From 3771b9b2173ecb10fa517d522755cda6be21403c Mon Sep 17 00:00:00 2001 From: Richard Kenner Date: Sat, 2 Oct 1993 14:06:03 -0400 Subject: [PATCH] (make_decl_rtl): Set TREE_SIDE_EFFECTS on global if -fvolatile-global. From-SVN: r5559 --- gcc/varasm.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/gcc/varasm.c b/gcc/varasm.c index e989a95b1f8..e39f54686d6 100644 --- a/gcc/varasm.c +++ b/gcc/varasm.c @@ -468,10 +468,17 @@ make_decl_rtl (decl, asmspec, top_level) DECL_RTL (decl) = gen_rtx (MEM, DECL_MODE (decl), gen_rtx (SYMBOL_REF, Pmode, name)); - if (TREE_THIS_VOLATILE (decl) - || (flag_volatile_global && TREE_CODE (decl) == VAR_DECL - && TREE_PUBLIC (decl))) + + /* If this variable is to be treated as volatile, show its + tree node has side effects. If it has side effects, either + because of this test or from TREE_THIS_VOLATILE also + being set, show the MEM is volatile. */ + if (flag_volatile_global && TREE_CODE (decl) == VAR_DECL + && TREE_PUBLIC (decl)) + TREE_SIDE_EFFECTS (decl) = 1; + if (TREE_SIDE_EFFECTS (decl)) MEM_VOLATILE_P (DECL_RTL (decl)) = 1; + if (TREE_READONLY (decl)) RTX_UNCHANGING_P (DECL_RTL (decl)) = 1; MEM_IN_STRUCT_P (DECL_RTL (decl)) -- 2.30.2