if p.rewriteCalls(f) {
		// Add `import _cgo_unsafe "unsafe"` after the package statement.
		f.Edit.Insert(f.offset(f.AST.Name.End()), "; import _cgo_unsafe \"unsafe\"")
	}
	p.rewriteRef(f)
}

// loadDefines coerces gcc into spitting out the #defines in use
// in the file f and saves relevant renamings in f.Name[name].Define.
func (p *Package) loadDefines(f *File) {
	var b bytes.Buffer
	b.WriteString(builtinProlog)

		func(r *Reader, delim byte) ([]byte, error) {
			data, err := r.ReadString(delim)
			return []byte(data), err
		},
		// ReadLine doesn't fit the data/pattern easily
		// so we leave it out. It should be covered via
		// the ReadSlice test since ReadLine simply calls
		// ReadSlice, and it's that function that handles
		// the last byte.
	}

	// Try all readers with UnreadByte.
	for rno, read := range readers {

			// to be very rare.
			return false
		}
		if v.Op.SymEffect()&SymAddr != 0 {
			// This case prevents an operation that calculates the
			// address of a local variable from being forced to schedule
			// before its corresponding VarDef.
			// See issue 28445.
			//   v1 = LOAD ...
			//   v2 = VARDEF
			//   v3 = LEAQ
			//   v4 = CMPQ v1 v3

	VADDPS.BCST 2032(DX), Z28, Z29       // 62611c5058aaf0070000
	VADDPS.BCST 2032(DX)(AX*2), Z0, Z29  // 62617c5858ac42f0070000
	VADDPS.BCST 2032(DX)(AX*2), Z1, Z29  // 6261745858ac42f0070000
	// Forced EVEX encoding due to suffixes.
	VADDPD.BCST 2032(DX), X0, X0 // 62f1fd185882f0070000
	VADDPD.BCST 2032(DX), Y0, Y0 // 62f1fd385882f0070000
	// Test new Z-cases one-by-one.
	//
	// Zevex_i_r_k_rm.

			// should be rewritten to:
			//	for i := 5; 0 < i; i-- {
			continue
		}

		if end.Block == ind.Block {
			// we can't rewrite loops where the condition depends on the loop body
			// this simple check is forced to work because if this is true a Phi in ind.Block must exists
			continue
		}

		check := ind.Block.Controls[0]
		// invert the check
		check.Args[0], check.Args[1] = check.Args[1], check.Args[0]

// Package files
//
// Parse methods are annotated with matching Go productions as appropriate.
// The annotations are intended as guidelines only since a single Go grammar
// rule may be covered by multiple parse methods and vice versa.
//
// Excluding methods returning slices, parse methods named xOrNil may return
// nil; all others are expected to return a valid non-nil node.