Majumdar, Sutanu Majumdar, Sutanu

Compiler Back End Panel

Robert Geva Intel Compiler Lab

Back End Compiler PanelBack End Compiler Panel1) Are compiler code generation techniques going to transition along with the hardware transition from multi-core to many-core and hybrid systems and at what speed?

2) What information do you need from a Compiler Intermediate Format to efficiently utilize multi-core, many-core and hybrid systems that is not available from traditional languages like C, C++, or F90? Are you looking at directive-based or library-based approaches or is there another approach that you like?

3) Is embedded global memory addressing (like Co-Array Fortran) to be widely available and supported even on distributed memory systems?

4) What kind of hybrid systems or processor extensions are going to be supported by your compiler's code generation suite?

5) What new run-time libraries will be available to utilize multi-core, many-core, and hybrid systems and will they work seamlessly through dynamic linking?

1) Are compiler code generation techniques going to transition along with the hardware transition from multi-core to many-core and hybrid systems and at what speed?

2) What information do you need from a Compiler Intermediate Format to efficiently utilize multi-core, many-core and hybrid systems that is not available from traditional languages like C, C++, or F90? Are you looking at directive-based or library-based approaches or is there another approach that you like?

3) Is embedded global memory addressing (like Co-Array Fortran) to be widely available and supported even on distributed memory systems?

4) What kind of hybrid systems or processor extensions are going to be supported by your compiler's code generation suite?

5) What new run-time libraries will be available to utilize multi-core, many-core, and hybrid systems and will they work seamlessly through dynamic linking?

Copyright © 2006, Intel Corporation. All rights reserved. *Other brands and names are the property of their respective owners

Software and Solutions Group

Are compiler code generation techniques going to transition along with the hardware transition from multi-core to many-core and hybrid systems and at what speed?

04/19/20233

JIT compilingCt: Research technology fora data parallel language

Forward scaling to future architectures

Save costly memory copyingby delayed code generation

Multipletargets

Validation

Copyright © 2006, Intel Corporation. All rights reserved. *Other brands and names are the property of their respective owners

Software and Solutions Group

Are you looking at directive-based or library-based approaches or is there another approach that you like

04/19/20234

Here’s my code

Is “limit” loop invariant?

Needs

more work

Interactive Compiler technology to Guide the programmer to write serial codewith directives and restructuring, leading to automatic parallelism

Copyright © 2006, Intel Corporation. All rights reserved. *Other brands and names are the property of their respective owners

Software and Solutions Group

Is embedded global memory addressing (like Co-Array Fortran) to be widely available and supported even on distributed memory systems?

04/19/20235

•Minimize changes to programming practices •Use familiar concepts, existing programming languages, integrate into advanced platform technologies

Goals

•Data parallel language: Start programming from data parallelism perspective, use array notations. Tool chain will transform and target a CPU and Larrabee combination•Offload language: Start with task parallelism, and use directives to offload computation

Solutions

Copyright © 2006, Intel Corporation. All rights reserved. *Other brands and names are the property of their respective owners

Software and Solutions Group

What kind of hybrid systems or processor extensions are going to be supported by your compiler's code generation suite?

04/19/20236

LRB new instructions512 widthMasked operations Broadcasts, swizzles

Existing SIMDSSE, SSE2, SSE3, SSE4

Advanced Vector eXtensions256 width3 operand, non destructiveEnhanced data re-arrangement

Copyright © 2006, Intel Corporation. All rights reserved. *Other brands and names are the property of their respective owners

Software and Solutions Group

What new run-time libraries will be available to utilize multi-core, many-core, and hybrid systems and will they work seamlessly through dynamic linking?

Resource coordination and task scheduling

http://channel9.msdn.com/pdc2008/TL22/

Generic algorithms, equivalent to language extensions

Domain specific libraries

Including math libraries

New domains, natural language processing, gesture recognition

DLL hell? No good news

04/19/20237