// It's fragile and error-prone. We did a trick by reusing the existing rules
	// in generic rules for compile-time evaluation. But generic rules rewrite
	// original value, this behavior is undesired, because the lattice of values
	// may change multiple times, once it was rewritten, we lose the opportunity
	// to change it permanently, which can lead to errors. For example, We cannot

	"errors"
	"flag"
	"fmt"
	"internal/cfg"
	"internal/goarch"
	"internal/platform"
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
	"strconv"
	"strings"
	"sync"
	"testing"
)

// Save the original environment during init for use in checks. A test
// binary may modify its environment before calling HasExec to change its
// behavior (such as mimicking a command-line tool), and that modified

	}
	return
}

// slicebytetostringtmp returns a "string" referring to the actual []byte bytes.
//
// Callers need to ensure that the returned string will not be used after
// the calling goroutine modifies the original slice or synchronizes with
// another goroutine.
//
// The function is only called when instrumenting
// and otherwise intrinsified by the compiler.
//
// Some internal compiler optimizations use this function.

// aligned appropriately for the gcc ABI.
// See cgocall.go for more details.
TEXT ·asmcgocall(SB),NOSPLIT,$0-20
	MOVV	fn+0(FP), R25
	MOVV	arg+8(FP), R4

	MOVV	R29, R3	// save original stack pointer
	MOVV	g, R2

	// Figure out if we need to switch to m->g0 stack.
	// We get called to create new OS threads too, and those
	// come in on the m->g0 stack already. Or we might already

		after[p.ID] = []*Block{b}
		for {
			nextIdx := idToIdx[b.ID] + 1
			if nextIdx >= len(f.Blocks) { // reached end of function (maybe impossible?)
				break
			}
			nextb := f.Blocks[nextIdx]
			if nextb == p { // original loop predecessor is next
				break
			}
			if loopnest.b2l[nextb.ID] == loop {
				after[p.ID] = append(after[p.ID], nextb)
			}
			b = nextb
		}

	fmt.Fprintf(h, "input %q\n", b.fileHash(input))

	return h.Sum()
}

// pgoActor implements the Actor interface for preprocessing PGO profiles.
type pgoActor struct {
	// input is the path to the original pprof profile.
	input string
}

func (p *pgoActor) Act(b *Builder, ctx context.Context, a *Action) error {
	if b.useCache(a, b.pgoActionID(p.input), a.Target, !b.IsCmdList) || b.IsCmdList {
		return nil
	}

// aligned appropriately for the gcc ABI.
// See cgocall.go for more details.
TEXT ·asmcgocall(SB),NOSPLIT,$0-20
	MOVD	fn+0(FP), R1
	MOVD	arg+8(FP), R0

	MOVD	RSP, R2		// save original stack pointer
	CBZ	g, nosave
	MOVD	g, R4

	// Figure out if we need to switch to m->g0 stack.
	// We get called to create new OS threads too, and those
	// come in on the m->g0 stack already. Or we might already

env OLD_GOFLAGS=$GOFLAGS
env GOFLAGS=-modfile=go.gen.mod
go generate -modfile=go.alt.mod .
env GOFLAGS=$OLD_GOFLAGS
grep example.com/exclude go.gen.mod
! grep example.com/exclude go.alt.mod


# The original files should not have been modified.
cmp go.mod go.mod.orig
cmp go.sum go.sum.orig


# If the alternate mod file does not have a ".mod" suffix, an error
# should be reported.
cp go.alt.mod goaltmod

		ret, err = time.Parse(formatStr, s)
	}
	if err != nil {
		return
	}

	if serialized := ret.Format(formatStr); serialized != s {
		err = fmt.Errorf("asn1: time did not serialize back to the original value and may be invalid: given %q, but serialized as %q", s, serialized)
		return
	}

	if ret.Year() >= 2050 {
		// UTCTime only encodes times prior to 2050. See https://tools.ietf.org/html/rfc5280#section-4.1.2.5.1

// Call fn(arg) on the scheduler stack,
// aligned appropriately for the gcc ABI.
// See cgocall.go for more details.
TEXT ·asmcgocall(SB),NOSPLIT,$0-20
	MOV	fn+0(FP), X5
	MOV	arg+8(FP), X10

	MOV	X2, X8	// save original stack pointer
	MOV	g, X9

	// Figure out if we need to switch to m->g0 stack.
	// We get called to create new OS threads too, and those
	// come in on the m->g0 stack already. Or we might already