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/PrintRTL.ml | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'backend/PrintRTL.ml') diff --git a/backend/PrintRTL.ml b/backend/PrintRTL.ml index ce2275cf..78ce1816 100644 --- a/backend/PrintRTL.ml +++ b/backend/PrintRTL.ml @@ -72,11 +72,9 @@ let print_instruction pp (pc, i) = ros fn regs args | Ibuiltin(ef, args, res, s) -> fprintf pp "%a = %s(%a)\n" - reg res (name_of_external ef) regs args; - print_succ pp s (pc - 1) - | Iannot(ef, args, s) -> - fprintf pp "%s(%a)\n" - (name_of_external ef) (print_annot_args reg) args; + (print_builtin_res reg) res + (name_of_external ef) + (print_builtin_args reg) args; print_succ pp s (pc - 1) | Icond(cond, args, s1, s2) -> fprintf pp "if (%a) goto %d else goto %d\n" -- cgit