archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-23 04:24:49 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

7044738: Loop unroll optimization causes incorrect result

Browse source 
Take into account memory dependencies when clonning nodes in clone_up_backedge_goo().

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2011-06-28 15:24:29 -07:00
parent 565f8579ac
commit b3505a88a4
7 changed files with 211 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

10
hotspot/src/share/vm/opto/macro.cpp
View file

@ -391,13 +391,9 @@ Node *PhaseMacroExpand::value_from_mem_phi(Node *mem, BasicType ft, const Type *
}
}
// Check if an appropriate new value phi already exists.
Node* new_phi = NULL;
uint size = value_phis->size();
for (uint i=0; i < size; i++) {
if ( mem->_idx == value_phis->index_at(i) ) {
return value_phis->node_at(i);
}
}
Node* new_phi = value_phis->find(mem->_idx);
if (new_phi != NULL)
return new_phi;
if (level <= 0) {
return NULL; // Give up: phi tree too deep