llgo/ssa: introduce rawType; MakeClosure

[xushiwei]

No description provided.

[qiniu-x]

[Git-flow] Hi @xushiwei, There are some suggestions for your information:

---

Rebase suggestions

• Following commits seems generated via git merge

  Merge remote-tracking branch 'gop/main' into q

Which seems insignificant, recommend to use git rebase command to reorganize your PR.

For other git-flow instructions, recommend refer to these examples.

Details

If you have any questions about this comment, feel free to raise an issue here:

• https://github.com/qiniu/reviewbot

[codecov]

Codecov Report

Attention: Patch coverage is 99.08815% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 95.39%. Comparing base (92f56a2) to head (6f679c0).

Files	Patch %	Lines
ssa/expr.go	93.87%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #107      +/-   ##
==========================================
+ Coverage   95.29%   95.39%   +0.10%     
==========================================
  Files           8        8              
  Lines        1615     1695      +80     
==========================================
+ Hits         1539     1617      +78     
- Misses         60       62       +2     
  Partials       16       16              

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