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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hi,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>My application generates some C code which I then compile using LLVM+Clang before running it. For the compilation side of things, I have a class which one of the methods (the </span>CompilerEngine::compileCode() method in <a href="https://raw.github.com/opencor/opencor/llvm_3.3/src/plugins/misc/Compiler/src/compilerengine.cpp">https://raw.github.com/opencor/opencor/llvm_3.3/src/plugins/misc/Compiler/src/compilerengine.cpp</a>) is based on the code from the <span lang=EN-US>clang-interpreter example (</span><a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/examples/clang-interpreter/main.cpp?view=co">http://llvm.org/viewvc/llvm-project/cfe/trunk/examples/clang-interpreter/main.cpp?view=co</a>). The idea is therefore to create an instance of the ‘compiler’ class and, among other things, use its compileCode() whenever needed.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>All of this works perfectly fine using LLVM+Clang 3.2, but not with LLVM+Clang 3.3. At least, not out of the box. Basically, the first time I try to compile some C code, everything is fine. However, if I try to compile some other C code, then I will get the following error message:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-indent:36.0pt'><span lang=EN-US>clang: for the -vectorize-loops option: may only occur zero or one times! <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>FWIW, I use the -O3 option which I understand makes implicit use of the loop vectorizer, and that seems to be the problem. Indeed, if I disable the loop vectorizer (using the -fno-vectorize option), then everything is fine but I clearly don’t want to have to do that. So, right now, my solution consists of commenting out the test for the number of option occurrences in the Option::addOccurrence() method (<a href="http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/CommandLine.cpp?view=co">http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/CommandLine.cpp?view=co</a>), but it is clearly not satisfactory either (even though it’s good enough for my particular purpose).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>So, would anyone have any idea about what I might be missing, if anything?... <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Cheers, Alan.<o:p></o:p></span></p></div></body></html>