[LLVMbugs] [Bug 1145] NEW: Support nothrow attribute on function calls

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Tue Jan 30 09:23:14 PST 2007


           Summary: Support nothrow attribute on function calls
           Product: libraries
           Version: 1.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Core LLVM classes
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sabre at nondot.org

With exception table support under development, it will soon be useful to know if a function can throw or 
not.  The front-end has this info for some functions (those marked throw()) and the prune-eh pass 
computes this info, but there is no way to record this info in the IR for the code generator to use.

It should be straight-forward to add an attribute to functions to indicate that they cannot throw.  If the 
front-end sets this, it will make the prune-eh pass more effective (deleting more landing pads) and the 
code generator can then start using it.


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