mirror of https://github.com/rust-lang/rust.git
68 lines
2.1 KiB
Rust
68 lines
2.1 KiB
Rust
//@ compile-flags: -O -Z randomize-layout=no
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//@ only-x86_64
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#![crate_type = "lib"]
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extern crate core;
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use core::num::NonZero;
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use core::option::Option;
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// CHECK-LABEL: @u64_opt_as_slice
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#[no_mangle]
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pub fn u64_opt_as_slice(o: &Option<u64>) -> &[u64] {
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// CHECK-NOT: select
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// CHECK-NOT: br
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// CHECK-NOT: switch
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// CHECK-NOT: icmp
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// CHECK: %[[LEN:.+]] = load i64,{{.+}} !range ![[META_U64:.+]], !noundef
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// CHECK-NOT: select
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// CHECK-NOT: br
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// CHECK-NOT: switch
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// CHECK-NOT: icmp
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// CHECK: %[[T0:.+]] = insertvalue { ptr, i64 } poison, ptr %{{.+}}, 0
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// CHECK-NEXT: %[[T1:.+]] = insertvalue { ptr, i64 } %[[T0]], i64 %[[LEN]], 1
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// CHECK-NEXT: ret { ptr, i64 } %[[T1]]
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o.as_slice()
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}
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// CHECK-LABEL: @nonzero_u64_opt_as_slice
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#[no_mangle]
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pub fn nonzero_u64_opt_as_slice(o: &Option<NonZero<u64>>) -> &[NonZero<u64>] {
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// CHECK-NOT: select
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// CHECK-NOT: br
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// CHECK-NOT: switch
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// CHECK-NOT: icmp
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// CHECK: %[[NZ:.+]] = icmp ne i64 %{{.+}}, 0
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// CHECK-NEXT: %[[LEN:.+]] = zext i1 %[[NZ]] to i64
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// CHECK-NOT: select
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// CHECK-NOT: br
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// CHECK-NOT: switch
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// CHECK-NOT: icmp
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// CHECK: %[[T0:.+]] = insertvalue { ptr, i64 } poison, ptr %o, 0
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// CHECK-NEXT: %[[T1:.+]] = insertvalue { ptr, i64 } %[[T0]], i64 %[[LEN]], 1
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// CHECK-NEXT: ret { ptr, i64 } %[[T1]]
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o.as_slice()
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}
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// CHECK-LABEL: @u8_opt_as_slice
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#[no_mangle]
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pub fn u8_opt_as_slice(o: &Option<u8>) -> &[u8] {
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// CHECK-NOT: select
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// CHECK-NOT: br
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// CHECK-NOT: switch
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// CHECK-NOT: icmp
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// CHECK: %[[TAG:.+]] = load i8,{{.+}} !range ![[META_U8:.+]], !noundef
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// CHECK: %[[LEN:.+]] = zext{{.*}} i8 %[[TAG]] to i64
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// CHECK-NOT: select
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// CHECK-NOT: br
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// CHECK-NOT: switch
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// CHECK-NOT: icmp
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// CHECK: %[[T0:.+]] = insertvalue { ptr, i64 } poison, ptr %{{.+}}, 0
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// CHECK-NEXT: %[[T1:.+]] = insertvalue { ptr, i64 } %[[T0]], i64 %[[LEN]], 1
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// CHECK-NEXT: ret { ptr, i64 } %[[T1]]
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o.as_slice()
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}
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// CHECK: ![[META_U64]] = !{i64 0, i64 2}
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// CHECK: ![[META_U8]] = !{i8 0, i8 2}
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