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...t; call V->dump() output>> declare void @_Unwind_Resume(i8*) Now the funny thing is I don't call this function, it gets inserted into my code when I generate a "resume" instruction using IRBuilder::CreateResume for exception handling. I've tried adding a declaration for _UnwindResume myself but that doesn't do anything. Any help would be appreciated. Best, Christian Schafmeister -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121225/02b7a326/attachment.html>

...__finally, but cleanups in > general are implemented with a fundamentally different approach. > > During phase 2 of Itanium EH unwinding, control is propagated back up the > stack. To run a cleanup, the stack is cleared, control enters the landing > pad, and propagation resumes when _UnwindResume is called. > > On Windows, things work differently. Instead, during phase 2, each > personality function is invoked a second time, wherein it must execute all > cleanups *without clearing the stack* before returning control to the > runtime where the runtime continues its loop over t...

...plementing cleanups with __finally, but cleanups in general are implemented with a fundamentally different approach. During phase 2 of Itanium EH unwinding, control is propagated back up the stack. To run a cleanup, the stack is cleared, control enters the landing pad, and propagation resumes when _UnwindResume is called. On Windows, things work differently. Instead, during phase 2, each personality function is invoked a second time, wherein it must execute all cleanups *without clearing the stack* before returning control to the runtime where the runtime continues its loop over the stack frames. You can...

...r and selector value as arguments: rewind <ptr>, <i32> The codegenerators would lower this to a call to _Unwind_Resume (the second selector argument would not be used - it only exists to simplify inlining, see below - the first, exception, argument would be passed as the parameter of _UnwindResume). The goal here is to simplify inlining and avoid explicitly dragging in library functions like _Unwind_Resume. It is possible to do without this new instruction, but I think it represents an improvement so I include it here. An example ---------- Here is a technique for auto-generating example...