pkg.test -test.v -myflag testdata -test.cpuprofile=prof.out

(The -x flag is removed because it applies only to the go command's
execution, not to the test itself.)

The test flags that generate profiles (other than for coverage) also
leave the test binary in pkg.test for use when analyzing the profiles.

When 'go test' runs a test binary, it does so from within the

	tg.tempFile("src/p1/p1.go", `//go:binary-only-package

		package p1
	`)
	tg.wantStale("p1", "binary-only packages are no longer supported", "p1 is binary-only, and this message should always be printed")
	tg.runFail("install", "p1")
	tg.grepStderr("binary-only packages are no longer supported", "did not report attempt to compile binary-only package")

	tg.tempFile("src/p1/p1.go", `
		package p1
		import "fmt"

	if ch == nil {
		ch = make(chan struct{})
		installed[dir] = ch
		go runInstall(dir, ch)
	}
	installedMu.Unlock()
	return ch
}

// runInstall installs the library, package, or binary associated with pkg,
// which is relative to $GOROOT/src.
func runInstall(pkg string, ch chan struct{}) {
	if pkg == "net" || pkg == "os/user" || pkg == "crypto/x509" {

// Annotate Ref in Prog with C types by parsing gcc debug output.
// Conversion of debug output to Go types.

package main

import (
	"bytes"
	"debug/dwarf"
	"debug/elf"
	"debug/macho"
	"debug/pe"
	"encoding/binary"
	"errors"
	"flag"
	"fmt"
	"go/ast"
	"go/parser"
	"go/token"
	"internal/xcoff"
	"math"
	"os"
	"os/exec"
	"strconv"
	"strings"
	"unicode"
	"unicode/utf8"

	"cmd/internal/quoted"

		syntax.AndAnd: allBoolean,
		syntax.OrOr:   allBoolean,
	}
}

// If e != nil, it must be the binary expression; it may be nil for non-constant expressions
// (when invoked for an assignment operation where the binary expression is implicit).
func (check *Checker) binary(x *operand, e syntax.Expr, lhs, rhs syntax.Expr, op syntax.Operator) {
	var y operand

	check.expr(nil, x, lhs)

	"cmd/compile/internal/logopt"
	"cmd/compile/internal/reflectdata"
	"cmd/compile/internal/types"
	"cmd/internal/obj"
	"cmd/internal/obj/s390x"
	"cmd/internal/objabi"
	"cmd/internal/src"
	"encoding/binary"
	"fmt"
	"internal/buildcfg"
	"io"
	"math"
	"math/bits"
	"os"
	"path/filepath"
	"strings"
)

type deadValueChoice bool

const (
	leaveDeadValues  deadValueChoice = false

	if t.compileOnly {
		// We need to run a subprocess to log metadata. Don't do that
		// on compile-only runs.
		return nil
	}
	t.out("Test execution environment.")
	// Helper binary to print system metadata (CPU model, etc). This is a
	// separate binary from dist so it need not build with the bootstrap
	// toolchain.
	//
	// TODO(prattmic): If we split dist bootstrap and dist test then this

	}

	p.xnest = outer
	return
}

// emphasize returns a string representation of x, with (top-level)
// binary expressions emphasized by enclosing them in parentheses.
func emphasize(x Expr) string {
	s := String(x)
	if op, _ := x.(*Operation); op != nil && op.Y != nil {
		// binary expression
		return "(" + s + ")"
	}
	return s
}

func (p *parser) ifStmt() *IfStmt {
	if trace {

		fpstore2       = regInfo{inputs: []regMask{gpspsbg, gpg, fp}}
		readflags      = regInfo{inputs: nil, outputs: []regMask{gp}}
		prefreg        = regInfo{inputs: []regMask{gpspsbg}}
	)
	ops := []opData{
		// binary ops
		{name: "ADCSflags", argLength: 3, reg: gp2flags1flags, typ: "(UInt64,Flags)", asm: "ADCS", commutative: true}, // arg0+arg1+carry, set flags.

		{name: "FMOVDstoreidx", argLength: 4, reg: fpstoreidx, asm: "FMOVD", aux: "SymOff", symEffect: "Write"},                 // fp64 indexed by i store

		// binary ops
		{name: "ADD", argLength: 2, reg: gp21sp, asm: "ADD", commutative: true, clobberFlags: true},                                                                  // arg0 + arg1