// position to discover whether there is a blank before the parenthesis.
	// We only get here if defining a macro inside a macro.
	// This imperfect implementation means we cannot tell the difference between
	//	#define A #define B(x) x
	// and
	//	#define A #define B (x) x
	// The first definition of B has an argument, the second doesn't. Because we let

# requireincompatible are pruned out (because the module that requires
# it — lazy v0.1.0 — specifies 'go 1.17', and it is not otherwise relevant to
# the main module).

# 'go mod tidy' should by default diagnose the difference in dependencies as an
# error, with useful suggestions about how to resolve it.

cp go.mod go.mod.orig
! go mod tidy

	REG_ELEM_END
)

// Not registers, but flags that can be combined with regular register
// constants to indicate extended register conversion. When checking,
// you should subtract obj.RBaseARM64 first. From this difference, bit 11
// indicates extended register, bits 8-10 select the conversion mode.
// REG_LSL is the index shift specifier, bit 9 indicates shifted offset register.
const REG_LSL = obj.RBaseARM64 + 1<<9

				if f.pass.debug > 0 {
					fmt.Printf("Mark stmt effectively-empty-block %s %s %s\n", f.Name, b, flc(b.Pos))
				}
			}
			endlines[b.ID] = b.Pos
			continue
		}
		// check predecessors for any difference; if firstPos differs, then it is a boundary.
		if len(b.Preds) == 0 { // Don't forget the entry block
			b.Values[firstPosIndex].Pos = firstPos.WithIsStmt()
			if f.pass.debug > 0 {

# requireincompatible are pruned out (because the module that requires
# it — lazy v0.1.0 — specifies 'go 1.17', and it is not otherwise relevant to
# the main module).


# 'go mod tidy' should by default diagnose the difference in dependencies as an
# error, with useful suggestions about how to resolve it.

cp go.mod go.mod.orig
! go mod tidy

func IsARMFloatCmp(op obj.As) bool {
	switch op {
	case arm.ACMPF, arm.ACMPD:
		return true
	}
	return false
}

// ARMMRCOffset implements the peculiar encoding of the MRC and MCR instructions.
// The difference between MRC and MCR is represented by a bit high in the word, not
// in the usual way by the opcode itself. Asm must use AMRC for both instructions, so
// we return the opcode for MRC so that asm doesn't need to import obj/arm.

	}

	// It should be in the first few bytes, but read a lot just in case,
	// especially given our past problems on OS X with the build ID moving.
	// There shouldn't be much difference between reading 4kB and 32kB:
	// the hard part is getting to the data, not transferring it.
	n := sect.Size
	if n > uint64(readSize) {
		n = uint64(readSize)
	}
	buf := make([]byte, n)

// If a call fails (returns false), unification fails.
//
// In the unification context, structural equivalence of two types
// ignores the difference between a defined type and its underlying
// type if one type is a defined type and the other one is not.
// It also ignores the difference between an (external, unbound)
// type parameter and its core type.
// If two types are not structurally equivalent, they cannot be Go

				l := b2l[b.ID]
				l0 := b2l[b0]
				l1 := b2l[b1]

				prediction := b.Likely
				// Weak loop heuristic -- both source and at least one dest are in loops,
				// and there is a difference in the destinations.
				// TODO what is best arrangement for nested loops?
				if l != nil && l0 != l1 {
					noprediction := false
					switch {
					// prefer not to exit loops
					case l1 == nil:

		// experiment tags. Report everything.
		p = " X:" + strings.Join(buildcfg.Experiment.All(), ",")
	} else {
		// If the enabled experiments differ from the baseline,
		// include that difference.
		if goexperiment := buildcfg.Experiment.String(); goexperiment != "" {
			p = " X:" + goexperiment
		}
	}

	// The go command invokes -V=full to get a unique identifier