Loading...

XML

Word

Printable

Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 12
Affects Version/s: 8-aarch64, 11, 12
Component/s: hotspot
Labels:

Subcomponent:
compiler
Resolved In Build:
b09

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8243344	11.0.8-oracle	Roland Westrelin	P4	Resolved	Fixed	b04
JDK-8230198	11.0.5	Roland Westrelin	P4	Resolved	Fixed	b05
JDK-8260820	openjdk8u292	Andrew Hughes	P4	Resolved	Fixed	b01
JDK-8261726	8u301	Fairoz Matte	P4	Resolved	Fixed	b01

Aarch64 emits a single instruction for volatile accesses that include the required memory barriers. For this to work properly the aarch64 backend has to locate membars that go with a memory access to elide them. This is currently implemented with some complicated pattern matching that has proven fragile and painful to maintain. This change introduces a new and robust logic to locate membars and memory accesses for volatile accesses.

backported by

JDK-8230198 Track membars for volatile accesses so they can be properly optimized

Resolved

JDK-8243344 Track membars for volatile accesses so they can be properly optimized

Resolved

JDK-8260820 Track membars for volatile accesses so they can be properly optimized

Resolved

JDK-8261726 Track membars for volatile accesses so they can be properly optimized

Resolved

blocks

JDK-8210389 C2: assert(n->outcnt() != 0 || C->top() == n || n->is_Proj()) failed: No dead instructions after post-alloc

Resolved

relates to

JDK-8211233 MemBarNode::trailing_membar() and MemBarNode::leading_membar() need to handle dying subgraphs better

Resolved

JDK-8214857 "bad trailing membar" assert failure at memnode.cpp:3220

Resolved

JDK-8257192 Integrate AArch64 JIT port into 8u

Resolved

(3 relates to)

Assignee:: Roland Westrelin

Reporter:: Roland Westrelin

Votes:: 0 Vote for this issue

Watchers:: 7 Start watching this issue

Created:: 2018-08-13 05:28

Updated:: 2021-06-11 14:24

Resolved:: 2018-08-22 01:03

Details

Backports

Description

Attachments

Issue Links

Activity

People

Dates