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ipa-inline.c (cgraph_estimate_growth): Discover self recursive functions.

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* ipa-inline.c (cgraph_estimate_growth): Discover self recursive
	functions.
	(cgraph_decide_inlining_of_small_function): Use edge->count to detect
	profile presence locally.

From-SVN: r139800
This commit is contained in:
Jan Hubicka 2008-08-30 11:46:19 +02:00 • committed by Jan Hubicka
parent 21bacb7e15
commit 76718c16d0
2 changed files with 28 additions and 9 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2008-08-30 Jan Hubicka <jh@suse.cz>
* ipa-inline.c (cgraph_estimate_growth): Discover self recursive
functions.
(cgraph_decide_inlining_of_small_function): Use edge->count to detect
profile presence locally.
2008-08-29 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/37086

30
gcc/ipa-inline.c
View file

@ -318,18 +318,25 @@ cgraph_estimate_growth (struct cgraph_node *node)
{
int growth = 0;
struct cgraph_edge *e;
bool self_recursive = false;
if (node->global.estimated_growth != INT_MIN)
return node->global.estimated_growth;
for (e = node->callers; e; e = e->next_caller)
if (e->inline_failed)
growth += (cgraph_estimate_size_after_inlining (1, e->caller, node)
- e->caller->global.insns);
{
if (e->caller == node)
self_recursive = true;
if (e->inline_failed)
growth += (cgraph_estimate_size_after_inlining (1, e->caller, node)
- e->caller->global.insns);
}
/* ??? Wrong for self recursive functions or cases where we decide to not
inline for different reasons, but it is not big deal as in that case
we will keep the body around, but we will also avoid some inlining. */
if (!node->needed && !DECL_EXTERNAL (node->decl))
/* ??? Wrong for non-trivially self recursive functions or cases where
we decide to not inline for different reasons, but it is not big deal
as in that case we will keep the body around, but we will also avoid
some inlining. */
if (!node->needed && !DECL_EXTERNAL (node->decl) && !self_recursive)
growth -= node->global.insns;
node->global.estimated_growth = growth;
@ -906,8 +913,13 @@ cgraph_decide_inlining_of_small_functions (void)
is not good idea so prohibit the recursive inlining.
??? When the frequencies are taken into account we might not need this
restriction. */
if (!max_count)
restriction.
We need to be cureful here, in some testcases, e.g. directivec.c in
libcpp, we can estimate self recursive function to have negative growth
for inlining completely.
*/
if (!edge->count)
{
where = edge->caller;
while (where->global.inlined_to)