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

package ssa

// combine copyelim and phielim into a single pass.
// copyelim removes all uses of OpCopy values from f.
// A subsequent deadcode pass is needed to actually remove the copies.
func copyelim(f *Func) {
	phielim(f)

	// loop of copyelimValue(v) process has been done in phielim() pass.
	// Update block control values.

	"cmd/internal/obj/arm64"
	"cmd/internal/obj/s390x"
	"cmd/internal/obj/x86"
	"cmd/internal/src"
	"cmd/internal/sys"
)

var CheckFunc = checkFunc
var Opt = opt
var Deadcode = deadcode
var Copyelim = copyelim

var testCtxts = map[string]*obj.Link{
	"amd64": obj.Linknew(&x86.Linkamd64),
	"s390x": obj.Linknew(&s390x.Links390x),
	"arm64": obj.Linknew(&arm64.Linkarm64),
}

	for i := 0; i < len(values)/2; i++ {
		values[i], values[len(values)-1-i] = values[len(values)-1-i], values[i]
	}

	for i := 0; i < b.N; i++ {
		fun := c.Fun("entry", Bloc("entry", values...))
		Copyelim(fun.f)
	}

}

// list of passes for the compiler
var passes = [...]pass{
	{name: "number lines", fn: numberLines, required: true},
	{name: "early phielim and copyelim", fn: copyelim},
	{name: "early deadcode", fn: deadcode}, // remove generated dead code to avoid doing pointless work during opt
	{name: "short circuit", fn: shortcircuit},
	{name: "decompose user", fn: decomposeUser, required: true},

		}
		if b.Kind != BlockFirst {
			continue
		}
		b.removeEdge(1)
		b.Kind = BlockPlain
		b.Likely = BranchUnknown
	}

	// Splice out any copies introduced during dead block removal.
	copyelim(f)

	// Find live values.
	live, order := liveValues(f, reachable)
	defer func() { f.Cache.freeBoolSlice(live) }()
	defer func() { f.Cache.freeValueSlice(order) }()