Index: llvm/tools/llvm-go/CMakeLists.txt
===================================================================
--- llvm/tools/llvm-go/CMakeLists.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-if(LLVM_BINDINGS MATCHES "go")
-  set(binpath ${CMAKE_BINARY_DIR}/bin/llvm-go${CMAKE_EXECUTABLE_SUFFIX})
-  add_custom_command(OUTPUT ${binpath}
-    COMMAND ${GO_EXECUTABLE} build -o ${binpath} llvm-go.go
-    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/llvm-go.go
-    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-    COMMENT "Building Go executable llvm-go")
-  add_custom_target(llvm-go ALL DEPENDS ${binpath})
-endif()
Index: llvm/tools/llvm-go/llvm-go.go
===================================================================
--- llvm/tools/llvm-go/llvm-go.go
+++ /dev/null
@@ -1,315 +0,0 @@
-//===-- llvm-go.go - go tool wrapper for LLVM -----------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This tool lets us build LLVM components within the tree by setting up a
-// $GOPATH that resembles a tree fetched in the normal way with "go get".
-//
-//===----------------------------------------------------------------------===//
-
-package main
-
-import (
-	"fmt"
-	"io/ioutil"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"runtime"
-	"strings"
-)
-
-const (
-	linkmodeComponentLibs = "component-libs"
-	linkmodeDylib         = "dylib"
-)
-
-type pkg struct {
-	llvmpath, pkgpath string
-}
-
-var packages = []pkg{
-	{"bindings/go/llvm", "llvm.org/llvm/bindings/go/llvm"},
-}
-
-type compilerFlags struct {
-	cpp, cxx, ld string
-}
-
-var components = []string{
-	"all-targets",
-	"analysis",
-	"asmparser",
-	"asmprinter",
-	"bitreader",
-	"bitwriter",
-	"codegen",
-	"core",
-	"coroutines",
-	"debuginfodwarf",
-	"executionengine",
-	"instrumentation",
-	"interpreter",
-	"ipo",
-	"irreader",
-	"linker",
-	"mc",
-	"mcjit",
-	"objcarcopts",
-	"option",
-	"profiledata",
-	"scalaropts",
-	"support",
-	"target",
-}
-
-func llvmConfig(args ...string) string {
-	configpath := os.Getenv("LLVM_CONFIG")
-	if configpath == "" {
-		bin, _ := filepath.Split(os.Args[0])
-		configpath = filepath.Join(bin, "llvm-config")
-	}
-
-	cmd := exec.Command(configpath, args...)
-	cmd.Stderr = os.Stderr
-	out, err := cmd.Output()
-	if err != nil {
-		panic(err.Error())
-	}
-
-	outstr := string(out)
-	outstr = strings.TrimSuffix(outstr, "\n")
-	outstr = strings.Replace(outstr, "\n", " ", -1)
-	return outstr
-}
-
-func llvmFlags() compilerFlags {
-	args := append([]string{"--ldflags", "--libs", "--system-libs"}, components...)
-	ldflags := llvmConfig(args...)
-	stdLibOption := ""
-	if strings.Contains(llvmConfig("--cxxflags"), "-stdlib=libc++") {
-		// If libc++ is used to build LLVM libraries, -stdlib=libc++ is
-		// needed to resolve dependent symbols
-		stdLibOption = "-stdlib=libc++"
-	}
-	if runtime.GOOS == "aix" {
-		// AIX linker does not honour `-rpath`, the closest substitution
-		// is `-blibpath`
-		ldflags = "-Wl,-blibpath:" + llvmConfig("--libdir") + " " + ldflags
-	} else if runtime.GOOS != "darwin" {
-		// OS X doesn't like -rpath with cgo. See:
-		// https://github.com/golang/go/issues/7293
-		ldflags = "-Wl,-rpath," + llvmConfig("--libdir") + " " + ldflags
-	}
-	return compilerFlags{
-		cpp: llvmConfig("--cppflags"),
-		cxx: "-std=c++14" + " " + stdLibOption,
-		ld:  ldflags,
-	}
-}
-
-func addTag(args []string, tag string) []string {
-	args = append([]string{}, args...)
-	addedTag := false
-	for i, a := range args {
-		if strings.HasPrefix(a, "-tags=") {
-			args[i] = a + " " + tag
-			addedTag = true
-		} else if a == "-tags" && i+1 < len(args) {
-			args[i+1] = args[i+1] + " " + tag
-			addedTag = true
-		}
-	}
-	if !addedTag {
-		args = append([]string{args[0], "-tags", tag}, args[1:]...)
-	}
-	return args
-}
-
-func printComponents() {
-	fmt.Println(strings.Join(components, " "))
-}
-
-func printConfig() {
-	flags := llvmFlags()
-
-	fmt.Printf(`// +build !byollvm
-
-// This file is generated by llvm-go, do not edit.
