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/Linearize.v | 2 -- 1 file changed, 2 deletions(-) (limited to 'backend/Linearize.v') diff --git a/backend/Linearize.v b/backend/Linearize.v index b1102e23..78cdd743 100644 --- a/backend/Linearize.v +++ b/backend/Linearize.v @@ -187,8 +187,6 @@ Fixpoint linearize_block (b: LTL.bblock) (k: code) : code := Ltailcall sig ros :: k | LTL.Lbuiltin ef args res :: b' => Lbuiltin ef args res :: linearize_block b' k - | LTL.Lannot ef args :: b' => - Lannot ef args :: linearize_block b' k | LTL.Lbranch s :: b' => add_branch s k | LTL.Lcond cond args s1 s2 :: b' => -- cgit