"VACC",
	"VACCB",
	"VACCH",
	"VACCF",
	"VACCG",
	"VACCQ",
	"VAC",
	"VACQ",
	"VACCC",
	"VACCCQ",
	"VN",
	"VNC",
	"VAVG",
	"VAVGB",
	"VAVGH",
	"VAVGF",
	"VAVGG",
	"VAVGL",
	"VAVGLB",
	"VAVGLH",
	"VAVGLF",
	"VAVGLG",
	"VCKSM",
	"VCEQ",
	"VCEQB",
	"VCEQH",
	"VCEQF",
	"VCEQG",
	"VCEQBS",
	"VCEQHS",
	"VCEQFS",
	"VCEQGS",
	"VCH",

	// program execution order, which tends to be true directly after ssa is
	// first built).
	if i >= len(b.Values)-1 {
		return i
	}
	// Skip the likely-ephemeral/fragile opcodes expected to vanish in a rewrite.
	if !isPoorStatementOp(v.Op) {
		return i
	}
	// Look ahead to see what the line number is on the next thing that could be a boundary.
	for j := i + 1; j < len(b.Values); j++ {
		u := b.Values[j]