// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package ssa

// addressingModes combines address calculations into memory operations
// that can perform complicated addressing modes.
func addressingModes(f *Func) {
	isInImmediateRange := is32Bit
	switch f.Config.arch {
	default:
		// Most architectures can't do this.
		return
	case "amd64", "386":

// These are often the exact inverse of rules in AMD64.rules,
// only with the conditions removed.
//
// For addressingmodes, certain single instructions are slower than the two instruction
// split generated here (which is different from the inputs to addressingmodes).
// For example:
// (CMPBconstload c (ADDQ x y)) -> (CMPBconstloadidx1 c x y) -> (CMPB c (MOVBloadidx1 x y))

	{name: "insert resched checks", fn: insertLoopReschedChecks,
		disabled: !buildcfg.Experiment.PreemptibleLoops}, // insert resched checks in loops.
	{name: "lower", fn: lower, required: true},
	{name: "addressing modes", fn: addressingModes, required: false},
	{name: "late lower", fn: lateLower, required: true},
	{name: "lowered deadcode for cse", fn: deadcode}, // deadcode immediately before CSE avoids CSE making dead values live again