bjoernager/rust
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add range metadata to alignment loads

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This commit is contained in:
Ralf Jung 2022-07-20 10:45:09 -04:00
parent 399e020b96
commit 9cbd1066d7
1 changed files with 7 additions and 2 deletions
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9
compiler/rustc_codegen_ssa/src/mir/intrinsic.rs
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@ -9,7 +9,7 @@ use crate::MemFlags;
use rustc_middle::ty::{self, Ty, TyCtxt}; use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_span::{sym, Span}; use rustc_span::{sym, Span};
use rustc_target::abi::call::{FnAbi, PassMode}; use rustc_target::abi::{WrappingRange, call::{FnAbi, PassMode}};
fn copy_intrinsic<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( fn copy_intrinsic<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
bx: &mut Bx, bx: &mut Bx,
@ -110,7 +110,12 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
sym::vtable_align => ty::COMMON_VTABLE_ENTRIES_ALIGN, sym::vtable_align => ty::COMMON_VTABLE_ENTRIES_ALIGN,
_ => bug!(), _ => bug!(),
}; };
meth::VirtualIndex::from_index(idx).get_usize(bx, vtable) let value = meth::VirtualIndex::from_index(idx).get_usize(bx, vtable);
if name == sym::vtable_align {
// Alignment is always nonzero.
bx.range_metadata(value, WrappingRange { start: 1, end: !0 });
};
value
} }
sym::pref_align_of sym::pref_align_of
| sym::needs_drop | sym::needs_drop