https://bugs.llvm.org/show_bug.cgi?id=41193

            Bug ID: 41193
           Summary: -warn-stack-size not issuing warning
           Product: new-bugs
           Version: 6.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedb...@nondot.org
          Reporter: n...@indigorenderer.com
                CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org

Created attachment 21649
  --> https://bugs.llvm.org/attachment.cgi?id=21649&action=edit
optimised LLVM IR

I'm using the C++ LLVM API, and also setting -warn-stack-size=0, so any stack
usage greater than zero bytes should give me a warning (via a callback).
However I get not warning from the attached code.

This looks like a bug since the function f_int64_ uses 64 bytes of stacks
space.

Platform LLVM 6.0, Linux x64

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