Tags:    []string{"v2.0.1", "v2.3"},
			},
		},
		{
			repo: gitrepo1,
			rev:  "v2.3", // badly-named tag (we only respect full semver v2.3.0)
			info: &RevInfo{
				Name:    "76a00fb249b7f93091bc2c89a789dab1fc1bc26f",
				Short:   "76a00fb249b7",
				Version: "v2.3",
				Time:    time.Date(2018, 4, 17, 19, 45, 48, 0, time.UTC),
				Tags:    []string{"v2.0.1", "v2.3"},
			},
		},
		{

	// Max returns the maximum of v1 and v2 (it returns either v1 or v2)
	// in the module with path p.
	//
	// For all versions v, Max(v, "none") must be v,
	// and for the target passed as the first argument to MVS functions,
	// Max(target, v) must be target.
	//
	// Note that v1 < v2 can be written Max(v1, v2) != v1
	// and similarly v1 <= v2 can be written Max(v1, v2) == v2.
	Max(p, v1, v2 string) string
}

		}
		v.reset(OpComplexMake)
		v0 := b.NewValue0(v.Pos, OpLoad, typ.Float32)
		v0.AddArg2(ptr, mem)
		v1 := b.NewValue0(v.Pos, OpLoad, typ.Float32)
		v2 := b.NewValue0(v.Pos, OpOffPtr, typ.Float32Ptr)
		v2.AuxInt = int64ToAuxInt(4)
		v2.AddArg(ptr)
		v1.AddArg2(v2, mem)
		v.AddArg2(v0, v1)
		return true
	}
	// match: (Load <t> ptr mem)
	// cond: t.IsComplex() && t.Size() == 16

	//	hn, hp: hidden len, pointer
	//	hb: hidden bool
	//	a, v1, v2: not hidden aggregate, val 1, 2

	a := nrange.X
	t := a.Type()
	lno := ir.SetPos(a)

	v1, v2 := nrange.Key, nrange.Value

	if ir.IsBlank(v2) {
		v2 = nil
	}

	if ir.IsBlank(v1) && v2 == nil {
		v1 = nil
	}

	if v1 == nil && v2 != nil {
		base.Fatalf("walkRange: v2 != nil while v1 == nil")
	}

	var body []ir.Node

sets the feature build tags for all previous levels as well.
For example, GOAMD64=v2 sets the amd64.v1 and amd64.v2 feature flags.
This ensures that code making use of v2 features continues to compile
when, say, GOAMD64=v4 is introduced.
Code handling the absence of a particular feature level
should use a negation:

	//go:build !amd64.v2

To keep a file from being considered for any build:

	//go:build ignore

	{"VS56", "VS56"},
	{"VS57", "VS57"},
	{"VS58", "VS58"},
	{"VS59", "VS59"},
	{"VS60", "VS60"},
	{"VS61", "VS61"},
	{"VS62", "VS62"},
	{"VS63", "VS63"},
	{"V0", "V0"},
	{"V1", "V1"},
	{"V2", "V2"},
	{"V3", "V3"},
	{"V4", "V4"},
	{"V5", "V5"},
	{"V6", "V6"},
	{"V7", "V7"},
	{"V8", "V8"},
	{"V9", "V9"},
	{"V10", "V10"},
	{"V11", "V11"},
	{"V12", "V12"},
	{"V13", "V13"},

	}
	if a.tag != b.tag {
		return false
	}
	if a.tag == constant {
		// The same content of const value may be different, we should
		// compare with auxInt instead
		v1 := a.val
		v2 := b.val
		if v1.Op == v2.Op && v1.AuxInt == v2.AuxInt {
			return true
		} else {
			return false
		}
	}
	return true
}

// possibleConst checks if Value can be folded to const. For those Values that can

	//	path = nanomsg.org/go/mangos/v2
	//	codeRoot = nanomsg.org/go/mangos/v2
	//	pathPrefix = nanomsg.org/go/mangos
	//	pathMajor = /v2
	//	pseudoMajor = v2
	//
	// The other is similar: for gopkg.in only, the major version is encoded
	// with a dot rather than a slash, and thus can't be in a subdirectory.
	//	path = gopkg.in/yaml.v2
	//	codeRoot = gopkg.in/yaml.v2
	//	pathPrefix = gopkg.in/yaml
	//	pathMajor = .v2

					// errors for modules with shorter paths.

					// golang.org/issue/34383 is a special case of this: if we have
					// already found example.com/foo/v2@v2.0.0 with a matching go.mod
					// file, ignore the error from example.com/foo@v2.0.0.
				} else {
					err = r.err
				}
			}
		}
	}

	// TODO(#26232): If len(found) == 0 and some of the errors are 4xx HTTP

//			reg = REG_[US]XT[BHWX] + register + shift amount
//			offset = ((reg&31) << 16) | (exttype << 13) | (amount<<10)
//
//	reg.<T>
//		Register arrangement for ARM64 SIMD register
//		e.g.: V1.S4, V2.S2, V7.D2, V2.H4, V6.B16
//		Encoding:
//			type = TYPE_REG
//			reg = REG_ARNG + register + arrangement
//
//	reg.<T>[index]
//		Register element for ARM64
//		Encoding:
//			type = TYPE_REG