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LLVM error: "Instruction does not dominate all uses!" on Windows #72470
Description
Code
Project is here: https://github.com/kryptan/llvm-error
Compile with cargo test --release on Windows-MSVC (compilation on Linux works fine).
src/lib.rs:
use std::future::Future;
use std::sync::Arc;
pub async fn run() {
foo(|| async { create() }).await;
foo(|| async { create() }).await;
}
async fn foo<F>(create: impl Fn() -> F)
where
F: Future<Output = Struct>,
{
call_empty::<()>(create().await, "").await;
}
struct Struct {
_vec: Vec<u8>,
_arc: Arc<()>,
}
fn create() -> Struct {
Struct {
_vec: Vec::new(),
_arc: Arc::new(()),
}
}
async fn call_empty<R>(_: Struct, _: &str) {
empty()
}
fn empty() {}tests/test.rs:
use std::future::Future;
#[test]
fn test() {
let _: Box<dyn Future<Output = ()>> = Box::new(llvm_eror::run());
}Meta
I tried two versions of the compiler (LLVM 9 & LLVM 10):
rustc --version --verbose:
rustc 1.45.0-nightly (9310e3bd4 2020-05-21)
binary: rustc
commit-hash: 9310e3bd4f425f84fc27878ebf2bda1f30935a63
commit-date: 2020-05-21
host: x86_64-pc-windows-msvc
release: 1.45.0-nightly
LLVM version: 10.0
rustc --version --verbose:
rustc 1.45.0-nightly (a74d1862d 2020-05-14)
binary: rustc
commit-hash: a74d1862d4d87a56244958416fd05976c58ca1a8
commit-date: 2020-05-14
host: x86_64-pc-windows-msvc
release: 1.45.0-nightly
LLVM version: 9.0
Error output
Instruction does not dominate all uses!
%117 = phi i8* [ %117, %111 ], [ %117, %105 ], [ %43, %60 ], [ %43, %58 ], [ %51, %56 ]
%117 = phi i8* [ %117, %111 ], [ %117, %105 ], [ %43, %60 ], [ %43, %58 ], [ %51, %56 ]
Instruction does not dominate all uses!
%117 = phi i8* [ %117, %111 ], [ %117, %105 ], [ %43, %60 ], [ %43, %58 ], [ %51, %56 ]
%117 = phi i8* [ %117, %111 ], [ %117, %105 ], [ %43, %60 ], [ %43, %58 ], [ %51, %56 ]
Instruction does not dominate all uses!
%228 = phi i8* [ %228, %222 ], [ %228, %216 ], [ %155, %171 ], [ %155, %169 ], [ %162, %167 ]
%228 = phi i8* [ %228, %222 ], [ %228, %216 ], [ %155, %171 ], [ %155, %169 ], [ %162, %167 ]
Instruction does not dominate all uses!
%228 = phi i8* [ %228, %222 ], [ %228, %216 ], [ %155, %171 ], [ %155, %169 ], [ %162, %167 ]
%228 = phi i8* [ %228, %222 ], [ %228, %216 ], [ %155, %171 ], [ %155, %169 ], [ %162, %167 ]
in function _ZN97_$LT$core..future..from_generator..GenFuture$LT$T$GT$$u20$as$u20$core..future..future..Future$GT$4poll17hf4840ccb0415d3e1E
LLVM ERROR: Broken function found, compilation aborted!
error: could not compile `llvm_eror`.
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Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Async & AwaitArea: Code generationAsync-await issues that have been triaged during a working group meeting.Category: This is a bug.Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable ExampleIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Toolchain: MSVC, Operating system: WindowsHigh priorityRelevant to the compiler team, which will review and decide on the PR/issue.Performance or correctness regression from stable to nightly.
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Activity
jonas-schievink commentedon May 22, 2020
Regression from rustc 1.45.0-nightly (bad3bf6 2020-05-09) to rustc 1.45.0-nightly (9912925 2020-05-10)
bad3bf6...9912925
Further bisection might be needed
jonas-schievink commentedon May 22, 2020
A smaller reproduction would be useful (if that's possible), marking needs-mcve
jonas-schievink commentedon May 23, 2020
@rustbot ping cleanup
37 remaining items
Aaron1011 commentedon Oct 2, 2020
A bisect shows that this was fixed by the upgrade to LLVM 11 in #73526. I'm going to try-relanding the original PR.
Add regression test for issue rust-lang#72470
tmandry commentedon Oct 6, 2020
Fixed by #77466.
Update windows CI toolchain to 1.48.0
Remove old Migrate API (#1475)