yihanaa added a comment.

This is unfortunately true, unless we generate some code that calculates the 
length of the string at runtime. I find it difficult to draw the line between 
defining this built-in functionality and developers developing printf-like 
functionality, if built-in does too much, flexibility will decrease, if 
built-in does less, (features like length limits) then develop personnel may 
need to do some work.   o(≧口≦)o


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D124221/new/

https://reviews.llvm.org/D124221

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