diff options
Diffstat (limited to 'vendor/golang.org/x/tools/go/ssa/create.go')
| -rw-r--r-- | vendor/golang.org/x/tools/go/ssa/create.go | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/vendor/golang.org/x/tools/go/ssa/create.go b/vendor/golang.org/x/tools/go/ssa/create.go deleted file mode 100644 index 69ac12b..0000000 --- a/vendor/golang.org/x/tools/go/ssa/create.go +++ /dev/null @@ -1,263 +0,0 @@ -// Copyright 2013 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package ssa - -// This file implements the CREATE phase of SSA construction. -// See builder.go for explanation. - -import ( - "fmt" - "go/ast" - "go/token" - "go/types" - "os" - "sync" - - "golang.org/x/tools/go/types/typeutil" -) - -// NewProgram returns a new SSA Program. -// -// mode controls diagnostics and checking during SSA construction. -// -func NewProgram(fset *token.FileSet, mode BuilderMode) *Program { - prog := &Program{ - Fset: fset, - imported: make(map[string]*Package), - packages: make(map[*types.Package]*Package), - thunks: make(map[selectionKey]*Function), - bounds: make(map[*types.Func]*Function), - mode: mode, - } - - h := typeutil.MakeHasher() // protected by methodsMu, in effect - prog.methodSets.SetHasher(h) - prog.canon.SetHasher(h) - - return prog -} - -// memberFromObject populates package pkg with a member for the -// typechecker object obj. -// -// For objects from Go source code, syntax is the associated syntax -// tree (for funcs and vars only); it will be used during the build -// phase. -// -func memberFromObject(pkg *Package, obj types.Object, syntax ast.Node) { - name := obj.Name() - switch obj := obj.(type) { - case *types.Builtin: - if pkg.Pkg != types.Unsafe { - panic("unexpected builtin object: " + obj.String()) - } - - case *types.TypeName: - pkg.Members[name] = &Type{ - object: obj, - pkg: pkg, - } - - case *types.Const: - c := &NamedConst{ - object: obj, - Value: NewConst(obj.Val(), obj.Type()), - pkg: pkg, - } - pkg.values[obj] = c.Value - pkg.Members[name] = c - - case *types.Var: - g := &Global{ - Pkg: pkg, - name: name, - object: obj, - typ: types.NewPointer(obj.Type()), // address - pos: obj.Pos(), - } - pkg.values[obj] = g - pkg.Members[name] = g - - case *types.Func: - sig := obj.Type().(*types.Signature) - if sig.Recv() == nil && name == "init" { - pkg.ninit++ - name = fmt.Sprintf("init#%d", pkg.ninit) - } - fn := &Function{ - name: name, - object: obj, - Signature: sig, - syntax: syntax, - pos: obj.Pos(), - Pkg: pkg, - Prog: pkg.Prog, - } - if syntax == nil { - fn.Synthetic = "loaded from gc object file" - } - - pkg.values[obj] = fn - if sig.Recv() == nil { - pkg.Members[name] = fn // package-level function - } - - default: // (incl. *types.Package) - panic("unexpected Object type: " + obj.String()) - } -} - -// membersFromDecl populates package pkg with members for each -// typechecker object (var, func, const or type) associated with the -// specified decl. -// -func membersFromDecl(pkg *Package, decl ast.Decl) { - switch decl := decl.(type) { - case *ast.GenDecl: // import, const, type or var - switch decl.Tok { - case token.CONST: - for _, spec := range decl.Specs { - for _, id := range spec.(*ast.ValueSpec).Names { - if !isBlankIdent(id) { - memberFromObject(pkg, pkg.info.Defs[id], nil) - } - } - } - - case token.VAR: - for _, spec := range decl.Specs { - for _, id := range spec.(*ast.ValueSpec).Names { - if !isBlankIdent(id) { - memberFromObject(pkg, pkg.info.Defs[id], spec) - } - } - } - - case token.TYPE: - for _, spec := range decl.Specs { - id := spec.(*ast.TypeSpec).Name - if !isBlankIdent(id) { - memberFromObject(pkg, pkg.info.Defs[id], nil) - } - } - } - - case *ast.FuncDecl: - id := decl.Name - if !isBlankIdent(id) { - memberFromObject(pkg, pkg.info.Defs[id], decl) - } - } -} - -// CreatePackage constructs and returns an SSA Package from the -// specified type-checked, error-free file ASTs, and populates its -// Members mapping. -// -// importable determines whether this package should be returned by a -// subsequent call to ImportedPackage(pkg.Path()). -// -// The real work of building SSA form for each function is not done -// until a subsequent call to Package.Build(). -// -func (prog *Program) CreatePackage(pkg *types.Package, files []*ast.File, info *types.Info, importable bool) *Package { - p := &Package{ - Prog: prog, - Members: make(map[string]Member), - values: make(map[types.Object]Value), - Pkg: pkg, - info: info, // transient (CREATE and BUILD phases) - files: files, // transient (CREATE and BUILD phases) - } - - // Add init() function. - p.init = &Function{ - name: "init", - Signature: new(types.Signature), - Synthetic: "package initializer", - Pkg: p, - Prog: prog, - } - p.Members[p.init.name] = p.init - - // CREATE phase. - // Allocate all package members: vars, funcs, consts and types. - if len(files) > 0 { - // Go source package. - for _, file := range files { - for _, decl := range file.Decls { - membersFromDecl(p, decl) - } - } - } else { - // GC-compiled binary package (or "unsafe") - // No code. - // No position information. - scope := p.Pkg.Scope() - for _, name := range scope.Names() { - obj := scope.Lookup(name) - memberFromObject(p, obj, nil) - if obj, ok := obj.(*types.TypeName); ok { - if named, ok := obj.Type().(*types.Named); ok { - for i, n := 0, named.NumMethods(); i < n; i++ { - memberFromObject(p, named.Method(i), nil) - } - } - } - } - } - - if prog.mode&BareInits == 0 { - // Add initializer guard variable. - initguard := &Global{ - Pkg: p, - name: "init$guard", - typ: types.NewPointer(tBool), - } - p.Members[initguard.Name()] = initguard - } - - if prog.mode&GlobalDebug != 0 { - p.SetDebugMode(true) - } - - if prog.mode&PrintPackages != 0 { - printMu.Lock() - p.WriteTo(os.Stdout) - printMu.Unlock() - } - - if importable { - prog.imported[p.Pkg.Path()] = p - } - prog.packages[p.Pkg] = p - - return p -} - -// printMu serializes printing of Packages/Functions to stdout. -var printMu sync.Mutex - -// AllPackages returns a new slice containing all packages in the -// program prog in unspecified order. -// -func (prog *Program) AllPackages() []*Package { - pkgs := make([]*Package, 0, len(prog.packages)) - for _, pkg := range prog.packages { - pkgs = append(pkgs, pkg) - } - return pkgs -} - -// ImportedPackage returns the importable SSA Package whose import -// path is path, or nil if no such SSA package has been created. -// -// Not all packages are importable. For example, no import -// declaration can resolve to the x_test package created by 'go test' -// or the ad-hoc main package created 'go build foo.go'. -// -func (prog *Program) ImportedPackage(path string) *Package { - return prog.imported[path] -} |