nr2.0: Separate out canonical path handling #3776
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This should improve our canonical path handling, without requiring further tweaks to ForeverStack. This may also help if, in the future, we have to move canonical path calculation to later compilation phases for proper handling of generics. gcc/rust/ChangeLog: * backend/rust-compile-base.cc (HIRCompileBase::compile_function): Since canonical paths returned from nr2.0 now include the crate name, avoid prepending the crate name again. * backend/rust-compile-implitem.cc (CompileTraitItem::visit): Use NameResolutionContext::to_canonical_path instead of ForeverStack::to_canonical_path. * backend/rust-compile-item.cc (CompileItem::visit): Likewise. * typecheck/rust-hir-type-check-enumitem.cc (TypeCheckEnumItem::visit): Likewise. * typecheck/rust-hir-type-check-implitem.cc (TypeCheckImplItem::visit): Likewise. * typecheck/rust-hir-type-check-item.cc (TypeCheckItem::visit): Likewise. * typecheck/rust-hir-type-check.cc (TraitItemReference::get_type_from_fn): Likewise. * resolve/rust-default-resolver.cc (DefaultResolver::visit): Add Crate and EnumItem instance visitors, handle canonical path context scoping. * resolve/rust-default-resolver.h (DefaultResolver::visit): Add Crate and EnumItem instance visitors. * resolve/rust-early-name-resolver-2.0.cc (Early::go): Visit instances of Crate using the virtual member function visit. * resolve/rust-forever-stack.h (ForeverStack::to_canonical_path): Remove function declaration. * resolve/rust-forever-stack.hxx (ForeverStack::to_canonical_path): Remove function definition. * resolve/rust-late-name-resolver-2.0.cc (Late::go): Visit instances of Crate using the virtual member function visit. * resolve/rust-name-resolution-context.cc (CanonicalPathRecordRoot::as_path): New function definition. (CanonicalPathRecordNormal::as_path): Likewise. (CanonicalPathRecordLookup::as_path): Likewise. (CanonicalPathRecordImpl::as_path): Likewise. (CanonicalPathRecordTraitImpl::as_path): Likewise. (NameResolutionContext::NameResolutionContext): Initialize member variable canonical_ctx. * resolve/rust-name-resolution-context.h: Include "rust-item.h". (class NameResolutionContext): Forward declare class. (class CanonicalPathRecord): New class. (class CanonicalPathRecordWithParent): Likewise. (class CanonicalPathRecordRoot): Likewise. (class CanonicalPathRecordNormal): Likewise. (class CanonicalPathRecordLookup): Likewise. (class CanonicalPathRecordImpl): Likewise. (class CanonicalPathRecordTraitImpl): Likewise. (class CanonicalPathCtx): Likewise. (NameResolutionContext::canonical_ctx): New member variable. (NameResolutionContext::to_canonical_path): New member function. * resolve/rust-toplevel-name-resolver-2.0.cc (TopLevel::go): Visit instances of Crate with the virtual member function visit. (TopLevel::visit): Handle canonical path context scoping for external crates, use DefaultResolver::visit when visiting instances of StructStruct. * util/rust-canonical-path.h (CanonicalPath::new_seg): Take path parameter by-value, as a duplicate instance will be constructed regardless. gcc/testsuite/ChangeLog: * rust/compile/nr2/exclude: Remove canonical_paths1.rs.
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Depends on a few other PRs