-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 07/14/11 10:16, Ulrich Weigand wrote: > 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 ... Good point.
Perhaps the mmix guys can chime in... jeff -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJOJLblAAoJEBRtltQi2kC7MooH/jtwOEUwgcQIcpwARVrw53z9 geVKsQopLPkAx8WAPNxxJqwpmD61laQN9ZPPWE2E4SvXiGrnp9uBZYliG64/AC/G lmUPwjYJHICHzVfhewvS1nX0u93de9U0q8hLSqignJCA/FOjxwzr4BXe8rd0089Y xf84bwaIECb1r0gaG/W5MQodzA0OwOHuRj3YLDd1EZYb4TZQf2XCsNVe1eDmDj4C ddhCx187nITOZT1S1CvohI9aUenZxyt+qDEm7VmjZqI62lZqphiN2+caaVjzwlV1 TaVk6Beg+hdT0lqL92/7vUvcEZanzrdpWa1I22oXlTAK/01zVENZ6uOS8oi4s+A= =BYni -----END PGP SIGNATURE-----
