1 files changed, 0 insertions, 151 deletions
diff --git a/src/cmd/internal/objabi/exp.go b/src/cmd/internal/objabi/exp.go
deleted file mode 100644
index 3371c6c8f8..0000000000
--- a/src/cmd/internal/objabi/exp.go
+++ /dev/null
@@ -1,151 +0,0 @@
-// Copyright 2021 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 objabi
-
-import (
-	"fmt"
-	"os"
-	"reflect"
-	"strings"
-
-	"internal/goexperiment"
-)
-
-// Experiment contains the toolchain experiments enabled for the
-// current build.
-//
-// (This is not necessarily the set of experiments the compiler itself
-// was built with.)
-var Experiment goexperiment.Flags = parseExperiments()
-
-// experimentBaseline specifies the experiment flags that are enabled by
-// default in the current toolchain. This is, in effect, the "control"
-// configuration and any variation from this is an experiment.
-var experimentBaseline goexperiment.Flags
-
-// FramePointerEnabled enables the use of platform conventions for
-// saving frame pointers.
-//
-// This used to be an experiment, but now it's always enabled on
-// platforms that support it.
-//
-// Note: must agree with runtime.framepointer_enabled.
-var FramePointerEnabled = GOARCH == "amd64" || GOARCH == "arm64"
-
-func parseExperiments() goexperiment.Flags {
-	// Start with the statically enabled set of experiments.
-	flags := experimentBaseline
-
-	// Pick up any changes to the baseline configuration from the
-	// GOEXPERIMENT environment. This can be set at make.bash time
-	// and overridden at build time.
-	env := envOr("GOEXPERIMENT", defaultGOEXPERIMENT)
-
-	if env != "" {
-		// Create a map of known experiment names.
-		names := make(map[string]reflect.Value)
-		rv := reflect.ValueOf(&flags).Elem()
-		rt := rv.Type()
-		for i := 0; i < rt.NumField(); i++ {
-			field := rv.Field(i)
-			names[strings.ToLower(rt.Field(i).Name)] = field
-		}
-
-		// Parse names.
-		for _, f := range strings.Split(env, ",") {
-			if f == "" {
-				continue
-			}
-			if f == "none" {
-				// GOEXPERIMENT=none disables all experiment flags.
-				// This is used by cmd/dist, which doesn't know how
-				// to build with any experiment flags.
-				flags = goexperiment.Flags{}
-				continue
-			}
-			val := true
-			if strings.HasPrefix(f, "no") {
-				f, val = f[2:], false
-			}
-			field, ok := names[f]
-			if !ok {
-				fmt.Printf("unknown experiment %s\n", f)
-				os.Exit(2)
-			}
-			field.SetBool(val)
-		}
-	}
-
-	// regabi is only supported on amd64.
-	if GOARCH != "amd64" {
-		flags.Regabi = false
-		flags.RegabiWrappers = false
-		flags.RegabiG = false
-		flags.RegabiReflect = false
-		flags.RegabiDefer = false
-		flags.RegabiArgs = false
-	}
-	// Setting regabi sets working sub-experiments.
-	if flags.Regabi {
-		flags.RegabiWrappers = true
-		flags.RegabiG = true
-		flags.RegabiReflect = true
-		flags.RegabiDefer = true
-		// Not ready yet:
-		//flags.RegabiArgs = true
-	}
-	// Check regabi dependencies.
-	if flags.RegabiG && !flags.RegabiWrappers {
-		panic("GOEXPERIMENT regabig requires regabiwrappers")
-	}
-	if flags.RegabiArgs && !(flags.RegabiWrappers && flags.RegabiG && flags.RegabiReflect && flags.RegabiDefer) {
-		panic("GOEXPERIMENT regabiargs requires regabiwrappers,regabig,regabireflect,regabidefer")
-	}
-	return flags
-}
-
-// expList returns the list of lower-cased experiment names for
-// experiments that differ from base. base may be nil to indicate no
-// experiments. If all is true, then include all experiment flags,
-// regardless of base.
-func expList(exp, base *goexperiment.Flags, all bool) []string {
-	var list []string
-	rv := reflect.ValueOf(exp).Elem()
-	var rBase reflect.Value
-	if base != nil {
-		rBase = reflect.ValueOf(base).Elem()
-	}
-	rt := rv.Type()
-	for i := 0; i < rt.NumField(); i++ {
-		name := strings.ToLower(rt.Field(i).Name)
-		val := rv.Field(i).Bool()
-		baseVal := false
-		if base != nil {
-			baseVal = rBase.Field(i).Bool()
-		}
-		if all || val != baseVal {
-			if val {
-				list = append(list, name)
-			} else {
-				list = append(list, "no"+name)
-			}
-		}
-	}
-	return list
-}
-
-// GOEXPERIMENT is a comma-separated list of enabled or disabled
-// experiments that differ from the baseline experiment configuration.
-// GOEXPERIMENT is exactly what a user would set on the command line
-// to get the set of enabled experiments.
-func GOEXPERIMENT() string {
-	return strings.Join(expList(&Experiment, &experimentBaseline, false), ",")
-}
-
-// EnabledExperiments returns a list of enabled experiments, as
-// lower-cased experiment names.
-func EnabledExperiments() []string {
-	return expList(&Experiment, nil, false)
-}