fix some non-ret and unused var warning

[jumormt]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 67.82%. Comparing base (0f01ec0) to head (57fa8b2).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1396      +/-   ##
==========================================
- Coverage   67.82%   67.82%   -0.01%     
==========================================
  Files         250      250              
  Lines       27646    27645       -1     
==========================================
- Hits        18751    18750       -1     
  Misses       8895     8895              

Files	Coverage Δ
svf-llvm/lib/LLVMUtil.cpp	77.80% <100.00%> (-0.07%)	⬇️
svf-llvm/lib/SVFIRBuilder.cpp	81.48% <100.00%> (ø)
svf-llvm/tools/AE/ae.cpp	100.00% <100.00%> (ø)
svf/include/Graphs/WTO.h	86.32% <ø> (ø)
svf/lib/AE/Svfexe/AbstractExecution.cpp	84.01% <ø> (ø)
svf/lib/AE/Svfexe/BufOverflowChecker.cpp	77.83% <ø> (ø)
svf/lib/AE/Svfexe/ICFGSimplification.cpp	100.00% <100.00%> (ø)
svf/lib/AE/Svfexe/SVFIR2ItvExeState.cpp	81.23% <ø> (ø)
svf/lib/MemoryModel/AccessPath.cpp	51.54% <0.00%> (ø)