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| -rw-r--r-- | crates/hir-ty/src/consteval/tests/intrinsics.rs | 18 | ||||
| -rw-r--r-- | crates/hir-ty/src/mir/eval/shim.rs | 7 |
2 files changed, 25 insertions, 0 deletions
diff --git a/crates/hir-ty/src/consteval/tests/intrinsics.rs b/crates/hir-ty/src/consteval/tests/intrinsics.rs index b74133e24f..89f3a6d490 100644 --- a/crates/hir-ty/src/consteval/tests/intrinsics.rs +++ b/crates/hir-ty/src/consteval/tests/intrinsics.rs @@ -164,6 +164,24 @@ fn transmute() { } #[test] +fn read_via_copy() { + check_number( + r#" + extern "rust-intrinsic" { + pub fn read_via_copy<T>(e: *const T) -> T; + pub fn volatile_load<T>(e: *const T) -> T; + } + + const GOAL: i32 = { + let x = 2; + read_via_copy(&x) + volatile_load(&x) + }; + "#, + 4, + ); +} + +#[test] fn const_eval_select() { check_number( r#" diff --git a/crates/hir-ty/src/mir/eval/shim.rs b/crates/hir-ty/src/mir/eval/shim.rs index 6cdf9f03c9..8f22bb3656 100644 --- a/crates/hir-ty/src/mir/eval/shim.rs +++ b/crates/hir-ty/src/mir/eval/shim.rs @@ -888,6 +888,13 @@ impl Evaluator<'_> { } not_supported!("FnOnce was not available for executing const_eval_select"); } + "read_via_copy" | "volatile_load" => { + let [arg] = args else { + return Err(MirEvalError::TypeError("read_via_copy args are not provided")); + }; + let addr = Address::from_bytes(arg.interval.get(self)?)?; + destination.write_from_interval(self, Interval { addr, size: destination.size }) + } _ => not_supported!("unknown intrinsic {name}"), } } |