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From 62593aed2e6b228ae5b85fb9721b45cc92cce894 Mon Sep 17 00:00:00 2001
From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 23 May 2011 18:12:34 +0000
Subject: [PATCH] PR debug/49032
* dbxout.c: Include cgraph.h.
(dbxout_expand_expr): If a VAR_DECL is TREE_STATIC, not written
and without value expr, return NULL if no varpool node exists for
it or if it is not needed.
* Makefile.in (dbxout.o): Depend on $(CGRAPH_H).
* gcc.dg/debug/pr49032.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@174084 138bc75d-0d04-0410-961f-82ee72b054a4
index 792ca6c..60dcee5 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -2921,7 +2921,8 @@ optabs.o : optabs.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) \
dbxout.o : dbxout.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(TREE_H) \
$(RTL_H) $(FLAGS_H) $(REGS_H) debug.h $(TM_P_H) $(TARGET_H) $(FUNCTION_H) \
langhooks.h insn-config.h reload.h $(GSTAB_H) xcoffout.h output.h dbxout.h \
- toplev.h $(DIAGNOSTIC_CORE_H) $(GGC_H) $(OBSTACK_H) $(EXPR_H) gt-dbxout.h
+ toplev.h $(DIAGNOSTIC_CORE_H) $(GGC_H) $(OBSTACK_H) $(EXPR_H) $(CGRAPH_H) \
+ gt-dbxout.h
debug.o : debug.c debug.h $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(TREE_H)
sdbout.o : sdbout.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) debug.h \
$(TREE_H) $(GGC_H) $(RTL_H) $(REGS_H) $(FLAGS_H) insn-config.h \
diff --git a/gcc/dbxout.c b/gcc/dbxout.c
index 3b0cf34..836030d 100644
--- a/gcc/dbxout.c
+++ b/gcc/dbxout.c
@@ -1,7 +1,7 @@
/* Output dbx-format symbol table information from GNU compiler.
Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
- Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
+ 2011 Free Software Foundation, Inc.
This file is part of GCC.
@@ -91,6 +91,7 @@ along with GCC; see the file COPYING3. If not see
#include "langhooks.h"
#include "obstack.h"
#include "expr.h"
+#include "cgraph.h"
#ifdef XCOFF_DEBUGGING_INFO
#include "xcoffout.h"
@@ -2393,6 +2394,20 @@ dbxout_expand_expr (tree expr)
disable debug info for these variables. */
if (!targetm.have_tls && DECL_THREAD_LOCAL_P (expr))
return NULL;
+ if (TREE_STATIC (expr)
+ && !TREE_ASM_WRITTEN (expr)
+ && !DECL_HAS_VALUE_EXPR_P (expr)
+ && !TREE_PUBLIC (expr)
+ && DECL_RTL_SET_P (expr)
+ && MEM_P (DECL_RTL (expr)))
+ {
+ /* If this is a var that might not be actually output,
+ return NULL, otherwise stabs might reference an undefined
+ symbol. */
+ struct varpool_node *node = varpool_get_node (expr);
+ if (!node || !node->needed)
+ return NULL;
+ }
/* FALLTHRU */
case PARM_DECL:
new file mode 100644
index 0000000..3985040
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/debug/pr49032.c
@@ -0,0 +1,11 @@
+/* PR debug/49032 */
+/* { dg-do link } */
+
+static int s = 42;
+
+int
+main ()
+{
+ int *l[18] = { &s, &s, &s, &s, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+ return 0;
+}
--
1.7.0.4
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