}
	return l.symsByName[ver][name]
}

// Check that duplicate symbols have same contents.
func (l *Loader) checkdup(name string, r *oReader, li uint32, dup Sym) {
	p := r.Data(li)
	rdup, ldup := l.toLocal(dup)
	pdup := rdup.Data(ldup)
	reason := "same length but different contents"
	if len(p) != len(pdup) {
		reason = fmt.Sprintf("new length %d != old length %d", len(p), len(pdup))

		// Atomic adds.
		// *(arg0+auxint+aux) += arg1.  arg2=mem.
		// Returns a tuple of <old contents of *(arg0+auxint+aux), memory>.
		{name: "LAA", argLength: 3, reg: gpstorelaa, asm: "LAA", typ: "(UInt32,Mem)", aux: "SymOff", clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true, symEffect: "RdWr"},

			execCmd = []string{path}
		}
	})
	return execCmd
}

// checkExpectedOutput compares the output from compiling and/or running with the contents
// of the corresponding reference output file, if any (replace ".go" with ".out").
// If they don't match, fail with an informative message.
func (t test) checkExpectedOutput(gotBytes []byte) error {

		if off == 2*c.PtrSize {
			return int32(types.TypeHash(ti.Type.(*types.Type)))
		}
	}
	base.Fatalf("fixed32 data not known for %s:%d", sym, off)
	return 0
}

// isFixedSym returns true if the contents of sym at the given offset
// is known and is the constant address of another symbol.
func isFixedSym(sym Sym, off int64) bool {
	lsym := sym.(*obj.LSym)
	switch {
	case lsym.Type == objabi.SRODATA: