forked from OSchip/llvm-project
b953cc36e2
Summary: Only constant offsets (*_IMM opcodes) are merged. It reuses code for LDS load/store merging. It relies on the scheduler to group loads. The results are mixed, I think they are mostly positive. Most shaders are affected, so here are total stats only: SGPRS: 2072198 -> 2151462 (3.83 %) VGPRS: 1628024 -> 1634612 (0.40 %) Spilled SGPRs: 7883 -> 8942 (13.43 %) Spilled VGPRs: 97 -> 101 (4.12 %) Scratch size: 1488 -> 1492 (0.27 %) dwords per thread Code Size: 60222620 -> 52940672 (-12.09 %) bytes Max Waves: 374337 -> 373066 (-0.34 %) There is 13.4% increase in SGPR spilling, DiRT Showdown spills a few more VGPRs (now 37), but 12% decrease in code size. These are the new stats for SGPR spilling. We already spill a lot SGPRs, so it's uncertain whether more spilling will make any difference since SGPRs are always spilled to VGPRs: SGPR SPILLING APPS Shaders SpillSGPR AvgPerSh alien_isolation 2938 100 0.0 batman_arkham_origins 589 6 0.0 bioshock-infinite 1769 4 0.0 borderlands2 3968 22 0.0 counter_strike_glob.. 1142 60 0.1 deus_ex_mankind_div.. 1410 79 0.1 dirt-showdown 533 4 0.0 dirt_rally 364 1163 3.2 divinity 1052 2 0.0 dota2 1747 7 0.0 f1-2015 776 1515 2.0 grid_autosport 1767 1505 0.9 hitman 1413 273 0.2 left_4_dead_2 1762 4 0.0 life_is_strange 1296 26 0.0 mad_max 358 96 0.3 metro_2033_redux 2670 60 0.0 payday2 1362 22 0.0 portal 474 3 0.0 saints_row_iv 1704 8 0.0 serious_sam_3_bfe 392 1348 3.4 shadow_of_mordor 1418 12 0.0 shadow_warrior 3956 239 0.1 talos_principle 324 1735 5.4 thea 172 17 0.1 tomb_raider 1449 215 0.1 total_war_warhammer 242 56 0.2 ue4_effects_cave 295 55 0.2 ue4_elemental 572 12 0.0 unigine_tropics 210 56 0.3 unigine_valley 278 152 0.5 victor_vran 1262 84 0.1 yofrankie 82 2 0.0 Reviewers: arsenm, nhaehnle Subscribers: kzhuravl, wdng, yaxunl, dstuttard, tpr, llvm-commits, t-tye Differential Revision: https://reviews.llvm.org/D38949 llvm-svn: 317751 |
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| .. | ||
| Analysis | ||
| Assembler | ||
| Bindings | ||
| Bitcode | ||
| BugPoint | ||
| CodeGen | ||
| DebugInfo | ||
| Examples | ||
| ExecutionEngine | ||
| Feature | ||
| FileCheck | ||
| Instrumentation | ||
| Integer | ||
| JitListener | ||
| LTO | ||
| Linker | ||
| MC | ||
| Object | ||
| ObjectYAML | ||
| Other | ||
| SafepointIRVerifier | ||
| SymbolRewriter | ||
| TableGen | ||
| ThinLTO/X86 | ||
| Transforms | ||
| Unit | ||
| Verifier | ||
| YAMLParser | ||
| tools | ||
| .clang-format | ||
| CMakeLists.txt | ||
| TestRunner.sh | ||
| lit.cfg.py | ||
| lit.site.cfg.py.in | ||