[release] v0.6.38

[yuanming-hu]

Related issue = #677

Highlights:

• Examples
  • Fix rounding error for cornell_box.py ([Example] Fix rounding error for cornell_box.py #1908) (by 蕉太狼)
• Language and syntax
  • Add @ti.materialize_callback for functions to be called right after root materialization ([Lang] Add @ti.materialize_callback for functions to be called right after root materialization #1912) (by 彭于斌)

Full changelog:

• [doc] Guard values with "ti.approx" in "docs/write_test.rst" to allow FP-error tolerance ([doc] Guard values with "ti.approx" in "docs/write_test.rst" to allow FP-error tolerance #1911) (by Tony)
• [Lang] Add @ti.materialize_callback for functions to be called right after root materialization ([Lang] Add @ti.materialize_callback for functions to be called right after root materialization #1912) (by 彭于斌)
• [metal] Fix error message ([metal] Fix error message #1916) (by Ye Kuang)
• [async] Support SFG-level DSE for scalar SNodes ([async] Support SFG-level DSE for scalar SNodes #1907) (by Ye Kuang)
• [Example] Fix rounding error for cornell_box.py ([Example] Fix rounding error for cornell_box.py #1908) (by 蕉太狼)
• [async] Add advection benchmark ([async] Add advection benchmark #1914) (by Yuanming Hu)
• [example] Update mpm_lagrangian_forces.py ([example] Update mpm_lagrangian_forces.py #1910) (by Yuanming Hu)
• [doc] Use "atan2(y, x)" instead of "atan2(x, y)" ([doc] Use "atan2(y, x)" instead of "atan2(x, y)" #1816) ([doc] Use "atan2(y, x)" instead of "atan2(x, y)" (#1816) #1903) (by Tony)
• [metal] Add KernelManagerData in prep for pointer SNode ([metal] Add KernelManagerData in prep for pointer SNode #1895) (by Ye Kuang)
• [perf] Wrap clear loss/grad into a kernel ([perf] Wrap clear loss/grad into a kernel #1902) (by Ye Kuang)

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[codecov]

Codecov Report

Merging #1918 into master will decrease coverage by 0.94%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1918      +/-   ##
==========================================
- Coverage   43.86%   42.91%   -0.95%     
==========================================
  Files          45       45              
  Lines        6199     6410     +211     
  Branches     1101     1101              
==========================================
+ Hits         2719     2751      +32     
- Misses       3311     3489     +178     
- Partials      169      170       +1     

Impacted Files	Coverage Δ
python/taichi/lang/ops.py	43.35% <0.00%> (-9.10%)	⬇️
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	64.10% <0.00%> (-2.75%)	⬇️
python/taichi/lang/transformer.py	81.37% <0.00%> (-0.65%)	⬇️
python/taichi/lang/shell.py	14.81% <0.00%> (-0.57%)	⬇️
python/taichi/lang/util.py	32.54% <0.00%> (-0.39%)	⬇️
python/taichi/main.py	22.60% <0.00%> (-0.36%)	⬇️
python/taichi/misc/gui.py	8.61% <0.00%> (-0.20%)	⬇️
... and 9 more

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