bjoernager/rust
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Treat undef bytes as equal to any other byte

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This commit is contained in:
Oli Scherer 2025-01-08 15:00:25 +00:00
parent 964c58a7d9
commit dfa4c01b2e
6 changed files with 40 additions and 7 deletions
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10
tests/codegen/slice-init.rs
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@ -2,6 +2,8 @@
#![crate_type = "lib"]
use std::mem::MaybeUninit;
// CHECK-LABEL: @zero_sized_elem
#[no_mangle]
pub fn zero_sized_elem() {
@ -76,16 +78,14 @@ pub fn u16_init_one_bytes() -> [u16; N] {
[const { u16::from_be_bytes([1, 1]) }; N]
}
// FIXME: undef bytes can just be initialized with the same value as the
// defined bytes, if the defines bytes are all the same.
// CHECK-LABEL: @option_none_init
#[no_mangle]
pub fn option_none_init() -> [Option<u8>; N] {
// CHECK-NOT: select
// CHECK: br label %repeat_loop_header{{.*}}
// CHECK-NOT: br
// CHECK-NOT: switch
// CHECK: icmp
// CHECK-NOT: call void @llvm.memset.p0
// CHECK-NOT: icmp
// CHECK: call void @llvm.memset.p0
[const { None }; N]
}