I am trying to generate the LLVM IR of a swift program, run a pass on it and then compile this down to an executable to run it. I identified the variables that are linked against the executable when compiled with swiftc directly and linked them. However, when I run the executable it causes a segmentation fault. This works fine for simple programs that do not make use of any data structures but as soon as I use arrays and have to link against a certain library it causes the problem. A replicable example would be the following:
Swift version I am using is 5.1
var list = [1, 3, 4, 5]; var temp = 0; list = 1; temp = list;
I get the llvm ir (I need the Onone debug version)
swiftc -g -Onone -emit-llvm
I get the required libraries with ldd from the executable created without emitting the IR.
I then like the libraries with clang as llc does not accept llvm ir as input. I link the libraries and that works just fine however when I run the problem I get a segmentation fault and I cannot understand why. does anybody have an idea?