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6700100: optimize inline_native_clone() for small objects with exact klass

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Optimize small instance clones as loads/stores

Reviewed-by: kvn, iveresov
This commit is contained in:
Roland Westrelin 2014-12-16 13:49:36 +01:00
parent 186ca57447
commit 2e82794bfa
11 changed files with 671 additions and 30 deletions
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7
hotspot/src/share/vm/opto/macroArrayCopy.cpp
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@ -519,7 +519,8 @@ Node* PhaseMacroExpand::generate_arraycopy(ArrayCopyNode *ac, AllocateArrayNode*
// Test S[] against D[], not S against D, because (probably)
// the secondary supertype cache is less busy for S[] than S.
// This usually only matters when D is an interface.
Node* not_subtype_ctrl = ac->is_arraycopy_notest() ? top() : Phase::gen_subtype_check(src_klass, dest_klass, ctrl, mem, &_igvn);
Node* not_subtype_ctrl = ac->is_arraycopy_validated() ? top() :
Phase::gen_subtype_check(src_klass, dest_klass, ctrl, mem, &_igvn);
// Plug failing path into checked_oop_disjoint_arraycopy
if (not_subtype_ctrl != top()) {
Node* local_ctrl = not_subtype_ctrl;
@ -1109,7 +1110,7 @@ void PhaseMacroExpand::expand_arraycopy_node(ArrayCopyNode *ac) {
assert(alloc != NULL, "expect alloc");
}
assert(ac->is_arraycopy() || ac->is_arraycopy_notest(), "should be an arraycopy");
assert(ac->is_arraycopy() || ac->is_arraycopy_validated(), "should be an arraycopy");
// Compile time checks. If any of these checks cannot be verified at compile time,
// we do not make a fast path for this call. Instead, we let the call remain as it
@ -1191,7 +1192,7 @@ void PhaseMacroExpand::expand_arraycopy_node(ArrayCopyNode *ac) {
RegionNode* slow_region = new RegionNode(1);
transform_later(slow_region);
if (!ac->is_arraycopy_notest()) {
if (!ac->is_arraycopy_validated()) {
// (3) operands must not be null
// We currently perform our null checks with the null_check routine.
// This means that the null exceptions will be reported in the caller