On Tue, 30 Oct 2018 at 02:16, John Carter wrote: > > https://gcc.godbolt.org/z/6c4QLO > > Something changed between gcc 4.1 and 4.4 I think this changed with https://gcc.gnu.org/r143570 to fix https://gcc.gnu.org/PR38615 See https://gcc.gnu.org/ml/gcc/2008-11/msg00201.html and https://gcc.gnu.org/ml/gcc/2008-11/msg00202.html for a more complete explanation of why the 4.1 behaviour is non-conforming and had to be fixed. If you use -fmerge-all-constants you get the old behaviour back, but as noted in the manual that option makes the program non-confirming. If your program doesn't rely on stack variables having distinct addresses in recursive calls, you can probably use that option safely.
