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...etails, please take a look at >> >> http://wiki.open64.net/index.php/Zero_Delay_Loop >> >> Thanks >> Gang >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121123/d378019b/attachment.html>

Hi, Gang: I remember there were different voices when you check-in the code. I agree with them although I didn't reply your mail in open64's mailing list. In the transformation you illustrate, it involves two operations: 1) promote WHILE-loop into DO-loop (i.e noncountable loop to countable loop) 2) get rid of trip-count dec/inc and compare. 1) is irrelevant to HW loop.