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0e532fb177
This patch updates the code that deals with conditions from predicate info to make use of constant ranges. For ssa_copy instructions inserted by PredicateInfo, we have 2 ranges: 1. The range of the original value. 2. The range imposed by the linked condition. 1. is known, 2. can be determined using makeAllowedICmpRegion. The intersection of those ranges is the range for the copy. With this patch, we get a nice increase in the number of instructions eliminated by both SCCP and IPSCCP for some benchmarks: For MultiSource, SPEC2000 & SPEC2006: Tests: 237 Same hash: 170 (filtered out) Remaining: 67 Metric: sccp.NumInstRemoved Program base patch diff test-suite...Source/Benchmarks/sim/sim.test 10.00 71.00 610.0% test-suite...CFP2000/177.mesa/177.mesa.test 361.00 1626.00 350.4% test-suite...encode/alacconvert-encode.test 141.00 602.00 327.0% test-suite...decode/alacconvert-decode.test 141.00 602.00 327.0% test-suite...CI_Purple/SMG2000/smg2000.test 1639.00 4093.00 149.7% test-suite...peg2/mpeg2dec/mpeg2decode.test 75.00 163.00 117.3% test-suite...T2006/401.bzip2/401.bzip2.test 358.00 513.00 43.3% test-suite...rks/FreeBench/pifft/pifft.test 11.00 15.00 36.4% test-suite...langs-C/unix-tbl/unix-tbl.test 4.00 5.00 25.0% test-suite...lications/sqlite3/sqlite3.test 541.00 667.00 23.3% test-suite.../CINT2000/254.gap/254.gap.test 243.00 299.00 23.0% test-suite...ks/Prolangs-C/agrep/agrep.test 25.00 29.00 16.0% test-suite...marks/7zip/7zip-benchmark.test 1135.00 1304.00 14.9% test-suite...lications/ClamAV/clamscan.test 1105.00 1268.00 14.8% test-suite...urce/Applications/lua/lua.test 398.00 436.00 9.5% Metric: sccp.IPNumInstRemoved Program base patch diff test-suite...C/CFP2000/179.art/179.art.test 1.00 3.00 200.0% test-suite...006/447.dealII/447.dealII.test 429.00 1056.00 146.2% test-suite...nch/fourinarow/fourinarow.test 3.00 7.00 133.3% test-suite...CI_Purple/SMG2000/smg2000.test 818.00 1748.00 113.7% test-suite...ks/McCat/04-bisect/bisect.test 3.00 5.00 66.7% test-suite...CFP2000/177.mesa/177.mesa.test 165.00 255.00 54.5% test-suite...ediabench/gsm/toast/toast.test 18.00 27.00 50.0% test-suite...telecomm-gsm/telecomm-gsm.test 18.00 27.00 50.0% test-suite...ks/Prolangs-C/agrep/agrep.test 24.00 35.00 45.8% test-suite...TimberWolfMC/timberwolfmc.test 43.00 62.00 44.2% test-suite...encode/alacconvert-encode.test 46.00 66.00 43.5% test-suite...decode/alacconvert-decode.test 46.00 66.00 43.5% test-suite...langs-C/unix-tbl/unix-tbl.test 12.00 17.00 41.7% test-suite...peg2/mpeg2dec/mpeg2decode.test 31.00 41.00 32.3% test-suite.../CINT2000/254.gap/254.gap.test 117.00 154.00 31.6% Reviewers: efriedma, davide Reviewed By: efriedma Differential Revision: https://reviews.llvm.org/D76611 |
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