}

// isFlagOp reports if v is an OP with the flag type.
func (v *Value) isFlagOp() bool {
	if v.Type.IsFlags() || v.Type.IsTuple() && v.Type.FieldType(1).IsFlags() {
		return true
	}
	// PPC64 carry generators put their carry in a non-flag-typed register
	// in their output.
	switch v.Op {
	case OpPPC64SUBC, OpPPC64ADDC, OpPPC64SUBCconst, OpPPC64ADDCconst:
		return true
	}
	return false
}

	{"decompose builtin", "late opt"},
	// decompose builtin is the last pass that may introduce new float ops, so run softfloat after it
	{"decompose builtin", "softfloat"},
	// tuple selectors must be tightened to generators and de-duplicated before scheduling
	{"tighten tuple selectors", "schedule"},
	// remove critical edges before phi tighten, so that phi args get better placement
	{"critical", "phi tighten"},

	"internal/trace"
	"internal/trace/traceviewer"
	"strings"
)

// generator is an interface for generating a JSON trace for the trace viewer
// from a trace. Each method in this interface is a handler for a kind of event
// that is interesting to render in the UI via the JSON trace.
type generator interface {
	// Global parts.
	Sync() // Notifies the generator of an EventSync event.
	StackSample(ctx *traceContext, ev *trace.Event)

	var stk int
	if gs.lastStopStack != trace.NoStack {
		stk = ctx.Stack(viewerFrames(gs.lastStopStack))
	}
	// Check invariants.
	if gs.startRunningTime == 0 {
		panic("silently broken trace or generator invariant (startRunningTime != 0) not held")
	}
	if gs.executing == R(noResource) {
		panic("non-executing goroutine stopped")
	}
	ctx.Slice(traceviewer.SliceEvent{
		Name:     gs.name(),

}

// from here down is the walk analysis
// of composite literals.
// most of the work is to generate
// data statements for the constant
// part of the composite literal.

var statuniqgen int // name generator for static temps

// StaticName returns a name backed by a (writable) static data symbol.
// Use readonlystaticname for read-only node.
func StaticName(t *types.Type) *ir.Name {