Error compiling ConstantProp.cpp

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#1

Hi

While compiling the ConstantProp.cpp I am getting the following error.

error: too few arguments to function ‘llvm::Constant* llvm::ConstantFoldInstruction(
llvm::Instruction*, llvm::LLVMContext&, const llvm::TargetData*)

I am using llvm-2.6 and the ConstProp.cpp file is http://llvm.org/docs/doxygen/html/ConstantProp_8cpp_source.html

and the exact error message is:

llvm[0]: Compiling ConstantProp.cpp for Release build (PIC)
/home/tarun/Desktop/compiler/
LLVM/llvm-2.6/include/llvm/Analysis/ConstantFolding.h: In member function ‘virtual bool::ConstantPropagation::runOnFunction(llvm::Function&)’:
/home/tarun/Desktop/compiler/LLVM/llvm-2.6/include/llvm/Analysis/ConstantFolding.h:32: error: too few arguments to function ‘llvm::Constant* llvm::ConstantFoldInstruction(llvm::Instruction*, llvm::LLVMContext&, const llvm::TargetData*)’
/home/tarun/Desktop/compiler/LLVM/llvm-2.6/lib/Transforms/Hello/ConstantProp.cpp:71: error: at this point in file
make: *** [/home/tarun/Desktop/compiler/LLVM/build/lib/Transforms/Hello/Release/ConstantProp.o] Error 1

Regards
Tarun

#2

Hi

While compiling the ConstantProp.cpp I am getting the following error.

Is ConstantProp.cpp from a version of LLVM other than LLVM 2.6?

LLVM’s internal API changes between releases, so a source file written for one version of LLVM will not necessarily compile against an earlier or later version of LLVM.

As an aside, I’ve been told that writing transformations using IRBuilder tends to require fewer changes between LLVM releases, although I haven’t tried using it myself yet.

– John T.