library(RLLVMCompile)
f =
function(x)
x != NULL
m = Module()
fc = compileFunction(f, Int1Type, pointerType(DoubleType), module = m)
.llvm(fc, c(1, 2))
.llvm(fc, new("externalptr"))
# getNULLPointer(pointerType(DoubleType)))
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