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8141132: JEP 254: Compact Strings

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Adopt a more space-efficient internal representation for strings.

Co-authored-by: Brent Christian <brent.christian@oracle.com>
Co-authored-by: Vivek Deshpande <vivek.r.deshpande@intel.com>
Co-authored-by: Charlie Hunt <charlie.hunt@oracle.com>
Co-authored-by: Vladimir Kozlov <vladimir.kozlov@oracle.com>
Co-authored-by: Roger Riggs <roger.riggs@oracle.com>
Co-authored-by: Xueming Shen <xueming.shen@oracle.com>
Co-authored-by: Aleksey Shipilev <aleksey.shipilev@oracle.com>
Co-authored-by: Sandhya Viswanathan <sandhya.viswanathan@intel.com>
Reviewed-by: alanb, bdelsart, coleenp, iklam, jiangli, jrose, kevinw, naoto, pliden, roland, smarks, twisti
This commit is contained in:
Tobias Hartmann 2015-11-03 09:41:03 +01:00
parent 4e24e2cc6c
commit 7af927f9c1
74 changed files with 4838 additions and 1683 deletions
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47
hotspot/src/share/vm/classfile/vmSymbols.cpp
View file

@ -425,10 +425,26 @@ bool vmIntrinsics::is_disabled_by_flags(methodHandle method) {
// the following switch statement.
if (!InlineNatives) {
switch (id) {
case vmIntrinsics::_indexOf:
case vmIntrinsics::_compareTo:
case vmIntrinsics::_equals:
case vmIntrinsics::_indexOfL:
case vmIntrinsics::_indexOfU:
case vmIntrinsics::_indexOfUL:
case vmIntrinsics::_indexOfIL:
case vmIntrinsics::_indexOfIU:
case vmIntrinsics::_indexOfIUL:
case vmIntrinsics::_indexOfU_char:
case vmIntrinsics::_compareToL:
case vmIntrinsics::_compareToU:
case vmIntrinsics::_compareToLU:
case vmIntrinsics::_compareToUL:
case vmIntrinsics::_equalsL:
case vmIntrinsics::_equalsU:
case vmIntrinsics::_equalsC:
case vmIntrinsics::_getCharStringU:
case vmIntrinsics::_putCharStringU:
case vmIntrinsics::_compressStringC:
case vmIntrinsics::_compressStringB:
case vmIntrinsics::_inflateStringC:
case vmIntrinsics::_inflateStringB:
case vmIntrinsics::_getAndAddInt:
case vmIntrinsics::_getAndAddLong:
case vmIntrinsics::_getAndSetInt:
@ -437,6 +453,7 @@ bool vmIntrinsics::is_disabled_by_flags(methodHandle method) {
case vmIntrinsics::_loadFence:
case vmIntrinsics::_storeFence:
case vmIntrinsics::_fullFence:
case vmIntrinsics::_hasNegatives:
case vmIntrinsics::_Reference_get:
break;
default:
@ -619,19 +636,31 @@ bool vmIntrinsics::is_disabled_by_flags(methodHandle method) {
// intrinsic mechanism.
if (!InlineObjectCopy || !InlineArrayCopy) return true;
break;
case vmIntrinsics::_compareTo:
case vmIntrinsics::_compareToL:
case vmIntrinsics::_compareToU:
case vmIntrinsics::_compareToLU:
case vmIntrinsics::_compareToUL:
if (!SpecialStringCompareTo) return true;
break;
case vmIntrinsics::_indexOf:
case vmIntrinsics::_indexOfL:
case vmIntrinsics::_indexOfU:
case vmIntrinsics::_indexOfUL:
case vmIntrinsics::_indexOfIL:
case vmIntrinsics::_indexOfIU:
case vmIntrinsics::_indexOfIUL:
case vmIntrinsics::_indexOfU_char:
if (!SpecialStringIndexOf) return true;
break;
case vmIntrinsics::_equals:
case vmIntrinsics::_equalsL:
case vmIntrinsics::_equalsU:
if (!SpecialStringEquals) return true;
break;
case vmIntrinsics::_equalsB:
case vmIntrinsics::_equalsC:
if (!SpecialArraysEquals) return true;
break;
case vmIntrinsics::_encodeISOArray:
case vmIntrinsics::_encodeByteISOArray:
if (!SpecialEncodeISOArray) return true;
break;
case vmIntrinsics::_getCallerClass:
@ -666,6 +695,12 @@ bool vmIntrinsics::is_disabled_by_flags(methodHandle method) {
case vmIntrinsics::_subtractExactL:
if (!UseMathExactIntrinsics || !InlineMathNatives) return true;
break;
case vmIntrinsics::_getCharStringU:
case vmIntrinsics::_putCharStringU:
// Until JDK-8138651 is fixed, we have to rely on a special flag to
// disable these intrinsics for experiments.
if (!StringCharIntrinsics) return true;
break;
#endif // COMPILER2
default:
return false;