mirror of
https://github.com/rust-lang/rust
synced 2024-10-14 12:33:57 +00:00
72800d3b89
Except for `simd-intrinsic/`, which has a lot of files containing multiple types like `u8x64` which really are better when hand-formatted. There is a surprising amount of two-space indenting in this directory. Non-trivial changes: - `rustfmt::skip` needed in `debug-column.rs` to preserve meaning of the test. - `rustfmt::skip` used in a few places where hand-formatting read more nicely: `enum/enum-match.rs` - Line number adjustments needed for the expected output of `debug-column.rs` and `coroutine-debug.rs`.
83 lines
1.9 KiB
Rust
83 lines
1.9 KiB
Rust
//! This test checks that compiler don't generate useless compares to zeros
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//! for `NonZero` integer types.
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//!
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//@ compile-flags: -O --edition=2021 -Zmerge-functions=disabled
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//@ only-64bit (because the LLVM type of i64 for usize shows up)
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#![crate_type = "lib"]
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use core::num::NonZero;
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use core::ptr::NonNull;
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// CHECK-LABEL: @check_non_null
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#[no_mangle]
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pub fn check_non_null(x: NonNull<u8>) -> bool {
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// CHECK: ret i1 false
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x.as_ptr().is_null()
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}
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// CHECK-LABEL: @equals_zero_is_false_u8
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#[no_mangle]
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pub fn equals_zero_is_false_u8(x: NonZero<u8>) -> bool {
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// CHECK-NOT: br
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// CHECK: ret i1 false
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// CHECK-NOT: br
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x.get() == 0
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}
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// CHECK-LABEL: @not_equals_zero_is_true_u8
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#[no_mangle]
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pub fn not_equals_zero_is_true_u8(x: NonZero<u8>) -> bool {
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// CHECK-NOT: br
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// CHECK: ret i1 true
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// CHECK-NOT: br
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x.get() != 0
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}
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// CHECK-LABEL: @equals_zero_is_false_i8
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#[no_mangle]
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pub fn equals_zero_is_false_i8(x: NonZero<i8>) -> bool {
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// CHECK-NOT: br
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// CHECK: ret i1 false
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// CHECK-NOT: br
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x.get() == 0
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}
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// CHECK-LABEL: @not_equals_zero_is_true_i8
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#[no_mangle]
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pub fn not_equals_zero_is_true_i8(x: NonZero<i8>) -> bool {
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// CHECK-NOT: br
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// CHECK: ret i1 true
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// CHECK-NOT: br
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x.get() != 0
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}
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// CHECK-LABEL: @usize_try_from_u32
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#[no_mangle]
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pub fn usize_try_from_u32(x: NonZero<u32>) -> NonZero<usize> {
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// CHECK-NOT: br
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// CHECK: zext i32 %{{.*}} to i64
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// CHECK-NOT: br
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// CHECK: ret i64
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x.try_into().unwrap()
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}
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// CHECK-LABEL: @isize_try_from_i32
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#[no_mangle]
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pub fn isize_try_from_i32(x: NonZero<i32>) -> NonZero<isize> {
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// CHECK-NOT: br
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// CHECK: sext i32 %{{.*}} to i64
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// CHECK-NOT: br
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// CHECK: ret i64
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x.try_into().unwrap()
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}
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// CHECK-LABEL: @u64_from_nonzero_is_not_zero
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#[no_mangle]
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pub fn u64_from_nonzero_is_not_zero(x: NonZero<u64>) -> bool {
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// CHECK-NOT: br
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// CHECK: ret i1 false
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// CHECK-NOT: br
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let v: u64 = x.into();
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v == 0
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}
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