[release] v0.6.20

[yuanming-hu]

Related issue = #677

Highlights:

• Bug fixes
  • Fix environment variable TI_ARCH=xxx not work ([Bug] [cli] Fix environment variable TI_ARCH=xxx not work #1528) (by 彭于斌)
• CUDA backend
  • Use CUDA launch bound to limit register usage ([CUDA] Use CUDA launch bound to limit register usage #1516) (by Yuanming Hu)
  • Format CUDA assertions and access out-of-bound errors on the host ([CUDA] [llvm] Format CUDA assertions and access out-of-bound errors on the host #1509) (by Yuanming Hu)
• Examples
  • Add FEM elastic simulator: fem99 and fem128 ([Example] [autodiff] Add FEM elastic simulator: fem99 and fem128 #1521) (by 彭于斌)
  • Add ad_gravity.py (compute gradient from potential energy) ([Example] [autodiff] Add ad_gravity.py (compute gradient from potential energy) #1522) (by 彭于斌)
  • Enhance nbody_oscillator.py with molecular force ([Example] Enhance nbody_oscillator.py with molecular force #1529) (by 彭于斌)
• GUI
  • Support gui.triangles() for batched triangle painting ([GUI] Support gui.triangles() for batched triangle painting #1520) (by 彭于斌)
• Language and syntax
  • Enhance warning system and support runtime assert message ([Lang] Enhance warning system and support runtime assert message #1492) (by 彭于斌)
  • Support "break" and "continue" in static-fors ([Lang] Support "break" and "continue" in static-fors #1496) (by 彭于斌)
  • Support (a if cond else b) syntax in Taichi-scope ([Lang] Support (a if cond else b) syntax in Taichi-scope #1468) (by 彭于斌)
  • Make block local storage support coordinate offsets and improve its performance ([Lang] [perf] Make block local storage support coordinate offsets and improve its performance #1497) (by Yuanming Hu)
• Linux
  • Fix LLVM symbol leakage to prevent conflict with libGLX_mesa.so by LD version script ([Linux] [llvm] Fix LLVM symbol leakage to prevent conflict with other libs using LLVM like GLX #1508) (by 彭于斌)
• Performance improvements
  • Make BLS work for MPM ([Perf] Make BLS work for MPM #1518) (by Yuanming Hu)
• Refactor
  • Add "ti.field" and "ti.Matrix.field" for future deprecation of "ti.var" ([Refactor] [lang] Add "ti.field" and "ti.Matrix.field" for future deprecation of "ti.var" #1502) (by 彭于斌)

Full changelog:

