Bug ID: JDK-8274569 X86 backend related incorrectness issues in legacy store mask patterns

JDK-8274569 : X86 backend related incorrectness issues in legacy store mask patterns

Type: Bug
Component: hotspot
Sub-Component: compiler
Affected Version: repo-panama

Priority: P4
Status: Resolved
Resolution: Fixed
CPU: x86_64

Submitted: 2021-09-30
Updated: 2021-10-04
Resolved: 2021-10-04

Versions (Unresolved/Resolved/Fixed)

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Other
repo-panamaFixed

Related Reports

Duplicate :	JDK-8274533 - [Vector API] Incorrect computation by VectorMask.toLong operation after JDK-8273949
Relates :	JDK-8262356 - Optimize existing masked operation support for AVX-512.

Description

- Issue was seen while unit testing changes for masking related optimizations on vectorIntrinsics branch.
- Following patterns emit incorrect instruction sequence.
  - instruct storeMask2B
  - instruct storeMask4B
  - instruct storeMask8B
  - instruct storeMask8B_avx
  - instruct ReplI_M1