forked from OSchip/llvm-project
64 lines
1.8 KiB
Go
64 lines
1.8 KiB
Go
//===- annotations.go - annotation processor ------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file converts llgo annotations into attributes.
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//
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//===----------------------------------------------------------------------===//
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package irgen
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import (
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"go/ast"
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"go/token"
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"llvm.org/llgo/third_party/gotools/go/loader"
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"llvm.org/llgo/third_party/gotools/go/ssa"
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"llvm.org/llgo/third_party/gotools/go/types"
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"llvm.org/llvm/bindings/go/llvm"
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)
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// processAnnotations takes an *ssa.Package and a
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// *importer.PackageInfo, and processes all of the
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// llgo source annotations attached to each top-level
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// function and global variable.
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func (c *compiler) processAnnotations(u *unit, pkginfo *loader.PackageInfo) {
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members := make(map[types.Object]llvm.Value, len(u.globals))
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for k, v := range u.globals {
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members[k.(ssa.Member).Object()] = v
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}
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applyAttributes := func(attrs []Attribute, idents ...*ast.Ident) {
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if len(attrs) == 0 {
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return
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}
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for _, ident := range idents {
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if v := members[pkginfo.ObjectOf(ident)]; !v.IsNil() {
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for _, attr := range attrs {
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attr.Apply(v)
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}
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}
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}
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}
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for _, f := range pkginfo.Files {
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for _, decl := range f.Decls {
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switch decl := decl.(type) {
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case *ast.FuncDecl:
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attrs := parseAttributes(decl.Doc)
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applyAttributes(attrs, decl.Name)
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case *ast.GenDecl:
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if decl.Tok != token.VAR {
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continue
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}
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for _, spec := range decl.Specs {
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varspec := spec.(*ast.ValueSpec)
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attrs := parseAttributes(decl.Doc)
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applyAttributes(attrs, varspec.Names...)
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}
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}
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}
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}
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}
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