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Sorry the 1st example I gave it bit lame, it is changed to following: // a[] is local array, no addr taken. die right after the loop for (i = 0; i < N; i++) { a[i] = ... /* s1 */ sum += a[i-1]; } S1 could be easily deleted if alias analyizer say a[i] and a[i-1]. On 11/8/12 6:07 PM, Shuxin Yang wrote: > Hi, > > In today meeting, Dan gave a very

Hi, In today meeting, Dan gave a very impressive talk about alias analysis. I had a question about the example in his slide, something like: for (i = 0; i < N; i++) a[i] = a[i-1] + 1; For the sake of convenience, let A1, A2 be a[i] and a[i-1] respectively. In Dan's design, Alias(A1, A2) would give "no alias", and in order to prevent A2 from being mistakenly moved out

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