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Replace on-the-fly llvm field index calculation with cache

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This commit is contained in:
Hans Kratz 2021-07-19 09:27:18 +02:00
parent 60a523de92
commit e4106581de
2 changed files with 14 additions and 17 deletions
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6
compiler/rustc_codegen_llvm/src/context.rs
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@ -79,6 +79,11 @@ pub struct CodegenCx<'ll, 'tcx> {
pub pointee_infos: RefCell<FxHashMap<(Ty<'tcx>, Size), Option<PointeeInfo>>>,
pub isize_ty: &'ll Type,
/// Cache for the mapping from source index to llvm index for struct fields,
/// necessary because the mapping depends on padding and thus depens on
/// TyAndLayout.
pub field_projection_cache: RefCell<FxHashMap<TyAndLayout<'tcx>, Vec<u32>>>,
pub coverage_cx: Option<coverageinfo::CrateCoverageContext<'ll, 'tcx>>,
pub dbg_cx: Option<debuginfo::CrateDebugContext<'ll, 'tcx>>,
@ -308,6 +313,7 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
scalar_lltypes: Default::default(),
pointee_infos: Default::default(),
isize_ty,
field_projection_cache: Default::default(),
coverage_cx,
dbg_cx,
eh_personality: Cell::new(None),