Name Strings

SPV_EXT_optnone

Contact

To report problems with this extension, please open a new issue at:

https://github.com/KhronosGroup/SPIRV-Headers

Contributors

  • Mariya Podchishchaeva, Intel

  • Ben Ashbaugh, Intel

  • Alexey Sotkin, Intel

  • Joe Garvey, Intel

  • Dmitry Sidorov, Intel

Notice

Copyright (c) 2024 The Khronos Group Inc. Copyright terms at http://www.khronos.org/registry/speccopyright.html

Status

  • Complete

Version

Last Modified Date

2024-06-21

Revision

2

Dependencies

This extension is written against the SPIR-V Specification, Version 1.6 Revision 3, Unified

This extension requires SPIR-V 1.0.

Overview

This extension adds new possible value for Function Control mask - OptNoneEXT, which represents a strong request to not optimize the function. It is useful in cases where the user wants to debug a particular function without sacrificing performance of the entire application, and this is accomplished by disabling optimizations solely for that particular function instead of the entire module.

Extension Name

To use this extension within a SPIR-V module, the following OpExtension must be present in the module:

OpExtension "SPV_EXT_optnone"

Modifications to the SPIR-V Specification, Version 1.6, Revision 3, Unified

Capabilities

Modify Section 3.31, "Capability", adding these rows to the Capability table:

Capability Implicitly Declares

6094

OptNoneEXT
Allow to use OptNoneEXT Function Control mask value

Function Control

In section 3.24 "Function Control" add the following row to the Function Control table:

Function Control Enabling Capabilities

0x10000

OptNoneEXT
Strong request, to the extent possible, to not optimize the function. Only functions with Inline Function Control mask can be considered to be inlined into the function.
This function should never be inlined.
It must not be used together with Inline bit.

OptNoneEXT

Issues

Discussion:

…​

Revision History

Rev Date Author Changes

1

2020-12-15

Mariya Podchishchaeva

Initial revision

2

2024-06-21

Dmitry Sidorov

Prepare for publication