -Zcoverage-options=mcdc
|
|
LL| |//@ llvm-cov-flags: --show-branches=count --show-mcdc
|
|
LL| |
|
|
LL| |// Check that MC/DC instrumentation can gracefully handle conditions that
|
|
LL| |// exceed LLVM's limit of 6 conditions per decision.
|
|
LL| |//
|
|
LL| |// (The limit is enforced in `compiler/rustc_mir_build/src/build/coverageinfo/mcdc.rs`.)
|
|
LL| |
|
|
LL| 1|fn good() {
|
|
LL| 1| // With only 6 conditions, perform full MC/DC instrumentation.
|
|
LL| 1| let [a, b, c, d, e, f] = <[bool; 6]>::default();
|
|
LL| 1| if a && b && c && d && e && f {
|
|
^0 ^0 ^0 ^0 ^0
|
|
------------------
|
|
| Branch (LL:8): [True: 0, False: 1]
|
|
| Branch (LL:13): [True: 0, False: 0]
|
|
| Branch (LL:18): [True: 0, False: 0]
|
|
| Branch (LL:23): [True: 0, False: 0]
|
|
| Branch (LL:28): [True: 0, False: 0]
|
|
| Branch (LL:33): [True: 0, False: 0]
|
|
------------------
|
|
|---> MC/DC Decision Region (LL:8) to (LL:34)
|
|
|
|
|
| Number of Conditions: 6
|
|
| Condition C1 --> (LL:8)
|
|
| Condition C2 --> (LL:13)
|
|
| Condition C3 --> (LL:18)
|
|
| Condition C4 --> (LL:23)
|
|
| Condition C5 --> (LL:28)
|
|
| Condition C6 --> (LL:33)
|
|
|
|
|
| Executed MC/DC Test Vectors:
|
|
|
|
|
| C1, C2, C3, C4, C5, C6 Result
|
|
| 1 { F, -, -, -, -, - = F }
|
|
|
|
|
| C1-Pair: not covered
|
|
| C2-Pair: not covered
|
|
| C3-Pair: not covered
|
|
| C4-Pair: not covered
|
|
| C5-Pair: not covered
|
|
| C6-Pair: not covered
|
|
| MC/DC Coverage for Decision: 0.00%
|
|
|
|
|
------------------
|
|
LL| 0| core::hint::black_box("hello");
|
|
LL| 1| }
|
|
LL| 1|}
|
|
LL| |
|
|
LL| 1|fn bad() {
|
|
LL| 1| // With 7 conditions, fall back to branch instrumentation only.
|
|
LL| 1| let [a, b, c, d, e, f, g] = <[bool; 7]>::default();
|
|
LL| 1| if a && b && c && d && e && f && g {
|
|
^0 ^0 ^0 ^0 ^0 ^0
|
|
------------------
|
|
| Branch (LL:8): [True: 0, False: 1]
|
|
| Branch (LL:13): [True: 0, False: 0]
|
|
| Branch (LL:18): [True: 0, False: 0]
|
|
| Branch (LL:23): [True: 0, False: 0]
|
|
| Branch (LL:28): [True: 0, False: 0]
|
|
| Branch (LL:33): [True: 0, False: 0]
|
|
| Branch (LL:38): [True: 0, False: 0]
|
|
------------------
|
|
LL| 0| core::hint::black_box("hello");
|
|
LL| 1| }
|
|
LL| 1|}
|
|
LL| |
|
|
LL| |#[coverage(off)]
|
|
LL| |fn main() {
|
|
LL| | good();
|
|
LL| | bad();
|
|
LL| |}
|
|
|