Steven Bosscher wrote: > Hi rth, > > The stack space sharing you added to cfgexpand.c breaks RTL alias > analysis. > > For example, the attached test case breaks for pentiumpro at -O2. > The problem apparently is that the second store to c is moved up > before before the load.
My guess at a solution is that when A (with alias set S_a) and B (with alias set S_b) are given the same stack slot, we should create a new alias set S_c which is a subset of both S_a and S_b, and give the combined stack slot that aliase set. -- Mark Mitchell CodeSourcery, LLC [EMAIL PROTECTED] (650) 331-3385 x713
