Re: SSA-form and cmove (Krishnan)
2 Sep 2000 16:20:53 -0400

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From: (Krishnan)
Newsgroups: comp.compilers
Date: 2 Sep 2000 16:20:53 -0400
Organization: University of Maryland, College Park
References: 00-08-066 00-08-099
Keywords: analysis

>Conditional move is a special case of predicated instruction. For
>ISAs that have general predication (i.e. conditional execution of any
>instruction), the problem must exist on every instruction. Are there
>compilers that use SSA and support general predication in the same
>representation? What do the IA-64 compilers do?

I don't know how IA-64 compilers handle it; you may want to take a look at
the following PACT'99 paper:

Lori Carter, Beth Simon, Brad Calder, Larry Carter, and Jeanne Ferrante,
Predicated Static Single Assignment . In proceedings of the International
Conference on Parallel Architectures and Compilation Techniques, October 1999.


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