diff options
Diffstat (limited to 'src/test/codegen/dst-vtable-align-nonzero.rs')
| -rw-r--r-- | src/test/codegen/dst-vtable-align-nonzero.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/codegen/dst-vtable-align-nonzero.rs b/src/test/codegen/dst-vtable-align-nonzero.rs index 14c4c3f30f9..7ebb4173d56 100644 --- a/src/test/codegen/dst-vtable-align-nonzero.rs +++ b/src/test/codegen/dst-vtable-align-nonzero.rs @@ -1,6 +1,7 @@ // compile-flags: -O #![crate_type = "lib"] +#![feature(core_intrinsics)] // This test checks that we annotate alignment loads from vtables with nonzero range metadata, // and that this allows LLVM to eliminate redundant `align >= 1` checks. @@ -42,4 +43,21 @@ pub fn does_not_eliminate_runtime_check_when_align_2( &x.dst } +// CHECK-LABEL: @align_load_from_align_of_val +#[no_mangle] +pub fn align_load_from_align_of_val(x: &dyn Trait) -> usize { + // CHECK: {{%[0-9]+}} = load [[USIZE]], {{.+}} !range [[RANGE_META]] + core::mem::align_of_val(x) +} + +// CHECK-LABEL: @align_load_from_vtable_align_intrinsic +#[no_mangle] +pub unsafe fn align_load_from_vtable_align_intrinsic(x: &dyn Trait) -> usize { + let (data, vtable): (*const (), *const ()) = core::mem::transmute(x); + // CHECK: {{%[0-9]+}} = load [[USIZE]], {{.+}} !range [[RANGE_META]] + let align = core::intrinsics::vtable_align(vtable); + // make this function unique so it doesn't get merged with the previous + align + 1 +} + // CHECK: [[RANGE_META]] = !{[[USIZE]] 1, [[USIZE]] 0} |