[release] v0.6.35

[yuanming-hu]

Related issue = #677

Highlights:

• Language and syntax
  • Support num_thread limitation and serial excution on CPU ([Lang] Support num_thread limitation and serial excution on CPU #1867) (by Yuanming Hu)

Full changelog:

• [refactor] Create class TypePromotionMapping for refactoring function promoted_type in lang_util.cpp ([refactor] Create class TypePromotionMapping for refactoring function promoted_type in lang_util.cpp #1874) (by Jiafeng Liu)
• [async] Draw nodes as record shape, allow embedding states into the nodes. ([async] Draw nodes as record shape, allow embedding states into nodes #1876) (by Ye Kuang)
• [Lang] Support num_thread limitation and serial excution on CPU ([Lang] Support num_thread limitation and serial excution on CPU #1867) (by Yuanming Hu)
• [async] Cache fusion results ([async] Cache fusion results #1875) (by xumingkuan)
• [Async] Fix ClearListStmt metadata ([Async] Fix ClearListStmt metadata #1873) (by Yuanming Hu)
• [async] Improve fusion optimization and add StateFlowGraph::verify ([async] Improve fusion optimization and add StateFlowGraph::verify #1872) (by xumingkuan)
• [async] Optimizations on StateFlowGraph ([async] Optimizations on StateFlowGraph #1870) (by Yuanming Hu)
• [async] Migrate AsyncEngine::fuse() to StateFlowGraph ([async] Migrate AsyncEngine::fuse() to StateFlowGraph #1859) (by xumingkuan)
• [ir] Add ClearListStmt instead of making clear_list a unique task type ([ir] Add ClearListStmt instead of making clear_list a unique task type #1868) (by Ye Kuang)
• [error] [doc] Better error message when X11 environment failed to initialize ([error] [doc] Better error message when X11 environment failed to initialize #1856) (by 彭于斌)
• [async] Highlight user kernels in the DOT graph, allows configuring rankdir ([async] Highlight user kernels in the DOT graph, allows configuring rankdir #1866) (by Ye Kuang)

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[codecov]

Codecov Report

Merging #1878 into master will decrease coverage by 0.95%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1878      +/-   ##
==========================================
- Coverage   44.21%   43.25%   -0.96%     
==========================================
  Files          44       44              
  Lines        6111     6320     +209     
  Branches     1092     1092              
==========================================
+ Hits         2702     2734      +32     
- Misses       3240     3416     +176     
- Partials      169      170       +1     

Impacted Files	Coverage Δ
python/taichi/lang/ops.py	43.56% <0.00%> (-9.09%)	⬇️
python/taichi/lang/expr.py	61.65% <0.00%> (-5.20%)	⬇️
python/taichi/lang/matrix.py	64.47% <0.00%> (-4.48%)	⬇️
python/taichi/lang/snode.py	64.22% <0.00%> (-4.20%)	⬇️
python/taichi/lang/impl.py	63.89% <0.00%> (-2.78%)	⬇️
python/taichi/lang/transformer.py	81.37% <0.00%> (-0.65%)	⬇️
python/taichi/lang/util.py	32.54% <0.00%> (-0.39%)	⬇️
python/taichi/main.py	22.99% <0.00%> (-0.37%)	⬇️
python/taichi/misc/gui.py	8.12% <0.00%> (-0.17%)	⬇️
python/taichi/lang/kernel.py	71.03% <0.00%> (-0.14%)	⬇️
... and 9 more

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