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dbxout.c (dbxout_symbol_location): Resolve constant pool references even for variables with NULL DECL_INITIAL.

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ChangeLog:
	* dbxout.c (dbxout_symbol_location): Resolve constant pool references
	even for variables with NULL DECL_INITIAL.

testsuite/ChangeLog:
	* gcc.dg/20041216-1.c: New test.

From-SVN: r94303
This commit is contained in:
Ulrich Weigand 2005-01-27 01:49:01 +00:00 committed by Ulrich Weigand
parent 4356a1bf59
commit 9ff93eb01c
4 changed files with 63 additions and 31 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2005-01-26 Ulrich Weigand <uweigand@de.ibm.com>
* dbxout.c (dbxout_symbol_location): Resolve constant pool references
even for variables with NULL DECL_INITIAL.
2005-01-26 Stuart Hastings <stuart@apple.com>
* gcc/gimplify.c (shortcut_cond_expr): Re-compute side-effects.

62
gcc/dbxout.c
View File

@ -2733,6 +2733,37 @@ dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home)
letter = decl_function_context (decl) ? 'V' : 'S';
/* Some ports can transform a symbol ref into a label ref,
because the symbol ref is too far away and has to be
dumped into a constant pool. Alternatively, the symbol
in the constant pool might be referenced by a different
symbol. */
if (GET_CODE (addr) == SYMBOL_REF
&& CONSTANT_POOL_ADDRESS_P (addr))
{
bool marked;
rtx tmp = get_pool_constant_mark (addr, &marked);
if (GET_CODE (tmp) == SYMBOL_REF)
{
addr = tmp;
if (CONSTANT_POOL_ADDRESS_P (addr))
get_pool_constant_mark (addr, &marked);
else
marked = true;
}
else if (GET_CODE (tmp) == LABEL_REF)
{
addr = tmp;
marked = true;
}
/* If all references to the constant pool were optimized
out, we just ignore the symbol. */
if (!marked)
return 0;
}
/* This should be the same condition as in assemble_variable, but
we don't have access to dont_output_data here. So, instead,
we rely on the fact that error_mark_node initializers always
@ -2747,37 +2778,6 @@ dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home)
code = DBX_STATIC_CONST_VAR_CODE;
else
{
/* Some ports can transform a symbol ref into a label ref,
because the symbol ref is too far away and has to be
dumped into a constant pool. Alternatively, the symbol
in the constant pool might be referenced by a different
symbol. */
if (GET_CODE (addr) == SYMBOL_REF
&& CONSTANT_POOL_ADDRESS_P (addr))
{
bool marked;
rtx tmp = get_pool_constant_mark (addr, &marked);
if (GET_CODE (tmp) == SYMBOL_REF)
{
addr = tmp;
if (CONSTANT_POOL_ADDRESS_P (addr))
get_pool_constant_mark (addr, &marked);
else
marked = true;
}
else if (GET_CODE (tmp) == LABEL_REF)
{
addr = tmp;
marked = true;
}
/* If all references to the constant pool were optimized
out, we just ignore the symbol. */
if (!marked)
return 0;
}
/* Ultrix `as' seems to need this. */
#ifdef DBX_STATIC_STAB_DATA_SECTION
data_section ();

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2005-01-26 Ulrich Weigand <uweigand@de.ibm.com>
* gcc.dg/20041216-1.c: New test.
2005-01-26 Alexander Malmberg <alexander@malmberg.org>
PR objc/18862

23
gcc/testsuite/gcc.dg/20041216-1.c Normal file
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@ -0,0 +1,23 @@
/* This test case would get an unresolved symbol during link
because stabs referred to an optimized-away literal pool
entry. */
/* { dg-do run { target s390*-*-* } } */
/* { dg-options "-O2 -fno-omit-frame-pointer -gstabs" } */
int main (void)
{
static char buf[4096];
char *p;
do
{
p = buf;
asm volatile ("" : : : "memory", "0", "1", "2", "3", "4", "5", "6",
"7", "8", "9", "10", "12");
}
while (*p);
return 0;
}