)]}' { "commit": "10085390c6d4d0df04bf412f4c9ce7ebaaa5e3f3", "tree": "65f04604fa7d7923b79b954d21abd2775e7827b6", "parents": [ "9820248e0aaaffbee87edeb6a73ced54b4e25be4" ], "author": { "name": "Alexey Bataev", "email": "a.bataev@outlook.com", "time": "Mon Mar 10 10:06:39 2025 -0400" }, "committer": { "name": "Alexey Bataev", "email": "a.bataev@outlook.com", "time": "Wed Mar 12 08:18:51 2025 -0700" }, "message": "[SLP]Reduce number of alternate instruction, where possible\n\nPrevious version was reviewed here https://github.com/llvm/llvm-project/pull/123360\nIt is mostly the same, adjusted after graph-to-tree transformation\n\nPatch tries to remove wide alternate operations.\nCurrently SLP vectorizer emits something like this:\n```\n%0 \u003d add i32\n%1 \u003d sub i32\n%2 \u003d add i32\n%3 \u003d sub i32\n%4 \u003d add i32\n%5 \u003d sub i32\n%6 \u003d add i32\n%7 \u003d sub i32\n\ntransformes to\n\n%v1 \u003d add \u003c8 x i32\u003e\n%v2 \u003d sub \u003c8 x i32\u003e\n%res \u003d shuffle %v1, %v2, \u003c0, 9, 2, 11, 4, 13, 6, 15\u003e\n```\ni.e. half of the results are just unused. This leads to increased\nregister pressure and potentially doubles number of operations.\n\nPatch introduces SplitVectorize mode, where it splits the operations by\nopcodes and produces instead something like this:\n```\n%v1 \u003d add \u003c4 x i32\u003e\n%v2 \u003d sub \u003c4 x i32\u003e\n%res \u003d shuffle %v1, %v2, \u003c0, 4, 1, 5, 2, 6, 3, 7\u003e\n```\nIt allows to improve the performance by reducing number of ops. Also, it\nturns on some other improvements, like improved graph reordering.\n\n-O3+LTO, AVX512\nMetric: size..text\nProgram size..text\n results results0 diff\n test-suite :: MultiSource/Benchmarks/Olden/tsp/tsp.test 2788.00 2820.00 1.1%\ntest-suite :: MultiSource/Benchmarks/Prolangs-C/TimberWolfMC/timberwolfmc.test 278168.00 280904.00 1.0%\n test-suite :: MultiSource/Benchmarks/FreeBench/pifft/pifft.test 82682.00 83258.00 0.7%\n test-suite :: External/SPEC/CFP2006/433.milc/433.milc.test 139344.00 139712.00 0.3%\n test-suite :: MultiSource/Benchmarks/FreeBench/fourinarow/fourinarow.test 27149.00 27197.00 0.2%\n test-suite :: MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4.test 1008188.00 1009948.00 0.2%\n test-suite :: MultiSource/Benchmarks/mediabench/gsm/toast/toast.test 39226.00 39290.00 0.2%\n test-suite :: MultiSource/Benchmarks/MiBench/telecomm-gsm/telecomm-gsm.test 39229.00 39293.00 0.2%\n test-suite :: External/SPEC/CINT2017rate/500.perlbench_r/500.perlbench_r.test 2074533.00 2076549.00 0.1%\ntest-suite :: External/SPEC/CINT2017speed/600.perlbench_s/600.perlbench_s.test 2074533.00 2076549.00 0.1%\n test-suite :: External/SPEC/CINT2006/464.h264ref/464.h264ref.test 798440.00 798952.00 0.1%\n test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C/miniGMG/miniGMG.test 44123.00 44139.00 0.0%\n test-suite :: MultiSource/Benchmarks/Bullet/bullet.test 318942.00 319038.00 0.0%\n test-suite :: External/SPEC/CFP2017rate/511.povray_r/511.povray_r.test 1159880.00 1160152.00 0.0%\n test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C/miniAMR/miniAMR.test 73595.00 73611.00 0.0%\n test-suite :: External/SPEC/CFP2006/453.povray/453.povray.test 1146124.00 1146348.00 0.0%\n test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR/CLAMR.test 203831.00 203847.00 0.0%\n test-suite :: MultiSource/Benchmarks/MiBench/consumer-lame/consumer-lame.test 207662.00 207678.00 0.0%\n test-suite :: External/SPEC/CFP2006/447.dealII/447.dealII.test 589851.00 589883.00 0.0%\n test-suite :: External/SPEC/CFP2017rate/538.imagick_r/538.imagick_r.test 1398543.00 1398559.00 0.0%\n test-suite :: External/SPEC/CFP2017speed/638.imagick_s/638.imagick_s.test 1398543.00 1398559.00 0.0%\n test-suite :: External/SPEC/CFP2017rate/510.parest_r/510.parest_r.test 