mirror of
https://github.com/rust-lang/rust
synced 2024-10-02 14:54:35 +00:00
e4a4064480
After 0d4a709bb8
LLVM now doesn't generate references to panic_cannot_unwind:
@nikic:
https://rust-lang.zulipchat.com/#narrow/stream/187780-t-compiler.2Fwg-llvm/topic/a.20couple.20codegen.20test.20failures.20after.20llvm.200d4a709bb876824a/near/342664944
>Okay, so LLVM now realizes that double panic is not possible, so that's fine.
53 lines
1.5 KiB
Rust
53 lines
1.5 KiB
Rust
// revisions: old new
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// LLVM 17 realizes double panic is not possible and doesn't generate calls
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// to panic_cannot_unwind.
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// [old]ignore-llvm-version: 17 - 99
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// [new]min-llvm-version: 17
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// compile-flags: -O
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// ignore-debug: the debug assertions get in the way
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#![crate_type = "lib"]
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#![feature(shrink_to)]
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// Make sure that `Vec::shrink_to_fit` never emits panics via `RawVec::shrink_to_fit`,
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// "Tried to shrink to a larger capacity", because the length is *always* <= capacity.
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// CHECK-LABEL: @shrink_to_fit
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#[no_mangle]
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pub fn shrink_to_fit(vec: &mut Vec<u32>) {
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// CHECK-NOT: panic
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vec.shrink_to_fit();
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}
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// CHECK-LABEL: @issue71861
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#[no_mangle]
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pub fn issue71861(vec: Vec<u32>) -> Box<[u32]> {
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// CHECK-NOT: panic
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// Call to panic_cannot_unwind in case of double-panic is expected
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// on LLVM 16 and older, but other panics are not.
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// CHECK: cleanup
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// old-NEXT: ; call core::panicking::panic_cannot_unwind
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// old-NEXT: panic_cannot_unwind
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// CHECK-NOT: panic
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vec.into_boxed_slice()
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}
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// CHECK-LABEL: @issue75636
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#[no_mangle]
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pub fn issue75636<'a>(iter: &[&'a str]) -> Box<[&'a str]> {
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// CHECK-NOT: panic
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// Call to panic_cannot_unwind in case of double-panic is expected,
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// on LLVM 16 and older, but other panics are not.
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// CHECK: cleanup
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// old-NEXT: ; call core::panicking::panic_cannot_unwind
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// old-NEXT: panic_cannot_unwind
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// CHECK-NOT: panic
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iter.iter().copied().collect()
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}
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// old: ; core::panicking::panic_cannot_unwind
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// old: declare void @{{.*}}panic_cannot_unwind
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