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7059037: Use BIS for zeroing on T4

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Use BIS for zeroing new allocated big (2Kb and more) objects and arrays.

Reviewed-by: never, twisti, ysr
This commit is contained in:
Vladimir Kozlov 2011-08-26 08:52:22 -07:00
parent 19f7fb98b8
commit 6446205688
14 changed files with 232 additions and 35 deletions
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4
hotspot/src/share/vm/runtime/stubRoutines.hpp
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@ -199,6 +199,9 @@ class StubRoutines: AllStatic {
static address _arrayof_jshort_fill;
static address _arrayof_jint_fill;
// zero heap space aligned to jlong (8 bytes)
static address _zero_aligned_words;
// These are versions of the java.lang.Math methods which perform
// the same operations as the intrinsic version. They are used for
// constant folding in the compiler to ensure equivalence. If the
@ -332,6 +335,7 @@ class StubRoutines: AllStatic {
static address select_fill_function(BasicType t, bool aligned, const char* &name);
static address zero_aligned_words() { return _zero_aligned_words; }
static double intrinsic_log(double d) {
assert(_intrinsic_log != NULL, "must be defined");