-
-package llvm
-
-/*
-#cgo CPPFLAGS: %s
-#cgo CXXFLAGS: %s
-#cgo LDFLAGS: %s
-*/
-import "C"
-
-type (run_build_sh int)
-`, flags.cpp, flags.cxx, flags.ld)
-}
-
-func runGoWithLLVMEnv(args []string, cc, cxx, gocmd, llgo, cppflags, cxxflags, ldflags string, packages []pkg) {
-	args = addTag(args, "byollvm")
-
-	srcdir := llvmConfig("--src-root")
-
-	tmpgopath, err := ioutil.TempDir("", "gopath")
-	if err != nil {
-		panic(err.Error())
-	}
-
-	for _, p := range packages {
-		path := filepath.Join(tmpgopath, "src", p.pkgpath)
-		err := os.MkdirAll(filepath.Dir(path), os.ModePerm)
-		if err != nil {
-			panic(err.Error())
-		}
-
-		abspath := p.llvmpath
-		if !filepath.IsAbs(abspath) {
-			abspath = filepath.Join(srcdir, abspath)
-		}
-
-		err = os.Symlink(abspath, path)
-		if err != nil {
-			panic(err.Error())
-		}
-	}
-
-	newpath := os.Getenv("PATH")
-
-	newgopathlist := []string{tmpgopath}
-	newgopathlist = append(newgopathlist, filepath.SplitList(os.Getenv("GOPATH"))...)
-	newgopath := strings.Join(newgopathlist, string(filepath.ListSeparator))
-
-	flags := llvmFlags()
-
-	newenv := []string{
-		"CC=" + cc,
-		"CXX=" + cxx,
-		"CGO_CPPFLAGS=" + flags.cpp + " " + cppflags,
-		"CGO_CXXFLAGS=" + flags.cxx + " " + cxxflags,
-		"CGO_LDFLAGS=" + flags.ld + " " + ldflags,
-		"GOPATH=" + newgopath,
-		"PATH=" + newpath,
-	}
-	if llgo != "" {
-		newenv = append(newenv, "GCCGO="+llgo)
-	}
-
-	for _, v := range os.Environ() {
-		if !strings.HasPrefix(v, "CC=") &&
-			!strings.HasPrefix(v, "CXX=") &&
-			!strings.HasPrefix(v, "CGO_CPPFLAGS=") &&
-			!strings.HasPrefix(v, "CGO_CXXFLAGS=") &&
-			!strings.HasPrefix(v, "CGO_LDFLAGS=") &&
-			!strings.HasPrefix(v, "GCCGO=") &&
-			!strings.HasPrefix(v, "GOPATH=") &&
-			!strings.HasPrefix(v, "PATH=") {
-			newenv = append(newenv, v)
-		}
-	}
-
-	gocmdpath, err := exec.LookPath(gocmd)
-	if err != nil {
-		panic(err.Error())
-	}
-
-	proc, err := os.StartProcess(gocmdpath, append([]string{gocmd}, args...),
-		&os.ProcAttr{
-			Env:   newenv,
-			Files: []*os.File{os.Stdin, os.Stdout, os.Stderr},
-		})
-	if err != nil {
-		panic(err.Error())
-	}
-	ps, err := proc.Wait()
-	if err != nil {
-		panic(err.Error())
-	}
-
-	os.RemoveAll(tmpgopath)
-
-	if !ps.Success() {
-		os.Exit(1)
-	}
-}
-
-func usage() {
-	fmt.Println(`Usage: llvm-go subcommand [flags]
-
-Available subcommands: build get install run test print-components print-config`)
-	os.Exit(0)
-}
-
-func main() {
-	cc := os.Getenv("CC")
-	cxx := os.Getenv("CXX")
-	cppflags := os.Getenv("CGO_CPPFLAGS")
-	cxxflags := os.Getenv("CGO_CXXFLAGS")
-	ldflags := os.Getenv("CGO_LDFLAGS")
-	gocmd := "go"
-	llgo := ""
-	packagesString := ""
-
-	flags := []struct {
-		name string
-		dest *string
-	}{
-		{"cc", &cc},
-		{"cxx", &cxx},
-		{"go", &gocmd},
-		{"llgo", &llgo},
-		{"cppflags", &cppflags},
-		{"ldflags", &ldflags},
-		{"packages", &packagesString},
-	}
-
-	args := os.Args[1:]
-LOOP:
-	for {
-		if len(args) == 0 {
-			usage()
-		}
-		for _, flag := range flags {
-			if strings.HasPrefix(args[0], flag.name+"=") {
-				*flag.dest = args[0][len(flag.name)+1:]
-				args = args[1:]
-				continue LOOP
-			}
-		}
-		break
-	}
-
-	packages := packages
-	if packagesString != "" {
-		for _, field := range strings.Fields(packagesString) {
-			pos := strings.IndexRune(field, '=')
-			if pos == -1 {
-				fmt.Fprintf(os.Stderr, "invalid packages value %q, expected 'pkgpath=llvmpath [pkgpath=llvmpath ...]'\n", packagesString)
-				os.Exit(1)
-			}
-			packages = append(packages, pkg{
-				pkgpath:  field[:pos],
-				llvmpath: field[pos+1:],
-			})
-		}
-	}
-
-	switch args[0] {
-	case "build", "get", "install", "run", "test":
-		runGoWithLLVMEnv(args, cc, cxx, gocmd, llgo, cppflags, cxxflags, ldflags, packages)
-	case "print-components":
-		printComponents()
-	case "print-config":
-		printConfig()
-	default:
-		usage()
-	}
-}