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I've got an example where I think that there should be some loop-invariant optimization happening, but it's not. Here's the C code: #define DIM 8 #define UNROLL_DIM DIM typedef double InArray[DIM][DIM]; __declspec(noalias) void f1( InArray c, const InArray a, const InArray b ) { #pragma clang loop unroll_count(UNROLL_DIM) for( int i=0;i<DIM;i++) #pragma clang loop

I was looking at the code generated from the following c code and noticed extra loads in the inner-loop of these nested for-loops: #define DIM 8 #define UNROLL_DIM DIM typedef double InArray[DIM][DIM]; void f1( InArray c, InArray a, InArray b ) { #pragma clang loop unroll_count(UNROLL_DIM) for( int i=0;i<DIM;i++) #pragma clang loop unroll_count(UNROLL_DIM) for( int

I tried changing 'noalias' to 'restrict' in the code and I get: fma.c:17:12: warning: 'restrict' attribute only applies to return values that are pointers It seems like 'noalias' would be the correct attribute here, from the article you linked: "if a function is annotated as noalias, the optimizer can assume that, in addition to the parameters themselves,

...x. :2.7690 Max. :27.000 (Other):300 V10 Min. : 6.00 1st Qu.:10.00 Median :14.00 Mean :18.03 3rd Qu.:24.00 Max. :52.00 Now I want to get a summary statistics of the summaries. Obviously I would need to store the summary results inarrays. But I was wondering if that makes sense and how an expert would solve this? I don't want to create an array for each column if possible. Thanks for the kind support, Bernd [[alternative HTML version deleted]]

This code lets you use standard CSS selectors to get an array of elements. For example, $$("#container div.myElements") would return all subelements of #container that are divs and are of the class myElements. I submitted similar code a while back to the email address for the prototype library but never got a reply. Thought I''d post this in the hopes that some others will find