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//===- annotations.go - annotation processor ------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file converts llgo annotations into attributes.
//
//===----------------------------------------------------------------------===//
package irgen
import (
"go/ast"
"go/token"
"llvm.org/llgo/third_party/gotools/go/loader"
"llvm.org/llgo/third_party/gotools/go/ssa"
"llvm.org/llgo/third_party/gotools/go/types"
"llvm.org/llvm/bindings/go/llvm"
)
// processAnnotations takes an *ssa.Package and a
// *importer.PackageInfo, and processes all of the
// llgo source annotations attached to each top-level
// function and global variable.
func (c *compiler) processAnnotations(u *unit, pkginfo *loader.PackageInfo) {
members := make(map[types.Object]llvm.Value, len(u.globals))
for k, v := range u.globals {
members[k.(ssa.Member).Object()] = v
}
applyAttributes := func(attrs []Attribute, idents ...*ast.Ident) {
if len(attrs) == 0 {
return
}
for _, ident := range idents {
if v := members[pkginfo.ObjectOf(ident)]; !v.IsNil() {
for _, attr := range attrs {
attr.Apply(v)
}
}
}
}
for _, f := range pkginfo.Files {
for _, decl := range f.Decls {
switch decl := decl.(type) {
case *ast.FuncDecl:
attrs := parseAttributes(decl.Doc)
applyAttributes(attrs, decl.Name)
case *ast.GenDecl:
if decl.Tok != token.VAR {
continue
}
for _, spec := range decl.Specs {
varspec := spec.(*ast.ValueSpec)
attrs := parseAttributes(decl.Doc)
applyAttributes(attrs, varspec.Names...)
}
}
}
}
}
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