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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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6
hotspot/src/share/vm/runtime/globals.hpp
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@ -2889,6 +2889,9 @@ public:
product(bool, AggressiveOpts, false, \
"Enable aggressive optimizations - see arguments.cpp") \
\
product_pd(bool, CompactStrings, \
"Enable Strings to use single byte chars in backing store") \
\
product_pd(uintx, TypeProfileLevel, \
"=XYZ, with Z: Type profiling of arguments at call; " \
"Y: Type profiling of return value at call; " \
@ -4259,6 +4262,9 @@ public:
"Use the FP register for holding the frame pointer " \
"and not as a general purpose register.") \
\
diagnostic(bool, StringCharIntrinsics, true, \
"Inline String*.getChar/putChar intrinsics.") \
\
diagnostic(bool, CheckIntrinsics, true, \
"When a class C is loaded, check that " \
"(1) all intrinsics defined by the VM for class C are present "\