We had similar problem with exceeding code size limit on misp64 because the long branches were inefficient on mips64 . The mips64 code required 6 instructions for unconditional long branch, but this is now addressed in https://codereview.chromium.org/1147503002/.
The same Cl can be applied to mips32 and it will reduce code size, but it appears the code size emerged on mips32 due to other code inefficiencies. We start looking at this issue, and will try to find out what is the main cause for increased code size. On Wednesday, June 10, 2015 at 4:49:28 PM UTC+2, Erik Corry wrote: > > There's currently a failure on the buildbot because MIPS is generating > about 3x as much regexp code as other platforms. Part of it is that MIPS > always loads just one character at a time because of unaligned access. But > some of the code could be better. One of the culprits is > LoadCurrentCharacterUnchecked, which generates: > > addiu t7, t2, cp_offset > addu t5, t6, t7 > lbu t3, 0(t5) > > This should just be > > addu t5, t6, t2 > lbu t3, cp_offset(t5) > > Probably fixing this won't be enough to let MIPS pass the test though. > There's other stuff going on there that I haven't looked at. > > -- > Erik Corry > > Google UK Limited Registered Office: Belgrave House, 76 Buckingham Palace > Road, London SW1W 9TQ Registered in England Number: 3977902 > -- -- v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev --- You received this message because you are subscribed to the Google Groups "v8-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
