b41c232488
Same motivation as #136287, but for a newly introduced test. Rather than over-constraining here, we just match the sret and accept pretty much all other attributes. @rustbot label llvm-main r? @nikic
44 lines
1.2 KiB
Rust
44 lines
1.2 KiB
Rust
//@ compile-flags: -Copt-level=3
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// See https://github.com/rust-lang/rust/issues/135802
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#![crate_type = "lib"]
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enum Void {}
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// Should be ABI-compatible with T, but wasn't prior to the PR adding this test.
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#[repr(transparent)]
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struct NoReturn<T>(T, Void);
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// Returned by invisible reference (in most ABIs)
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#[allow(dead_code)]
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struct Large(u64, u64, u64);
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extern "Rust" {
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fn opaque() -> NoReturn<Large>;
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fn opaque_with_arg(rsi: u32) -> NoReturn<Large>;
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}
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// CHECK-LABEL: @test_uninhabited_ret_by_ref
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#[no_mangle]
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pub fn test_uninhabited_ret_by_ref() {
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// CHECK: %_1 = alloca [24 x i8], align {{8|4}}
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// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %_1)
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// CHECK-NEXT: call void @opaque({{.*}} sret([24 x i8]) {{.*}} %_1) #2
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// CHECK-NEXT: unreachable
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unsafe {
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opaque();
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}
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}
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// CHECK-LABEL: @test_uninhabited_ret_by_ref_with_arg
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#[no_mangle]
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pub fn test_uninhabited_ret_by_ref_with_arg(rsi: u32) {
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// CHECK: %_2 = alloca [24 x i8], align {{8|4}}
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// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %_2)
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// CHECK-NEXT: call void @opaque_with_arg({{.*}} sret([24 x i8]) {{.*}} %_2, i32 noundef %rsi) #2
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// CHECK-NEXT: unreachable
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unsafe {
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opaque_with_arg(rsi);
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}
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}
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