On Tue, 6 Nov 2018, Robin Murphy wrote: > On 06/11/2018 04:49, Nicolas Pitre wrote: > [...] > >> r3 and r5 are not used above, so no need to have them in the clobber > >> list. > > > > They are used. ldrd and strd instructions always use a pair of > > consecutive registers. So "ldrd r2, ..." loads into r2-r3 and "ldrd r4, ..." > > loads into r4-r5. > > FWIW, since we should now be enabling unified syntax everywhere, I guess we > could probably rewrite all those ldrd/strd to the UAL 3-operand form - i.e. > "ldrd r2, r3, [...]" - if we really cared for the extra clarity.
Good idea. Worthy of a separate patch though. Nicolas
