1) LIS.cond2s contains some suggestions about trivial improvements which would improve the quality of the code by a fair bit. 2) LIS.csieve is a disassembly of the sieve benchmark run through NORCROFTs C compiler - which does a dataflow analysis to see if it can keep variables in registers throughout a procedure. The code for the identical version of the sieve in Imp is in LIS.sieve - NORCROFT's code wins hands-down, although the Imp code could be improved by simple live/dead analysis at a local level, with delayed storing of variables and moving invariants out of short loops. 3) After observing the quality of the NorCroft C, I put the conditional-test file through it (after translating to C) - it produced almost exactly the code I generated by hand...
Name Last modified Size Description
d.imp 2008-10-12 00:24 48 z.txt 2008-10-12 00:24 78 static.c 2008-10-12 00:24 115 intmath.imp 2008-10-12 00:24 220 map.imp 2008-10-12 00:24 229 static.imp 2008-10-12 00:24 232 realmath.src 2008-10-12 00:24 255 triglog.src 2008-10-12 00:24 261 map.dec 2008-10-12 00:24 288 intmath.dec 2008-10-12 00:24 289 static.dec 2008-10-12 00:24 291 sieve.dec 2008-10-12 00:24 298 cond2s.dec 2008-10-12 00:24 327 dectags.imp 2008-10-12 00:25 381 sieve.c 2008-10-12 00:24 562 static.aof 2008-10-12 00:24 604 sieve.imp 2008-10-12 00:24 638 encode.imp 2008-10-12 00:24 658 d.dec 2008-10-12 00:24 704 mydec.dec 2008-10-12 00:24 768 README 2008-10-12 00:24 795 intmath.aof 2008-10-12 00:24 912 cond2s.c 2008-10-12 00:24 2.4K cond2s.imp 2008-10-12 00:24 2.8K zzz.txt 2008-10-12 00:24 3.1K temp2.tmp 2008-10-12 00:25 3.5K csieve.lis 2008-10-12 00:25 3.7K dd.imp 2008-10-12 00:24 4.2K ccond2s.lis 2008-10-12 00:24 4.7K mydecv0.imp 2008-10-12 00:24 4.9K sieve.lis 2008-10-12 00:24 5.4K temp1.tmp 2008-10-12 00:25 5.7K cond2s.lis 2008-10-12 00:24 8.3K savedecarm.imp 2008-10-12 00:24 12K decarm.imp 2008-10-12 00:25 16K decoder.imp 2008-10-12 00:24 18K d.exe 2008-10-12 00:24 19K sieve.exe 2008-10-12 00:24 31K edit.exe 2008-10-12 00:24 31K mydec.exe 2008-10-12 00:24 34K decode.exe 2008-10-12 00:24 60K link.exe 2008-10-12 00:25 108K implib.a 2008-10-12 00:25 130K imp77.exe 2008-10-12 00:24 221K