[PATCH] D99160: [X86][FastISEL] Support DW_TAG_call_site_parameter with FastISEL
    Paul Robinson via Phabricator via llvm-commits 
    llvm-commits at lists.llvm.org
       
    Thu Apr  1 17:44:03 PDT 2021
    
    
  
probinson added a comment.
FastISel is normally used only at -O0, I wouldn't expect any parameters to be optimized out at -O0.
The test is running llc with default optimization, which is -O2, and forcing fast-isel; this is not a usual combination and I wouldn't expect us to spend any effort making sure debug info works well with that combination.
If flang is forcing fast-isel even with optimization, that sounds like a problem for flang to solve, not LLVM.
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