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re PR middle-end/27657 (bogus undefined reference error to static var with -g and -O)

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2007-01-30  Richard Guenther  <rguenther@suse.de>

	PR middle-end/27657
	* dwarf2out.c (reference_to_unused): Query varpool if the
	variable was output.

	* g++.dg/debug/pr27657.C: New testcase.

From-SVN: r121335
This commit is contained in:
Richard Guenther 2007-01-30 10:23:01 +00:00 committed by Richard Biener
parent 91851351be
commit 9b1959ffca
4 changed files with 28 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2007-01-30 Richard Guenther <rguenther@suse.de>
PR middle-end/27657
* dwarf2out.c (reference_to_unused): Query varpool if the
variable was output.
2007-01-30 Richard Guenther <rguenther@suse.de>
PR middle-end/30313

10
gcc/dwarf2out.c
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@ -10045,8 +10045,14 @@ reference_to_unused (tree * tp, int * walk_subtrees,
if (DECL_P (*tp) && ! TREE_PUBLIC (*tp) && ! TREE_USED (*tp)
&& ! TREE_ASM_WRITTEN (*tp))
return *tp;
else
return NULL_TREE;
else if (DECL_P (*tp) && TREE_CODE (*tp) != FUNCTION_DECL)
{
struct varpool_node *node = varpool_node (*tp);
if (!node->needed)
return *tp;
}
return NULL_TREE;
}
/* Generate an RTL constant from a decl initializer INIT with decl type TYPE,

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2007-01-30 Richard Guenther <rguenther@suse.de>
PR middle-end/27657
* g++.dg/debug/pr27657.C: New testcase.
2007-01-30 Richard Guenther <rguenther@suse.de>
PR middle-end/30313

9
gcc/testsuite/g++.dg/debug/pr27657.C Normal file
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@ -0,0 +1,9 @@
/* { dg-do link } */
const char s[] = "";
const char *const p = s;
int main()
{
return 0;
}