internal/cabi: call optimization

[visualfc]

call optimization: check IR alloca/load/store => direct ptr / bitcast / memcpy

transform func body

func params

• AttrPointer (byval) : check alloca ptr
• AttrWidthType : bitcast, check alloca ptr
• AttrWidthType2: bitcast, check alloca ptr
• AttrExtract: none

func results

• AttrPointer sret : check memcpy
• AttrWidthType : check alloca ptr, bitcast
• AttrWidthType2: check alloca ptr, bitcast
• AttrExtract: none

transform call instr

• AttrPointer sret : check direct ptr
• AttrPointer (byval) : check direct ptr or memcpy( unsupport byval, arm/arm64 )
• AttrWidthType
• AttrWidthType2
• AttrExtract

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.22%. Comparing base (b1d95bb) to head (dd50d4d).
⚠️ Report is 33 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1272      +/-   ##
==========================================
+ Coverage   90.17%   90.22%   +0.05%     
==========================================
  Files          42       42              
  Lines       11796    11898     +102     
==========================================
+ Hits        10637    10735      +98     
- Misses       1026     1030       +4     
  Partials      133      133              

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