Jeff Law wrote: > On 06/15/11 21:46, Hans-Peter Nilsson wrote: > > PR rtl-optimization/48542 > > * reload.c (find_equiv_reg): Stop looking when finding a > > setjmp-type call. > > * reload1.c (reload_as_needed): Invalidate all reload > > registers when crossing a setjmp-type call. > OK. > Jeff
I see that this went already in, but I'm wondering why this change should be necessary. As far as register use is concerned, setjmp ought to behave just like a regular function: if a register is call-clobbered, reload will not attempt to use it across a function call (*any* function call) anyway; but if the register is call-saved, setjmp really ought to restore the old value, *both* times it returns, and so reuse ought to be allowed ... Bye, Ulrich -- Dr. Ulrich Weigand GNU Toolchain for Linux on System z and Cell BE ulrich.weig...@de.ibm.com
