--- a/hotspot/src/share/vm/opto/postaloc.cpp Tue Mar 18 23:54:17 2008 -0700
+++ b/hotspot/src/share/vm/opto/postaloc.cpp Wed Mar 19 15:14:36 2008 -0700
@@ -253,7 +253,8 @@
// nodes can represent the same constant so the type and rule of the
// MachNode must be checked to ensure equivalence.
//
-bool PhaseChaitin::eliminate_copy_of_constant(Node* val, Block *current_block,
+bool PhaseChaitin::eliminate_copy_of_constant(Node* val, Node* n,
+ Block *current_block,
Node_List& value, Node_List& regnd,
OptoReg::Name nreg, OptoReg::Name nreg2) {
if (value[nreg] != val && val->is_Con() &&
@@ -269,12 +270,12 @@
// Since they are equivalent the second one if redundant and can
// be removed.
//
- // val will be replaced with the old value but val might have
+ // n will be replaced with the old value but n might have
// kills projections associated with it so remove them now so that
// yank_if_dead will be able to elminate the copy once the uses
// have been transferred to the old[value].
- for (DUIterator_Fast imax, i = val->fast_outs(imax); i < imax; i++) {
- Node* use = val->fast_out(i);
+ for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) {
+ Node* use = n->fast_out(i);
if (use->is_Proj() && use->outcnt() == 0) {
// Kill projections have no users and one input
use->set_req(0, C->top());
@@ -521,7 +522,7 @@
// then 'n' is a useless copy. Do not update the register->node
// mapping so 'n' will go dead.
if( value[nreg] != val ) {
- if (eliminate_copy_of_constant(val, b, value, regnd, nreg, OptoReg::Bad)) {
+ if (eliminate_copy_of_constant(val, n, b, value, regnd, nreg, OptoReg::Bad)) {
n->replace_by(regnd[nreg]);
j -= yank_if_dead(n,b,&value,®nd);
} else {
@@ -549,7 +550,7 @@
nreg_lo = tmp.find_first_elem();
}
if( value[nreg] != val || value[nreg_lo] != val ) {
- if (eliminate_copy_of_constant(n, b, value, regnd, nreg, nreg_lo)) {
+ if (eliminate_copy_of_constant(val, n, b, value, regnd, nreg, nreg_lo)) {
n->replace_by(regnd[nreg]);
j -= yank_if_dead(n,b,&value,®nd);
} else {