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7079329: Adjust allocation prefetching for T4

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On T4 2 BIS instructions should be issued to prefetch 64 bytes

Reviewed-by: iveresov, phh, twisti
This commit is contained in:
Vladimir Kozlov 2011-08-16 16:59:46 -07:00
parent 080f790edc
commit 90651b2666
18 changed files with 299 additions and 129 deletions
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4
hotspot/src/share/vm/adlc/formssel.cpp
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@ -3390,7 +3390,9 @@ int MatchNode::needs_ideal_memory_edge(FormDict &globals) const {
"ClearArray"
};
int cnt = sizeof(needs_ideal_memory_list)/sizeof(char*);
if( strcmp(_opType,"PrefetchRead")==0 || strcmp(_opType,"PrefetchWrite")==0 )
if( strcmp(_opType,"PrefetchRead")==0 ||
strcmp(_opType,"PrefetchWrite")==0 ||
strcmp(_opType,"PrefetchAllocation")==0 )
return 1;
if( _lChild ) {
const char *opType = _lChild->_opType;