Giant blob of minor changes

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / honnef.co / go / tools@v0.0.1-2020.1.5 / internal / cmd / irdump / main.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/honnef.co/go/tools@v0.0.1-2020.1.5/internal/cmd/irdump/main.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/honnef.co/go/tools@v0.0.1-2020.1.5/internal/cmd/irdump/main.go
new file mode 100644 (file)
index 0000000..8727715
--- /dev/null
+++ b/.config/coc/extensions/coc-go-data/tools/pkg/mod/honnef.co/go/tools@v0.0.1-2020.1.5/internal/cmd/irdump/main.go
@@ -0,0 +1,121 @@
+// 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.
+
+// irdump: a tool for displaying the IR form of Go programs.
+package main
+
+import (
+       "flag"
+       "fmt"
+       "go/build"
+       "os"
+       "runtime/pprof"
+
+       "golang.org/x/tools/go/buildutil"
+       "golang.org/x/tools/go/packages"
+       "honnef.co/go/tools/ir"
+       "honnef.co/go/tools/ir/irutil"
+)
+
+// flags
+var (
+       mode       = ir.BuilderMode(ir.PrintPackages | ir.PrintFunctions)
+       testFlag   = flag.Bool("test", false, "include implicit test packages and executables")
+       cpuprofile = flag.String("cpuprofile", "", "write cpu profile to file")
+       dot        bool
+       html       string
+)
+
+func init() {
+       flag.Var(&mode, "build", ir.BuilderModeDoc)
+       flag.Var((*buildutil.TagsFlag)(&build.Default.BuildTags), "tags", buildutil.TagsFlagDoc)
+       flag.BoolVar(&dot, "dot", false, "Print Graphviz dot of CFG")
+       flag.StringVar(&html, "html", "", "Print HTML for 'function'")
+}
+
+const usage = `IR builder.
+Usage: irdump [-build=[DBCSNFL]] [-test] [-arg=...] package...
+Use -help flag to display options.
+
+Examples:
+% irdump -build=F hello.go              # dump IR form of a single package
+% irdump -build=F -test fmt             # dump IR form of a package and its tests
+`
+
+func main() {
+       if err := doMain(); err != nil {
+               fmt.Fprintf(os.Stderr, "irdump: %s\n", err)
+               os.Exit(1)
+       }
+}
+
+func doMain() error {
+       flag.Parse()
+       if len(flag.Args()) == 0 {
+               fmt.Fprint(os.Stderr, usage)
+               os.Exit(1)
+       }
+
+       cfg := &packages.Config{
+               Mode:  packages.NeedName | packages.NeedFiles | packages.NeedCompiledGoFiles | packages.NeedImports | packages.NeedDeps | packages.NeedTypes | packages.NeedTypesSizes | packages.NeedSyntax | packages.NeedTypesInfo,
+               Tests: *testFlag,
+       }
+
+       // Profiling support.
+       if *cpuprofile != "" {
+               f, err := os.Create(*cpuprofile)
+               if err != nil {
+                       fmt.Fprintln(os.Stderr, err)
+                       os.Exit(1)
+               }
+               pprof.StartCPUProfile(f)
+               defer pprof.StopCPUProfile()
+       }
+
+       // Load, parse and type-check the initial packages.
+       initial, err := packages.Load(cfg, flag.Args()...)
+       if err != nil {
+               return err
+       }
+       if len(initial) == 0 {
+               return fmt.Errorf("no packages")
+       }
+       if packages.PrintErrors(initial) > 0 {
+               return fmt.Errorf("packages contain errors")
+       }
+
+       // Create IR-form program representation.
+       _, pkgs := irutil.Packages(initial, mode, &irutil.Options{PrintFunc: html})
+
+       for i, p := range pkgs {
+               if p == nil {
+                       return fmt.Errorf("cannot build IR for package %s", initial[i])
+               }
+       }
+
+       // Build and display only the initial packages
+       // (and synthetic wrappers).
+       for _, p := range pkgs {
+               p.Build()
+       }
+
+       if dot {
+               for _, p := range pkgs {
+                       for _, m := range p.Members {
+                               if fn, ok := m.(*ir.Function); ok {
+                                       fmt.Println("digraph{")
+                                       fmt.Printf("label = %q;\n", fn.Name())
+                                       for _, b := range fn.Blocks {
+                                               fmt.Printf("n%d [label=\"%d: %s\"]\n", b.Index, b.Index, b.Comment)
+                                               for _, succ := range b.Succs {
+                                                       fmt.Printf("n%d -> n%d\n", b.Index, succ.Index)
+                                               }
+                                       }
+                                       fmt.Println("}")
+                               }
+                       }
+               }
+       }
+       return nil
+}