collinr@xxxxxxxxxxxxxxx writes: > 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? The internal documentation is out of date. The flow code was removed, and replaced by the dataflow infrastructure in df*.[ch]. Ian
