Skip to content

8386889: [lworld] Redundant StoreStore membar after FlatValuePayload::read #2581

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
jsikstro wants to merge 2 commits into from
+2 −12
Closed

8386889: [lworld] Redundant StoreStore membar after FlatValuePayload::read #2581

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
667796c
8386889: [lworld] Redundant StoreStore membar after FlatValuePayload:…
jsikstro Jun 25, 2026
0186aa7
Add twi_0 + isync after read_flat_field in templateTable_ppc_64.cpp
jsikstro Jun 25, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 0 additions & 4 deletions src/hotspot/cpu/aarch64/c1_Runtime1_aarch64.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -870,10 +870,6 @@ OopMapSet* Runtime1::generate_code_for(StubId id, StubAssembler* sasm) {
f.load_argument(0, r1); // r1,: index
int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, load_flat_array), r0, r1);

// Ensure the stores that initialize the buffer are visible
// before any subsequent store that publishes this reference.
__ membar(Assembler::StoreStore);

oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, map);
restore_live_registers_except_r0(sasm);
Expand Down
1 change: 0 additions & 1 deletion src/hotspot/cpu/aarch64/interp_masm_aarch64.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -212,7 +212,6 @@ void InterpreterMacroAssembler::get_method_counters(Register method,

void InterpreterMacroAssembler::read_flat_field(Register entry, Register obj) {
call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flat_field), obj, entry);
membar(Assembler::StoreStore);
}

void InterpreterMacroAssembler::write_flat_field(Register entry, Register field_offset,
Expand Down
1 change: 0 additions & 1 deletion src/hotspot/cpu/ppc/interp_masm_ppc_64.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2432,7 +2432,6 @@ void InterpreterMacroAssembler::notify_method_exit(bool is_native_method, TosSta

void InterpreterMacroAssembler::read_flat_field(Register entry, Register obj) {
call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flat_field), obj, entry);
membar(Assembler::StoreStore | Assembler::LoadLoad); // for allocation and volatile load
}

void InterpreterMacroAssembler::write_flat_field(Register entry, Register tmp1, Register tmp2,
Expand Down
1 change: 0 additions & 1 deletion src/hotspot/cpu/ppc/templateTable_ppc_64.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3417,7 +3417,6 @@ void TemplateTable::fast_accessfield(TosState state) {
if (support_IRIW_for_not_multiple_copy_atomic_cpu) { __ fence(); }
__ read_flat_field(Rcache, R17_tos);
__ verify_oop(R17_tos);
// memory barrier in read_flat_field
Comment thread
jsikstro marked this conversation as resolved.
break;
}
case Bytecodes::_fast_agetfield:
Expand Down
4 changes: 0 additions & 4 deletions src/hotspot/cpu/riscv/c1_Runtime1_riscv.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -871,10 +871,6 @@ OopMapSet* Runtime1::generate_code_for(StubId id, StubAssembler* sasm) {
f.load_argument(0, x11); // x11,: index
int call_offset = __ call_RT(x10, noreg, CAST_FROM_FN_PTR(address, load_flat_array), x10, x11);

// Ensure the stores that initialize the buffer are visible
// before many subsequent store that publishes this reference.
__ membar(MacroAssembler::StoreStore);

oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, map);
restore_live_registers_except_r10(sasm);
Expand Down
1 change: 0 additions & 1 deletion src/hotspot/cpu/riscv/interp_masm_riscv.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1868,7 +1868,6 @@ void InterpreterMacroAssembler::get_method_counters(Register method,

void InterpreterMacroAssembler::read_flat_field(Register entry, Register obj) {
call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flat_field), obj, entry);
membar(MacroAssembler::StoreStore);
}

void InterpreterMacroAssembler::write_flat_field(Register entry, Register field_offset,
Expand Down