From: Hans-Peter Nilsson <h...@bitrange.com> Date: Wed, 21 Sep 2011 21:27:08 -0400 (EDT)
> While revisiting VIS, *please* consider fixing a big usability > problem: the pack and aligndata builtins don't take GSR in > account; it has unknown state and might be changed as a > side-effect of a previous VIS insn (well, alignaddr). The > affected builtins don't have dependencies to GSR or a means to > set it besides in an asm; hardly usable at all. See PR48974. I know, see my posting from yesterday: -------------------- Subject: [PATCH] Use TREE_READONLY on some sparc VIS builtins While fiddling around with the VIS intrinsic builtins I noticed that none of them have TREE_READONLY set, so the resulting code can be terrible. We can't currently do this for alignaddr and faligndata because we don't model the way those instructions use the %gsr register. --------------------
