Link-time optimisation (LTO)

[Kagamin]

On Friday, 30 March 2018 at 10:23:15 UTC, Cecil Ward wrote:
> My principal question: If I successfully do this, with GCC or 
> LDC, will I be able to get the code for the externally defined 
> short routine expanded inline and fully integrated into the 
> generated code that corresponds to the calling source code? (So 
> no ‘call’ instruction is even found.)

If you compile for lto, ldc compiles code to IR and linker 
generates machine code from IR with inlining, at the IR level 
most information about source code is lost, only the actual code 
remains, declarations are purely source code items. But it only 
inline IR code, machine code can't be inlined.