2050990.00 2051006.00 0.0%\n\n test-suite :: External/SPEC/CFP2017rate/526.blender_r/526.blender_r.test 12559687.00 12559591.00 -0.0%\n test-suite :: External/SPEC/CINT2006/403.gcc/403.gcc.test 3074157.00 3074125.00 -0.0%\n test-suite :: External/SPEC/CINT2006/400.perlbench/400.perlbench.test 1092252.00 1092188.00 -0.0%\n test-suite :: External/SPEC/CFP2017rate/508.namd_r/508.namd_r.test 779763.00 779715.00 -0.0%\n test-suite :: MultiSource/Benchmarks/ASCI_Purple/SMG2000/smg2000.test 253517.00 253485.00 -0.0%\n test-suite :: MultiSource/Applications/JM/lencod/lencod.test 848259.00 848035.00 -0.0%\n test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C++/miniFE/miniFE.test 93064.00 93016.00 -0.1%\n test-suite :: MultiSource/Applications/JM/ldecod/ldecod.test 383747.00 383475.00 -0.1%\n test-suite :: External/SPEC/CINT2017speed/625.x264_s/625.x264_s.test 673051.00 662907.00 -1.5%\n test-suite :: External/SPEC/CINT2017rate/525.x264_r/525.x264_r.test 673051.00 662907.00 -1.5%\n\nOlden/tsp - small variations\nProlangs-C/TimberWolfMC - small variations, some code not inlined\nFreeBench/pifft - extra store \u003c8 x double\u003e vectorized, some other extra\nvectorizations\nCFP2006/433.milc - better vector code\nFreeBench/fourinarow - better vector code\nBenchmarks/tramp3d-v4 - extra vector code, small variations\nmediabench/gsm/toast - small variations\nMiBench/telecomm-gsm - small variations\nCINT2017rate/500.perlbench_r\nCINT2017speed/600.perlbench_s - better vector code, small variations\nCINT2006/464.h264ref - some smaller code + changes similar to x264\nDOE-ProxyApps-C/miniGMG - small variations\nBenchmarks/Bullet - small variations\nCFP2017rate/511.povray_r - small variations\nDOE-ProxyApps-C/miniAMR - small variations\nCFP2006/453.povray - small variations\nDOE-ProxyApps-C++/CLAMR - small variations\nMiBench/consumer-lame - small variations\nCFP2006/447.dealII - small variations\nCFP2017rate/538.imagick_r\nCFP2017speed/638.imagick_s - small variations\nCFP2017rate/510.parest_r - better vector code, small variations\nCFP2017rate/526.blender_r - small variations\nCINT2006/403.gcc - small variations\nCINT2006/400.perlbench - small variations\nCFP2017rate/508.namd_r - small variations\nASCI_Purple/SMG2000 - small variations\nJM/lencod - extra store \u003c16 x i32\u003e, small variations\nDOE-ProxyApps-C++/miniFE - small variations\nJM/ldecod - extra vector code, small variations, less shuffles\nCINT2017speed/625.x264_s\nCINT2017rate/525.x264_r - the number of instructions increased, but\nlooks like they are more performant. E.g., for function\nx264_pixel_satd_8x8, llvm-mca reports better throughput - 84 for the\ncurrent version and 59 for the new version.\n\n-O3+LTO, mcpu\u003dsifive-p470\n\nMetric: size..text\n\n results results0 diff\n test-suite :: External/SPEC/CINT2006/464.h264ref/464.h264ref.test 580768.00 581118.00 0.1%\n test-suite :: MultiSource/Applications/d/make_dparser.test 78854.00 78894.00 0.1%\n test-suite :: MultiSource/Applications/JM/lencod/lencod.test 633448.00 633750.00 0.0%\n test-suite :: MultiSource/Benchmarks/Bullet/bullet.test 277002.00 277080.00 0.0%\n test-suite :: External/SPEC/CINT2006/400.perlbench/400.perlbench.test 931938.00 931960.00 0.0%\n test-suite :: External/SPEC/CINT2006/403.gcc/403.gcc.test 2512806.00 2512822.00 0.0%\n test-suite :: External/SPEC/CINT2017speed/602.gcc_s/602.gcc_s.test 7659880.00 7659876.00 -0.0%\n test-suite :: External/SPEC/CINT2017rate/502.gcc_r/502.gcc_r.test 7659880.00 7659876.00 -0.0%\n test-suite :: External/SPEC/CFP2017rate/510.parest_r/510.parest_r.test 1602448.00 1602434.00 -0.0%\n test-suite :: External/SPEC/CFP2017rate/526.blender_r/526.blender_r.test 9496664.00 9496542.00 -0.0%\n test-suite :: MultiSource/Benchmarks/MiBench/consumer-lame/consumer-lame.test 147424.00 147422.00 -0.0%\n test-suite :: External/SPEC/CINT2017speed/600.perlbench_s/600.perlbench_s.test 1764608.00 1764578.00 -0.0%\n test-suite :: External/SPEC/CINT2017rate/500.perlbench_r/500.perlbench_r.test 1764608.00 1764578.00 -0.0%\n test-suite :: MultiSource/Benchmarks/7zip/7zip-benchmark.test 841656.00 841632.00 -0.0%\n test-suite :: External/SPEC/CFP2006/453.povray/453.povray.test 949026.00 948962.00 -0.0%\n test-suite :: External/SPEC/CFP2017rate/511.povray_r/511.povray_r.test 946348.00 946284.00 -0.0%\n test-suite :: MultiSource/Applications/JM/ldecod/ldecod.test 279794.00 279764.00 -0.0%\n test-suite :: MultiSource/Benchmarks/mediabench/g721/g721encode/encode.test 4776.00 4772.00 -0.1%\n test-suite :: MultiSource/Benchmarks/mediabench/gsm/toast/toast.test 25074.00 25028.00 -0.2%\n test-suite :: MultiSource/Benchmarks/MiBench/telecomm-gsm/telecomm-gsm.test 25074.00 25028.00 -0.2%\n test-suite :: MultiSource/Benchmarks/DOE-ProxyApps-C/miniGMG/miniGMG.test 29336.00 29184.00 -0.5%\n test-suite :: External/SPEC/CINT2017rate/525.x264_r/525.x264_r.test 535390.00 510124.00 -4.7%\n test-suite :: External/SPEC/CINT2017speed/625.x264_s/625.x264_s.test 535390.00 510124.00 -4.7%\ntest-suite :: SingleSource/Regression/C/gcc-c-torture/execute/ieee/GCC-C-execute-ieee-pr50310.test 886.00 608.00 -31.4%\n\nCINT2006/464.h264ref - extra v16i32 reduction\nd/make_dparser - better vector code\nJM/lencod - extra v16i32 reduction\nBenchmarks/Bullet - smaller vector code\nCINT2006/400.perlbench - better vector code\nCINT2006/403.gcc - small variations\nCINT2017speed/602.gcc_s\nCINT2017rate/502.gcc_r - small variations\nCFP2017rate/510.parest_r - small variations\nCFP2017rate/526.blender_r - small variations\nMiBench/consumer-lame - small variations\nCINT2017speed/600.perlbench_s\nCINT2017rate/500.perlbench_r - small variations\nBenchmarks/7zip - small variations\nCFP2017rate/511.povray_r - small variations\nJM/ldecod - extra vector code\nmediabench/g721/g721encode - extra vector code\nmediabench/gsm - extra vector code\nMiBench/telecomm-gsm - extra vector code\nDOE-ProxyApps-C/miniGMG - extra vector code\nCINT2017rate/525.x264_r\nCINT2017speed/625.x264_s - reduced number of wide operations and\nshuffles, saving the registers, similar to X86, extra code in\npixel_hadamard_ac vectorized\nieee/GCC-C-execute-ieee-pr50310 - extra code vectorized\n\nCINT2006/464.h264ref - extra vector code in find_sad_16x16\nJM/lencod - extra vector code in find_sad_16x16\nd/make_dparser - smaller vector code\nBenchmarks/Bullet - small variations\nCINT2006/400.perlbench - smaller vector code\nCFP2017rate/526.blender_r - small variations, extra store \u003c8 x float\u003e in\nthe loop, extra store \u003c8 x i8\u003e in loop\nCINT2017rate/500.perlbench_r\nCINT2017speed/600.perlbench_s - small variations\nMiBench/consumer-lame - small variations\nJM/ldecod - extra vector code\nmediabench/g721/g721encode - small variations\n\nReviewers: hiraditya\n\nReviewed By: hiraditya\n\nPull Request: https://github.com/llvm/llvm-project/pull/128907\n", "tree_diff": [ { "type": "modify", "old_id": "3081379bafd06b93ae12fd3fa5ff4ea7fe3b7bee", "old_mode": 33188, "old_path": "llvm/include/llvm/Analysis/TargetTransformInfo.h", "new_id": "4d311e7e9fd6aba5b4a6e2f0613ec5454571a59a", "new_mode": 33188, "new_path": "llvm/include/llvm/Analysis/TargetTransformInfo.h" }, { "type": "modify", "old_id": "63fe7debfb8c7ba96d6ed9d063e4a1892998f9d2", "old_mode": 33188, "old_path": "llvm/include/llvm/Analysis/TargetTransformInfoImpl.h", "new_id": "c15694916a732486729f7d716022ccbc1dded242", "new_mode": 33188, "new_path": "llvm/include/llvm/Analysis/TargetTransformInfoImpl.h" }, { "type": "modify", "old_id": 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