From 54f97d1988f623ba7422e13a504caeb5701ba93c Mon Sep 17 00:00:00 2001 From: Xavier Leroy Date: Fri, 21 Aug 2015 11:05:36 +0200 Subject: Refactoring of builtins and annotations in the back-end. Before, the back-end languages had distinct instructions - Iannot for annotations, taking structured expressions (annot_arg) as arguments, and producing no results' - Ibuiltin for other builtins, using simple pseudoregs/locations/registers as arguments and results. This branch enriches Ibuiltin instructions so that they take structured expressions (builtin_arg and builtin_res) as arguments and results. This way, - Annotations fit the general pattern of builtin functions, so Iannot instructions are removed. - EF_vload_global and EF_vstore_global become useless, as the same optimization can be achieved by EF_vload/vstore taking a structured argument of the "address of global" kind. - Better code can be generated for builtin_memcpy between stack locations, or volatile accesses to stack locations. Finally, this commit also introduces a new kind of external function, EF_debug, which is like EF_annot but produces no observable events. It will be used later to transport debug info through the back-end, without preventing optimizations. --- backend/XTL.mli | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'backend/XTL.mli') diff --git a/backend/XTL.mli b/backend/XTL.mli index 9794565c..6bdcc8c6 100644 --- a/backend/XTL.mli +++ b/backend/XTL.mli @@ -35,8 +35,7 @@ type instruction = | Xstore of memory_chunk * addressing * var list * var | Xcall of signature * (var, ident) sum * var list * var list | Xtailcall of signature * (var, ident) sum * var list - | Xbuiltin of external_function * var list * var list - | Xannot of external_function * var annot_arg list + | Xbuiltin of external_function * var builtin_arg list * var builtin_res | Xbranch of node | Xcond of condition * var list * node * node | Xjumptable of var * node list -- cgit