{"runtime.selectnbsend", 1},
	{"runtime.selectnbrecv", 1},
	{"runtime.selectsetpc", 1},
	{"runtime.selectgo", 1},
	{"runtime.block", 1},
	{"runtime.makeslice", 1},
	{"runtime.makeslice64", 1},
	{"runtime.makeslicecopy", 1},
	{"runtime.growslice", 1},
	{"runtime.unsafeslicecheckptr", 1},
	{"runtime.panicunsafeslicelen", 1},
	{"runtime.panicunsafeslicenilptr", 1},
	{"runtime.unsafestringcheckptr", 1},

// type, and returns an expression that yields the *runtime._type
// value representing that slice type's element type.
func MakeSliceElemRType(pos src.XPos, n *ir.MakeExpr) ir.Node {
	assertOp2(n, ir.OMAKESLICE, ir.OMAKESLICECOPY)
	if hasRType(n, n.RType, "RType") {
		return n.RType
	}
	return sliceElemRType(pos, n.Type())
}

// RangeMapRType asserts that n is a "range" loop over a map value,