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7081933: Use zeroing elimination optimization for large array

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Don't zero new typeArray during runtime call if the allocation is followed by arraycopy into it.

Reviewed-by: twisti
This commit is contained in:
Vladimir Kozlov 2011-09-26 10:24:05 -07:00
parent 95c56a472b
commit 47e357e16f
13 changed files with 97 additions and 11 deletions
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hotspot/src/share/vm/gc_interface/collectedHeap.hpp
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@ -322,6 +322,7 @@ class CollectedHeap : public CHeapObj {
// General obj/array allocation facilities.
inline static oop obj_allocate(KlassHandle klass, int size, TRAPS);
inline static oop array_allocate(KlassHandle klass, int size, int length, TRAPS);
inline static oop array_allocate_nozero(KlassHandle klass, int size, int length, TRAPS);
// Special obj/array allocation facilities.
// Some heaps may want to manage "permanent" data uniquely. These default