Hi All!
"rguenth at gcc dot gnu.org" <gcc-bugzi...@gcc.gnu.org> writes: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111166 ... > > > At RTL expansion time we store to D.2865 where it's DECL_RTL is r82:TI so > we can hardly fix it there. Only a later pass could figure each of the > insns fully define the reg. > > Jiufu Guo is working to improve what we choose for DECL_RTL, but for > incoming params / outgoing return. This is a case where we could, > with -fno-tree-vectorize, improve DECL_RTL for an automatic var and > choose not TImode but something like a (concat:TI reg:DI reg:DI). Here is the patch about improving the parameters and returns in registers. https://gcc.gnu.org/pipermail/gcc-patches/2023-August/628213.html I have a question about how to bind an RTL to a TREE expression. In this patch, a map TREE->RTL is used. But it would be better if there was a faster way. We have DECL_RTL/INCOMING_RTL, but they can only be bound to DECL(or PARM). In the above patch, the TREE can be an EXPR (e.g. COMPONENT_REF/ARRAY_REF). Is there a way to achieve this? Thanks for suggestions! BR, Jeff (Jiufu Guo)
