Good morning,
I am working on gcc, and I am looking for information about "liveness
analysis". The manual gccint.pdf says on page 101 :
"Life analysis
This pass computes which pseudo-registers are live at each point in
the program, and makes the first instruction that uses a value point
at the instruction that computed the value. It then deletes
computations whose results are never used, and combines memory
references with add or subtract instructions to make autoincrement or
autodecrement addressing. The pass is located in ?flow.c?."
However, I found flow.c in gcc-3.3, but not in gcc-4.3.1
Could you explain me that?
Regards,
Rémi Collin
