Consider the following files
foo.h
class Foo
{
Foo();
Foo(int x);
void bar();
}
foo.cc
# include foo.h
Foo::Foo() {}
Foo::Foo(int x) {}
void Foo::bar() {}
When compiling these files to LLVM bitcode foo.bc as follows
clang++ -c -o foo.bc -emit-llvm foo.cc
the resulting LLVM bitcode file, foo.bc contains two symbols for every constructor definition but only one symbol for the function definition. Why is this?
I have tested this on both LLVM versions 3.4 and 4.0.1, and the behaviour occurs with both versions. For reference, here is the output of
llvm-nm foo.bc
T _ZN3Foo3barEv
T _ZN3FooC1Ei
T _ZN3FooC1Ev
T _ZN3FooC2Ei
T _ZN3FooC2Ev
-- Edit --
Based on milleniumbug's comment below, here is some additional information on complete object constructors: