[patch] RBO preview

[Jules Bergmann]

This patch
  - adds RBO support,
  - applies it to by-value FFT and FFTM,
  - adds a simple RBO evaluator for expressions like 'A = fft(B)'
    which avoids the temporary and copy,
  - adds fastconv RBO evaluators for the general case using Fftm
    underneath, and the special case when using Cbe Fastconv underneath.
  - adds single-line fastconv case to the fastconv benchmark

This patch is fairly close to ready.  However there are a few bits missing:
  - add distributed support for Return_expr_blocks
  - validation (this does work for the fastconv benchmark)

Comments?

				-- Jules

-- 
Jules Bergmann
CodeSourcery
jules at codesourcery.com
(650) 331-3385 x705
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