Advogato: Personal info for rth

rth is currently certified at Master level.

Name: Richard Henderson
Member since: 2000-04-08 21:26:40
Last Login: N/A

Notes:

I work on GCC full time for Cygn^wRed Hat. In theory I have responsibilities in GNU binutils, but I avoid that like the plague and have successfuly pawned that off.

I also own the Linux/Alpha port, which has not gotten as much attention as it deserves recently.

Let's see how I like keeping a diary...

Projects

Lead Developer on GCC: GNU Compiler Collection

Recent blog entries by rth

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2 May 2000 »

Finished merging the condexec bits to mainline. Whoo hoo.

Decided that my headache wasn't quite pounding at the proper weekend-bender level, so I dived face-first into the gcc build configury. There is much progress. Why, already I have replaced 380 lines of completely unreadable make+sh with 280 different lines of even less readable make+sh.

Tomorrow I'll try to bulk that back out to 500 or so with brand new shared library build cruft. Wouldn't want anyone to think I was going soft.

28 Apr 2000 »

So I've been lame. I wondered how long this would take. About a week it seems.

Lots o' condexec hacking over the past week. Merged 200k of patches in 14 parts last night. Halfway done, though the really hard part is over. Bushed.

Got nice-n-toasty at the bar until the dj came in and started being excessively loud. Tool.

19 Apr 2000 »

Lots of condexec hacking today. Talked to wilson and runrau about using branch prediction info during if-conversion. Realized how suboptimial this first cut is likely to be. Need to spend some time looking through papers soon (trimaran and uiuc come to mind).

Hopefully I'll get the first cut on the non-trivial transformations finished enough to be functional tomorrow. If so, I'll have the pleasure of deleting 2100 lines of butt-ugly jump.c code.

18 Apr 2000 »

DaveM is no L33T HaX0r, he's a prentice butt munch Kwake L00s3R. If he wuz 4 reel master, he'd be plaing uNreel Tournamint.

18 Apr 2000 »

Implemented __builtin_expect for current cvs. This was a Cygnus local feature done ages ago, but in a moderately kludgy way. At the same time, I got to seriously look at the block reordering code that Stan did earlier this year. It's looking pretty good. Even without profile feedback or explicit annotations, estimate_probabilities seems to come up with reasonable guesses a lot of the time. It'll be good when Jason finishes fixing the debug info interactions so we can turn this on for real.

Franz ran into yet another problem with the new flow code. Seems the PPC backend is being naughty with eliminible registers. Geoff was non-committal about fixing it, at least right away. I suppose we can hack around the problem for now.

Nasty structure passing bug uncovered in the sibcall code. No fucking clue how to fix it properly. But if we did solve it properly, we'd have automatically fixed the REG_EQUAL backing store uncleanliness at the same time. Should discuss alternatives with Law tomorrow.

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