• [Example] [autodiff] Add FEM elastic simulator: fem99 and fem128 ([Example] [autodiff] Add FEM elastic simulator: fem99 and fem128 #1521) (by 彭于斌)
• [cuda] Another mutex fix ([cuda] Another mutex fix #1534) (by Yuanming Hu)
• [opengl] [test] Fix failed OpenGL tests these days ([opengl] [test] Fix failed OpenGL tests these days #1533) (by 彭于斌)
• [misc] Prettify KernelProfiler outputs ([misc] Prettify KernelProfiler outputs #1525) (by Yuanming Hu)
• [Example] [autodiff] Add ad_gravity.py (compute gradient from potential energy) ([Example] [autodiff] Add ad_gravity.py (compute gradient from potential energy) #1522) (by 彭于斌)
• [cuda] Fix mutex on Turing GPUs ([cuda] Fix mutex on Turing GPUs #1532) (by Yuanming Hu)
• [Bug] [cli] Fix environment variable TI_ARCH=xxx not work ([Bug] [cli] Fix environment variable TI_ARCH=xxx not work #1528) (by 彭于斌)
• [Example] Enhance nbody_oscillator.py with molecular force ([Example] Enhance nbody_oscillator.py with molecular force #1529) (by 彭于斌)
• [metal] Introduce SNodeRep_* to be used in the generated SNode structs ([metal] Introduce SNodeRep_* to be used in the generated SNode structs #1527) (by Ye Kuang)
• [test] Fix a typo in test_field.py that caused the failure of CI ([test] Fix a typo in test_field.py that caused the failure of CI #1523) (by Xudong Feng)
• [bug] Fix dynamic SNode activation ([bug] Fix dynamic SNode activation #1526) (by Yuanming Hu)
• [GUI] Support gui.triangles() for batched triangle painting ([GUI] Support gui.triangles() for batched triangle painting #1520) (by 彭于斌)
• [Perf] Make BLS work for MPM ([Perf] Make BLS work for MPM #1518) (by Yuanming Hu)
• [test] Add test_fuse_dynamic.py to unit test ([test] Add test_fuse_dynamic.py to unit test #1513) (by Ye Kuang)
• [doc] Update documentaion on meta programming for [Refactor] [lang] Deprecate x.data_type() and use x.dtype instead #1374 ([doc] Update documentaion on meta programming for #1374 #1389) (by 彭于斌)
• [CUDA] Use CUDA launch bound to limit register usage ([CUDA] Use CUDA launch bound to limit register usage #1516) (by Yuanming Hu)
• [misc] Fix ti.init argument parsing when corresponding environment variable presents ([misc] Fix ti.init argument parsing when corresponding environment variable presents #1517) (by Yuanming Hu)
• [metal] Fix listgen when iterating over children of bitmasked ([metal] Fix listgen when iterating over children of a bitmasked SNode #1511) (by Ye Kuang)
• [test] Fix test_field.py ([test] Fix test_field.py #1514) (by Yuanming Hu)
• [Refactor] [lang] Add "ti.field" and "ti.Matrix.field" for future deprecation of "ti.var" ([Refactor] [lang] Add "ti.field" and "ti.Matrix.field" for future deprecation of "ti.var" #1502) (by 彭于斌)
• [misc] Update README.md ([misc] Update README.md #1512) (by Yuanming Hu)
• [Lang] Enhance warning system and support runtime assert message ([Lang] Enhance warning system and support runtime assert message #1492) (by 彭于斌)
• [CUDA] [llvm] Format CUDA assertions and access out-of-bound errors on the host ([CUDA] [llvm] Format CUDA assertions and access out-of-bound errors on the host #1509) (by Yuanming Hu)
• [opt] Enable dead instruction elimination for RangeAssumptionStmt ([opt] Enable dead instruction elimination for RangeAssumptionStmt #1507) (by xumingkuan)
• [Linux] Fix LLVM symbol leakage to prevent conflict with libGLX_mesa.so by LD version script ([Linux] [llvm] Fix LLVM symbol leakage to prevent conflict with other libs using LLVM like GLX #1508) (by 彭于斌)
• [cli] Fix "AttributeError" of pytest arguments ([cli] Fix "AttributeError" of pytest arguments #1505) (by xumingkuan)
• [cli] Remove the never used 'tid' command ([cli] Remove the never used 'tid' command #1494) (by 彭于斌)
• [Lang] Support "break" and "continue" in static-fors ([Lang] Support "break" and "continue" in static-fors #1496) (by 彭于斌)
• [doc] Fix code-block render issue in debugging.rst ([doc] Fix code-block render issue in debugging.rst #1484) (by 彭于斌)
• [Lang] Support (a if cond else b) syntax in Taichi-scope ([Lang] Support (a if cond else b) syntax in Taichi-scope #1468) (by 彭于斌)
• [async] Add test_fuse_dense.py to unit tests ([async] Add test_fuse_dense.py to unit tests #1504) (by Ye Kuang)
• [Lang] [perf] Make block local storage support coordinate offsets and improve its performance ([Lang] [perf] Make block local storage support coordinate offsets and improve its performance #1497) (by Yuanming Hu)
• [metal] Misc tweaks to make [metal] Plug in the SNodeRep structs into codegen #1480 easier to review ([metal] Misc tweaks to make #1480 easier to review #1481) (by Ye Kuang)

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[codecov]

Codecov Report

Merging #1535 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1535   +/-   ##
=======================================
  Coverage   86.55%   86.55%           
=======================================
  Files          19       19           
  Lines        3652     3652           
  Branches      650      650           
=======================================
  Hits         3161     3161           
  Misses        358      358           
  Partials      133      133           

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