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In my project I have a group of foreign types (C++ classes) that I want to use, but don't want to represent as structs within LLVM. For example, for each field in each C++ class I have a setter and getter function that I'd like to use. The setters and getters are "extern C" functions to avoid problems with C++'s name mangling. After going over the documentation it

...trip for a stub function? Two possible solutions come to mind: 1) Modify getGlobalValueAtAddress to work for pointers to stub functions 2) Add a getStubAtAddress Any other suggestions? Robert On Feb 10, 2008, at 3:41 PM, Chris Lattner wrote: > > On Feb 10, 2008, at 5:33 AM, Robert Zeh wrote: > >> I'm attempting to instrument virtual function calls in my code. >> After each virtual call I'm calling my own registerMethod function, >> with an integer marking the location of the call and a pointer to >> the function that was called. >> >&g...

Might I suggest the following patch, because this issue has bite me too? You're lured in by the initial good results from the Andersens alias analysis, only to discover the bugs later on. Robert Zeh On Aug 26, 2009, at 9:11 PM, Chris Lattner wrote: > On Aug 26, 2009, at 6:40 PM, Max Stonebraker wrote: >> Hello, >> >> Does the LLVM Andersens alias analysis handle function pointers >> precisely? I ran it and it looks like it says every function points >> points...

On Feb 12, 2008, at 5:08 PM, Robert Zeh wrote: > After hacking away at it for a bit, it looks like the mystery > function is actually a stub function. You know, I had this lengthy email written to cover all the details and I decided not to send it as I wasn't sure if that was what you were hitting a stub and I didn't...

On Aug 26, 2009, at 6:40 PM, Max Stonebraker wrote: > Hello, > > Does the LLVM Andersens alias analysis handle function pointers > precisely? I ran it and it looks like it says every function points > points to the universal set. Is this what I should expect? Hi Max, I don't know the answer offhand but please keep in mind that the current andersen's pass has many

You're right that LLVM may be left in an unusable state --- I've encountered that problem on my own. However, even a simple exit function would be useful. If, instead of calling abort, LLVM called a function pointer I provided life would be much easier. Even if the function call simply threw up a crash screen life would be better than calling abort. Ideally I'd like to throw

...ext part -------------- A non-text attachment was scrubbed... Name: intel-patch.diff Type: application/octet-stream Size: 386 bytes Desc: not available URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20090121/f7cdba39/attachment.obj> -------------- next part -------------- Robert Zeh

On Jan 7, 2010, at 11:48 AM, Chris Lattner <clattner at apple.com> wrote: > There is a fundamental difference between sqrt() and llvm.sqrt: the > former is defined on negative values and sets errno (on linux). The > later is undefined. Both work well for their stated purpose, > llvm.sqrt should not be slower than sqrt even on linux. Both > llvm.sqrt and sqrt could be much

On Jan 7, 2010, at 3:53 PM, Robert A. Zeh wrote: > > On Jan 7, 2010, at 11:48 AM, Chris Lattner <clattner at apple.com> wrote: > >> There is a fundamental difference between sqrt() and llvm.sqrt: the >> former is defined on negative values and sets errno (on linux). The >> later is undefined. Both work...

Is there a way to set how aggressive the inliner pass (createFunctionInliningPass) without going through the command line interface? Is there any reason InlineLimit isn't an argument to the createFunctionInliningPass function? Thanks, Robert

On Mon, 7 Jan 2008, Robert Zeh wrote: > Is there a way to set how aggressive the inliner pass > (createFunctionInliningPass) without going through the command line > interface? Nope. Well, you could call cl::ParseCommandLine yourself (passing in a static array) like llvm-gcc does, but other than that "no"....

...ype: application/octet-stream Size: 2654 bytes Desc: not available URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20080111/18fad7e6/attachment.obj> -------------- next part -------------- Robert On Jan 8, 2008, at 3:26 PM, Chris Lattner wrote: > On Mon, 7 Jan 2008, Robert Zeh wrote: >> Is there a way to set how aggressive the inliner pass >> (createFunctionInliningPass) without going through the command line >> interface? > > Nope. Well, you could call cl::ParseCommandLine yourself (passing > in a > static array) like llvm-gcc does, but...

On Feb 12, 2008, at 5:08 PM, Robert Zeh wrote: > After hacking away at it for a bit, it looks like the mystery function > is actually a stub function. The function pointer is coming from a > vtable, which gets filled in with pointers to stub functions. > > Is there any way to do the round trip for a stub function? Two &...

On Feb 10, 2008, at 5:33 AM, Robert Zeh wrote: > I'm attempting to instrument virtual function calls in my code. > After each virtual call I'm calling my own registerMethod function, > with an integer marking the location of the call and a pointer to > the function that was called. > > However, and this...

I'm inlining a bunch of C++ code, and I'm ending up with a bunch of basic blocks like this: filter441.i: ; preds = %unwind432.i call void @_ZSt9terminatev( ) unreachable filter453.i: ; preds = %unwind444.i call void @_ZSt9terminatev( ) unreachable It seems like I should be safe to merge these, but I can't find a pass to do so. Going over the open projects page it looks

On Oct 13, 2008, at 1:10 PM, Robert Zeh wrote: > > On Oct 13, 2008, at 1:07 PM, Chris Lattner wrote: >> >> Exceptions have a high cost in terms of code size, binary size, and >> even a bit of execution time. Also, they don't magically make the >> code safe from any error: code has to be designed specif...

On Oct 13, 2008, at 1:07 PM, Chris Lattner wrote: > > Exceptions have a high cost in terms of code size, binary size, and > even a bit of execution time. Also, they don't magically make the > code safe from any error: code has to be designed specifically to use > RAII and other techniques to handle exceptions properly. Reading a C+ > + trade magazines/books about EH topics

I'm attempting to instrument virtual function calls in my code. After each virtual call I'm calling my own registerMethod function, with an integer marking the location of the call and a pointer to the function that was called. However, and this is where I get confused, the function pointer doesn't match any of the functions in my module. I'd hoped to call

On Jan 7, 2010, at 4:04 PMPST, Chris Lattner wrote: > On Jan 7, 2010, at 3:53 PM, Robert A. Zeh wrote: > On Jan 7, 2010, at 11:48 AM, Chris Lattner <clattner at apple.com> wrote: >> >>> There is a fundamental difference between sqrt() and llvm.sqrt: the >>> former is defined on negative values and sets errno (on linux). The >>> later is undefined. B...

...ule); Next, I call my monster function and it works as expected. But if I uncomment the call to createAndersendsPass() my code fails (because something goes wrong with the dynamic cast). Is what I'm doing supposed to work? I have I missed something with the pass manager? Thanks, Robert Zeh