Cyrille Mescam wrote:> Morning, > > I would like to know if you received my mail with the assembly code > you wanted. > > It not, i'll send it again to you. > > Thanks for your help. > > Regards. > > Cyrille >I've looked into the files you sent me, and it seems that the problem is occuring due to the C library simplication pass (which is run by gccas). What appears to be happening is that a call to fprintf() is being changed to a call to fwrite(), but this transform is being done incorrectly because the fprintf() is being passed a ubyte * while fwrite() takes an sbyte *. I'm creating a reduced testcase right now, but in the meantime, I'd like for you to try something. This should work around the problem that you're having (as well as verify that I understand the problem): Go into your LLVM source tree and comment out the following line in llvm/tools/gccas/gccas.cpp: addPass(PM, createSimplifyLibCallsPass()); // Library Call Optimizations Rebuild gccas. Then, try to build the LLVM GCC frontend again. Please email the llvmdev list and let us know if it works. In the meantime, I will continue to try to get a reduced test case and either fix the bug or hand it off to Reid (the author of the C library simplification pass). -- John T. -- John T. Criswell Research Programmer University of Illinois at Urbana-Champaign "It's today!" said Piglet. "My favorite day," said Pooh.
Chris Lattner wrote:> On Tue, 28 Jun 2005, John Criswell wrote: > >> addPass(PM, createSimplifyLibCallsPass()); // Library Call >> Optimizations >> >> Rebuild gccas. Then, try to build the LLVM GCC frontend again. >> Please email the llvmdev list and let us know if it works. >> >> In the meantime, I will continue to try to get a reduced test case and >> either fix the bug or hand it off to Reid (the author of the C library >> simplification pass). > > > Please file a PR for this. If noone else beats me to it, I will look > into it tonight. However, feel free to beat me to it. :)But of course. I'm just waiting for bugpoint to finishing chomping on it. :)> > -Chris >-- John T. -- John T. Criswell Research Programmer University of Illinois at Urbana-Champaign "It's today!" said Piglet. "My favorite day," said Pooh.
On Tue, 28 Jun 2005, John Criswell wrote:> addPass(PM, createSimplifyLibCallsPass()); // Library Call Optimizations > > Rebuild gccas. Then, try to build the LLVM GCC frontend again. Please email > the llvmdev list and let us know if it works. > > In the meantime, I will continue to try to get a reduced test case and either > fix the bug or hand it off to Reid (the author of the C library > simplification pass).Please file a PR for this. If noone else beats me to it, I will look into it tonight. However, feel free to beat me to it. :) -Chris -- http://nondot.org/sabre/ http://llvm.cs.uiuc.edu/
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