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re PR c++/14179 (out of memory while parsing array with many initializers)

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2017-02-02  Richard Biener  <rguenther@suse.de>

	PR cp/14179
	* cp-gimplify.c (cp_fold): When folding a CONSTRUCTOR copy
	it lazily on the first changed element only and copy it
	fully upfront, only storing changed elements.

From-SVN: r245118
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Richard Biener 2017-02-02 08:55:44 +00:00 committed by Richard Biener
parent d8d58893e4
commit 27de0fab0f
2 changed files with 12 additions and 9 deletions
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7
gcc/cp/ChangeLog
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@ -1,3 +1,10 @@
2017-02-02 Richard Biener <rguenther@suse.de>
PR cp/14179
* cp-gimplify.c (cp_fold): When folding a CONSTRUCTOR copy
it lazily on the first changed element only and copy it
fully upfront, only storing changed elements.
2017-02-02 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/69637

14
gcc/cp/cp-gimplify.c
View File

@ -2358,30 +2358,26 @@ cp_fold (tree x)
{
unsigned i;
constructor_elt *p;
bool changed = false;
vec<constructor_elt, va_gc> *elts = CONSTRUCTOR_ELTS (x);
vec<constructor_elt, va_gc> *nelts = NULL;
vec_safe_reserve (nelts, vec_safe_length (elts));
FOR_EACH_VEC_SAFE_ELT (elts, i, p)
{
tree op = cp_fold (p->value);
constructor_elt e = { p->index, op };
nelts->quick_push (e);
if (op != p->value)
{
if (op == error_mark_node)
{
x = error_mark_node;
changed = false;
vec_free (nelts);
break;
}
changed = true;
if (nelts == NULL)
nelts = elts->copy ();
(*nelts)[i].value = op;
}
}
if (changed)
if (nelts)
x = build_constructor (TREE_TYPE (x), nelts);
else
vec_free (nelts);
break;
}
case TREE_VEC: