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8143608: Don't 64-bit align start of InstanceKlass vtable, itable, and nonstatic_oopmap on 32-bit systems

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Removed alignment of these fields.

Reviewed-by: coleenp, dholmes, mgerdin
This commit is contained in:
Chris Plummer 2016-01-20 11:58:09 -08:00
parent a58cdadbf2
commit a73f6dc940
8 changed files with 18 additions and 52 deletions
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12
hotspot/src/cpu/sparc/vm/macroAssembler_sparc.cpp
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@ -2196,22 +2196,10 @@ void MacroAssembler::lookup_interface_method(Register recv_klass,
// %%% We should store the aligned, prescaled offset in the klassoop.
// Then the next several instructions would fold away.
int round_to_unit = ((HeapWordsPerLong > 1) ? BytesPerLong : 0);
int itb_offset = vtable_base;
if (round_to_unit != 0) {
// hoist first instruction of round_to(scan_temp, BytesPerLong):
itb_offset += round_to_unit - wordSize;
}
int itb_scale = exact_log2(vtableEntry::size() * wordSize);
sll(scan_temp, itb_scale, scan_temp);
add(scan_temp, itb_offset, scan_temp);
if (round_to_unit != 0) {
// Round up to align_object_offset boundary
// see code for InstanceKlass::start_of_itable!
// Was: round_to(scan_temp, BytesPerLong);
// Hoisted: add(scan_temp, BytesPerLong-1, scan_temp);
and3(scan_temp, -round_to_unit, scan_temp);
}
add(recv_klass, scan_temp, scan_temp);
// Adjust recv_klass by scaled itable_index, so we can free itable_index.