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The following patch is the first step to implement the loop version in cfg-layout mode. This is required to move SMS to work in cfg-layout mode. It's the first patch of several that improve SMS and make it applicable to more loops.
Since the patch has wide changes and moves functions between several files I will wait for your comment before committing it.
The patch passed bootstrap with -funswitch-loops and didn't produce any new regressions on apple-ppc-darwin target.
Looks good to me. One minor nit - couple of new function needs comments describing functionality and parameters.
- Devang
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