func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
	p.From.Class = 0
	p.To.Class = 0

	c := ctxt9{ctxt: ctxt, newprog: newprog}

	// Rewrite BR/BL to symbol as TYPE_BRANCH.
	switch p.As {
	case ABR,
		ABL,
		obj.ARET,
		obj.ADUFFZERO,
		obj.ADUFFCOPY:
		if p.To.Sym != nil {
			p.To.Type = obj.TYPE_BRANCH
		}
	}

	// Rewrite float constants to values stored in memory.
	switch p.As {

	{as: ABEQ, a1: C_CREG, a6: C_BRA, type_: 16, size: 4},
	{as: ABR, a6: C_BRA, type_: 11, size: 4},                                         // b label
	{as: ABR, a6: C_BRAPIC, type_: 11, size: 8},                                      // b label; nop
	{as: ABR, a6: C_LR, type_: 18, size: 4},                                          // blr
	{as: ABR, a6: C_CTR, type_: 18, size: 4},                                         // bctr

	AXVCVSXDSP
	AXVCVSXWSP
	AXVCVUXDSP
	AXVCVUXWSP
	AXSMAXJDP
	AXSMINJDP
	ALASTAOUT // The last instruction in this list. Also the first opcode generated by ppc64map.

	// aliases
	ABR   = obj.AJMP
	ABL   = obj.ACALL
	ALAST = ALASTGEN // The final enumerated instruction value + 1. This is used to size the oprange table.

	// branch
	{i: 16, as: ABEQ, a6: C_SBRA},
	{i: 16, as: ABRC, a1: C_SCON, a6: C_SBRA},
	{i: 11, as: ABR, a6: C_LBRA},
	{i: 16, as: ABC, a1: C_SCON, a2: C_REG, a6: C_LBRA},
	{i: 18, as: ABR, a6: C_REG},
	{i: 18, as: ABR, a1: C_REG, a6: C_REG},
	{i: 15, as: ABR, a6: C_ZOREG},
	{i: 15, as: ABC, a6: C_ZOREG},

	// compare and branch
	{i: 89, as: ACGRJ, a1: C_SCON, a2: C_REG, a3: C_REG, a6: C_SBRA},