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/PrintLTL.ml | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'backend/PrintLTL.ml') diff --git a/backend/PrintLTL.ml b/backend/PrintLTL.ml index 27936f9b..0f78bc58 100644 --- a/backend/PrintLTL.ml +++ b/backend/PrintLTL.ml @@ -79,10 +79,9 @@ let print_instruction pp succ = function fprintf pp "tailcall %a" ros fn | Lbuiltin(ef, args, res) -> fprintf pp "%a = %s(%a)" - mregs res (name_of_external ef) mregs args - | Lannot(ef, args) -> - fprintf pp "%s(%a)\n" - (name_of_external ef) (print_annot_args loc) args + (print_builtin_res mreg) res + (name_of_external ef) + (print_builtin_args loc) args | Lbranch s -> print_succ pp s succ | Lcond(cond, args, s1, s2) -> -- cgit