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8271896: Remove unnecessary top address checks in BOT

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Reviewed-by: tschatzl, iwalulya
This commit is contained in:
Albert Mingkun Yang 2021-08-06 08:27:42 +00:00
parent e7b6f48182
commit c2b7facea4
3 changed files with 1 additions and 5 deletions
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1
src/hotspot/share/gc/g1/g1BlockOffsetTable.cpp
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@ -235,7 +235,6 @@ HeapWord* G1BlockOffsetTablePart::forward_to_block_containing_addr_slow(HeapWord
"next_boundary is beyond the end of the covered region "
" next_boundary " PTR_FORMAT " _array->_end " PTR_FORMAT,
p2i(next_boundary), p2i(_bot->_reserved.end()));
if (addr >= _hr->top()) return _hr->top();
while (next_boundary < addr) {
while (n <= next_boundary) {
q = n;

1
src/hotspot/share/gc/g1/g1BlockOffsetTable.inline.hpp
View File

@ -132,7 +132,6 @@ inline HeapWord* G1BlockOffsetTablePart::block_at_or_preceding(const void* addr)
inline HeapWord* G1BlockOffsetTablePart::forward_to_block_containing_addr_const(HeapWord* q, HeapWord* n,
const void* addr) const {
if (addr >= _hr->top()) return _hr->top();
while (n <= addr) {
q = n;
oop obj = cast_to_oop(q);

4
src/hotspot/share/gc/g1/heapRegion.inline.hpp
View File

@ -178,9 +178,7 @@ inline bool HeapRegion::is_obj_dead(const oop obj, const G1CMBitMap* const prev_
}
inline size_t HeapRegion::block_size(const HeapWord *addr) const {
if (addr == top()) {
return pointer_delta(end(), addr);
}
assert(addr < top(), "precondition");
if (block_is_obj(addr)) {
return cast_to_oop(addr)->size();