Giant blob of minor changes

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / tools@v0.0.0-20201105173854-bc9fc8d8c4bc / go / ssa / ssautil / visit.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/ssa/ssautil/visit.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/ssa/ssautil/visit.go
new file mode 100644 (file)
index 0000000..3424e8a
--- /dev/null
+++ b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/ssa/ssautil/visit.go
@@ -0,0 +1,79 @@
+// 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 ssautil // import "golang.org/x/tools/go/ssa/ssautil"
+
+import "golang.org/x/tools/go/ssa"
+
+// This file defines utilities for visiting the SSA representation of
+// a Program.
+//
+// TODO(adonovan): test coverage.
+
+// AllFunctions finds and returns the set of functions potentially
+// needed by program prog, as determined by a simple linker-style
+// reachability algorithm starting from the members and method-sets of
+// each package.  The result may include anonymous functions and
+// synthetic wrappers.
+//
+// Precondition: all packages are built.
+//
+func AllFunctions(prog *ssa.Program) map[*ssa.Function]bool {
+       visit := visitor{
+               prog: prog,
+               seen: make(map[*ssa.Function]bool),
+       }
+       visit.program()
+       return visit.seen
+}
+
+type visitor struct {
+       prog *ssa.Program
+       seen map[*ssa.Function]bool
+}
+
+func (visit *visitor) program() {
+       for _, pkg := range visit.prog.AllPackages() {
+               for _, mem := range pkg.Members {
+                       if fn, ok := mem.(*ssa.Function); ok {
+                               visit.function(fn)
+                       }
+               }
+       }
+       for _, T := range visit.prog.RuntimeTypes() {
+               mset := visit.prog.MethodSets.MethodSet(T)
+               for i, n := 0, mset.Len(); i < n; i++ {
+                       visit.function(visit.prog.MethodValue(mset.At(i)))
+               }
+       }
+}
+
+func (visit *visitor) function(fn *ssa.Function) {
+       if !visit.seen[fn] {
+               visit.seen[fn] = true
+               var buf [10]*ssa.Value // avoid alloc in common case
+               for _, b := range fn.Blocks {
+                       for _, instr := range b.Instrs {
+                               for _, op := range instr.Operands(buf[:0]) {
+                                       if fn, ok := (*op).(*ssa.Function); ok {
+                                               visit.function(fn)
+                                       }
+                               }
+                       }
+               }
+       }
+}
+
+// MainPackages returns the subset of the specified packages
+// named "main" that define a main function.
+// The result may include synthetic "testmain" packages.
+func MainPackages(pkgs []*ssa.Package) []*ssa.Package {
+       var mains []*ssa.Package
+       for _, pkg := range pkgs {
+               if pkg.Pkg.Name() == "main" && pkg.Func("main") != nil {
+                       mains = append(mains, pkg)
+               }
+       }
+       return mains
+}