diff options
Diffstat (limited to 'src/test/codegen/dst-vtable-align-nonzero.rs')
-rw-r--r-- | src/test/codegen/dst-vtable-align-nonzero.rs | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/src/test/codegen/dst-vtable-align-nonzero.rs b/src/test/codegen/dst-vtable-align-nonzero.rs deleted file mode 100644 index 14c4c3f30..000000000 --- a/src/test/codegen/dst-vtable-align-nonzero.rs +++ /dev/null @@ -1,45 +0,0 @@ -// compile-flags: -O - -#![crate_type = "lib"] - -// 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. - -pub trait Trait { - fn f(&self); -} - -pub struct WrapperWithAlign1<T: ?Sized> { x: u8, y: T } - -pub struct WrapperWithAlign2<T: ?Sized> { x: u16, y: T } - -pub struct Struct<W: ?Sized> { - _field: i8, - dst: W, -} - -// CHECK-LABEL: @eliminates_runtime_check_when_align_1 -#[no_mangle] -pub fn eliminates_runtime_check_when_align_1( - x: &Struct<WrapperWithAlign1<dyn Trait>> -) -> &WrapperWithAlign1<dyn Trait> { - // CHECK: load [[USIZE:i[0-9]+]], {{.+}} !range [[RANGE_META:![0-9]+]] - // CHECK-NOT: llvm.umax - // CHECK-NOT: icmp - // CHECK-NOT: select - // CHECK: ret - &x.dst -} - -// CHECK-LABEL: @does_not_eliminate_runtime_check_when_align_2 -#[no_mangle] -pub fn does_not_eliminate_runtime_check_when_align_2( - x: &Struct<WrapperWithAlign2<dyn Trait>> -) -> &WrapperWithAlign2<dyn Trait> { - // CHECK: [[X0:%[0-9]+]] = load [[USIZE]], {{.+}} !range [[RANGE_META]] - // CHECK: {{icmp|llvm.umax}} - // CHECK: ret - &x.dst -} - -// CHECK: [[RANGE_META]] = !{[[USIZE]] 1, [[USIZE]] 0} |