From 2f1553a4d5f3ad1885ba3fe308b4b6f3b75d2854 Mon Sep 17 00:00:00 2001 From: Richard Kenner Date: Wed, 8 Dec 1993 06:17:15 -0500 Subject: [PATCH] (mark_used_regs, case CLOBBER): Refine previous change to just look at the address of a MEM inside a CLOBBER. From-SVN: r6195 --- gcc/flow.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/gcc/flow.c b/gcc/flow.c index 7b89279e63b..d3836957f77 100644 --- a/gcc/flow.c +++ b/gcc/flow.c @@ -1,5 +1,5 @@ /* Data flow analysis for GNU compiler. - Copyright (C) 1987, 1988, 1992 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1992, 1993 Free Software Foundation, Inc. This file is part of GNU CC. @@ -2170,6 +2170,13 @@ mark_used_regs (needed, live, x, final, insn) return; #endif + case CLOBBER: + /* If we are clobbering a MEM, mark any registers inside the address + as being used. */ + if (GET_CODE (XEXP (x, 0)) == MEM) + mark_used_regs (needed, live, XEXP (XEXP (x, 0), 0), final, insn); + return; + case MEM: /* Invalidate the data for the last MEM stored. We could do this only if the addresses conflict, but this doesn't seem worthwhile. */