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6921992: failure in verify scheduling after 6792161

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Reviewed-by: kvn
This commit is contained in:
Tom Rodriguez 2010-02-04 11:16:23 -08:00
parent 82ce2c602b
commit 22ce62f2d1
1 changed files with 1 additions and 22 deletions
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23
hotspot/src/share/vm/opto/ifg.cpp
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@ -736,28 +736,7 @@ uint PhaseChaitin::build_ifg_physical( ResourceArea *a ) {
// the flags and assumes it's dead. This keeps the (useless)
// flag-setting behavior alive while also keeping the (useful)
// memory update effect.
uint begin = 1;
uint end = n->req();
if (n->Opcode() == Op_SCMemProj) {
begin = 0;
} else if (n->is_Mach()) {
switch (n->as_Mach()->ideal_Opcode()) {
case Op_MemBarAcquire:
case Op_MemBarVolatile:
if (n->len() >= MemBarNode::Precedent + 1 &&
n->in(MemBarNode::Precedent) != NULL &&
n->in(MemBarNode::Precedent)->outcnt() == 1) {
// This membar node is the single user of it's input
// so the input won't be considered live and this node
// would get deleted during copy elimination so force
// it to be live.
end = MemBarNode::Precedent + 1;
}
break;
}
}
for( uint k = begin; k < end; k++ ) {
for( uint k = ((n->Opcode() == Op_SCMemProj) ? 0:1); k < n->req(); k++ ) {
Node *def = n->in(k);
uint x = n2lidx(def);
if( !x ) continue;