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00bfd702dc
Disable the tests and generate an error if MC/DC is used on LLVM 19. The support will be ported separately, as it is substantially different on LLVM 19, and there are no plans to support both versions.
34 lines
922 B
Rust
34 lines
922 B
Rust
#![feature(coverage_attribute)]
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//@ edition: 2021
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//@ min-llvm-version: 18
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//@ ignore-llvm-version: 19 - 99
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//@ compile-flags: -Zcoverage-options=mcdc
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//@ llvm-cov-flags: --show-branches=count --show-mcdc
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// Check that MC/DC instrumentation can gracefully handle conditions that
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// exceed LLVM's limit of 6 conditions per decision.
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//
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// (The limit is enforced in `compiler/rustc_mir_build/src/build/coverageinfo/mcdc.rs`.)
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fn good() {
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// With only 6 conditions, perform full MC/DC instrumentation.
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let [a, b, c, d, e, f] = <[bool; 6]>::default();
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if a && b && c && d && e && f {
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core::hint::black_box("hello");
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}
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}
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fn bad() {
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// With 7 conditions, fall back to branch instrumentation only.
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let [a, b, c, d, e, f, g] = <[bool; 7]>::default();
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if a && b && c && d && e && f && g {
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core::hint::black_box("hello");
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}
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}
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#[coverage(off)]
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fn main() {
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good();
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bad();
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}
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