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Type: Enhancement
Resolution: Fixed
Priority: P3
Fix Version/s: 16
Affects Version/s: 16
Component/s: hotspot
Labels:
- c2-intrinsic
- c2compiler

Subcomponent:
compiler
Resolved In Build:
b11
CPU:

x86

- Currently rotate operation is inferred through pattern matching over a sequence of shift left/right followed by logic OR operation. Extend this approach to infer vector rotation operations.
- AVX512 added new vector rotate instructions VPRO[RL][V][QD] which can be exploited by either extending SLP or post SLP pattern matching.

causes

JDK-8353359 C2: Or(I|L)Node::Ideal is missing AddNode::Ideal call

Resolved

relates to

JDK-8332905 C2 SuperWord: bad AD file, with RotateRightV and first operand not a pack

Resolved

JDK-8252188 Crash in OrINode::Ideal(PhaseGVN*, bool)+0x8b9

Closed

JDK-8271589 Fatal error with variable shift count integer rotate operation.

Closed

JDK-8256823 C2 compilation fails with "assert(isShiftCount(imm8 >> 1)) failed: illegal shift count"

Closed

JDK-8257182 JCK test failures in integer / long rotation tests

Closed

JDK-8230525 Missing intrinsics for Integer and Long operations

Open

(2 relates to)

Assignee:: Jatin Bhateja
Reporter:: Jatin Bhateja
Votes:: 0 Vote for this issue
Watchers:: 8 Start watching this issue

Created:: 2020-07-05 21:59
Updated:: 2025-04-01 00:42
Resolved:: 2020-08-08 14:02

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