mirror of https://github.com/rust-lang/rust
59 lines
1.2 KiB
Rust
59 lines
1.2 KiB
Rust
//@ assembly-output: emit-asm
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//@ only-x86_64
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//@ ignore-sgx
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//@ revisions: opt-speed opt-size
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//@ [opt-speed] compile-flags: -Copt-level=2 -Cdebug-assertions=no
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//@ [opt-size] compile-flags: -Copt-level=s -Cdebug-assertions=no
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#![crate_type="rlib"]
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#![feature(core_intrinsics)]
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#![feature(pointer_is_aligned_to)]
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// CHECK-LABEL: is_aligned_to_unchecked
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// CHECK: decq
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// CHECK-NEXT: testq
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// CHECK-NEXT: sete
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// CHECK: retq
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#[no_mangle]
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pub unsafe fn is_aligned_to_unchecked(ptr: *const u8, align: usize) -> bool {
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unsafe {
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std::intrinsics::assume(align.is_power_of_two())
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}
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ptr.is_aligned_to(align)
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}
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// CHECK-LABEL: is_aligned_1
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// CHECK: movb $1
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// CHECK: retq
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#[no_mangle]
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pub fn is_aligned_1(ptr: *const u8) -> bool {
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ptr.is_aligned()
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}
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// CHECK-LABEL: is_aligned_2
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// CHECK: testb $1
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// CHECK-NEXT: sete
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// CHECK: retq
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#[no_mangle]
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pub fn is_aligned_2(ptr: *const u16) -> bool {
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ptr.is_aligned()
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}
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// CHECK-LABEL: is_aligned_4
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// CHECK: testb $3
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// CHECK-NEXT: sete
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// CHECK: retq
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#[no_mangle]
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pub fn is_aligned_4(ptr: *const u32) -> bool {
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ptr.is_aligned()
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}
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// CHECK-LABEL: is_aligned_8
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// CHECK: testb $7
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// CHECK-NEXT: sete
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// CHECK: retq
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#[no_mangle]
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pub fn is_aligned_8(ptr: *const u64) -> bool {
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ptr.is_aligned()
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}
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