archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-22 03:54:33 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

6889300: assert(i != k || is_new || i->outcnt() > 0, "don't return dead nodes")

Browse source 
PhiNode::Ideal() should return TOP for Phi node with no users.

Reviewed-by: never, jrose
This commit is contained in:
Vladimir Kozlov 2009-10-13 22:32:31 -07:00
parent 9a22acef05
commit 998bcbaf4b
2 changed files with 12 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

4
hotspot/src/share/vm/opto/ifnode.cpp
View file

@ -240,13 +240,13 @@ static Node* split_if(IfNode *iff, PhaseIterGVN *igvn) {
// as a single huge transform.
igvn->register_new_node_with_optimizer( region_c );
igvn->register_new_node_with_optimizer( region_x );
phi_x = phase->transform( phi_x );
// Prevent the untimely death of phi_x. Currently he has no uses. He is
// about to get one. If this only use goes away, then phi_x will look dead.
// However, he will be picking up some more uses down below.
Node *hook = new (igvn->C, 4) Node(4);
hook->init_req(0, phi_x);
hook->init_req(1, phi_c);
phi_x = phase->transform( phi_x );
// Make the compare
Node *cmp_c = phase->makecon(t);
@ -322,6 +322,7 @@ static Node* split_if(IfNode *iff, PhaseIterGVN *igvn) {
phi_s = PhiNode::make_blank(region_s,phi);
phi_s->init_req( 1, phi_c );
phi_s->init_req( 2, phi_x );
hook->add_req(phi_s);
phi_s = phase->transform(phi_s);
}
proj_path_data = phi_s;
@ -333,6 +334,7 @@ static Node* split_if(IfNode *iff, PhaseIterGVN *igvn) {
phi_f = PhiNode::make_blank(region_f,phi);
phi_f->init_req( 1, phi_c );
phi_f->init_req( 2, phi_x );
hook->add_req(phi_f);
phi_f = phase->transform(phi_f);
}
proj_path_data = phi_f;