--- a/hotspot/src/share/vm/opto/macro.cpp Thu Feb 05 13:38:52 2009 -0800
+++ b/hotspot/src/share/vm/opto/macro.cpp Thu Feb 05 14:43:58 2009 -0800
@@ -952,13 +952,6 @@
Node* klass_node = alloc->in(AllocateNode::KlassNode);
Node* initial_slow_test = alloc->in(AllocateNode::InitialTest);
- // With escape analysis, the entire memory state was needed to be able to
- // eliminate the allocation. Since the allocations cannot be eliminated,
- // optimize it to the raw slice.
- if (mem->is_MergeMem()) {
- mem = mem->as_MergeMem()->memory_at(Compile::AliasIdxRaw);
- }
-
assert(ctrl != NULL, "must have control");
// We need a Region and corresponding Phi's to merge the slow-path and fast-path results.
// they will not be used if "always_slow" is set
@@ -1016,6 +1009,11 @@
Node *slow_mem = mem; // save the current memory state for slow path
// generate the fast allocation code unless we know that the initial test will always go slow
if (!always_slow) {
+ // Fast path modifies only raw memory.
+ if (mem->is_MergeMem()) {
+ mem = mem->as_MergeMem()->memory_at(Compile::AliasIdxRaw);
+ }
+
Node* eden_top_adr;
Node* eden_end_adr;
@@ -1239,8 +1237,6 @@
}
}
- mem = result_phi_rawmem;
-
// An allocate node has separate i_o projections for the uses on the control and i_o paths
// Replace uses of the control i_o projection with result_phi_i_o (unless we are only generating a slow call)
if (_ioproj_fallthrough == NULL) {