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gimple-fold.c (fold_gimple_assign): Properly build a null-pointer constant when devirtualizing addresses. 

2014-08-19  Richard Biener  <rguenther@suse.de>

	* gimple-fold.c (fold_gimple_assign): Properly build a
	null-pointer constant when devirtualizing addresses.

From-SVN: r214141
This commit is contained in:
Richard Biener 2014-08-19 11:19:52 +00:00 committed by Richard Biener
parent a98c0e91c7
commit 3ef276e442
2 changed files with 17 additions and 12 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2014-08-19 Richard Biener <rguenther@suse.de>
* gimple-fold.c (fold_gimple_assign): Properly build a
null-pointer constant when devirtualizing addresses.
2014-07-07 Mark Wielaard <mjw@redhat.com>
* dwarf2out.c (decl_quals): New function.

24
gcc/gimple-fold.c
View File

@ -319,14 +319,6 @@ fold_gimple_assign (gimple_stmt_iterator *si)
= possible_polymorphic_call_targets (rhs, stmt, &final);
if (final && targets.length () <= 1 && dbg_cnt (devirt))
{
tree fndecl;
if (targets.length () == 1)
fndecl = targets[0]->decl;
else
/* We can not use __builtin_unreachable here because it
can not have address taken. */
fndecl = integer_zero_node;
if (dump_enabled_p ())
{
location_t loc = gimple_location_safe (stmt);
@ -335,11 +327,19 @@ fold_gimple_assign (gimple_stmt_iterator *si)
"reference to function %s\n",
targets.length () == 1
? targets[0]->name ()
: "__builtin_unreachable");
: "NULL");
}
val = fold_convert (TREE_TYPE (val),
build_fold_addr_expr_loc (loc, fndecl));
STRIP_USELESS_TYPE_CONVERSION (val);
if (targets.length () == 1)
{
val = fold_convert (TREE_TYPE (val),
build_fold_addr_expr_loc
(loc, targets[0]->decl));
STRIP_USELESS_TYPE_CONVERSION (val);
}
else
/* We can not use __builtin_unreachable here because it
can not have address taken. */
val = build_int_cst (TREE_TYPE (val), 0);
return val;
}
}