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Hi all, I just noticed that LICM does not hoist/sink the following store out of the loop: int array[20]; int i; for (i = 0; i<100; i++) { array [0] = 0; } The getElementPtr instruction is hoisted out of the loop; the store is not. Did I miss something obvious? Bitcode file attached. Generated using LLVM 2.5 and llvm-gcc -c -emit-llvm

2009/10/27 Marc Brünink <marc at bruenink.de> > Hi all, > > I just noticed that LICM does not hoist/sink the following store out of the > loop: > > int array[20]; > int i; > for (i = 0; i<100; i++) { > array [0] = 0; > } > > The getElementPtr instruction is hoisted out of the loop; the store is not. > Did I

...; to the cc list there. This is expected behavior, you need to run loop rotate before licm to get this. This is completely eliminate at -O3. -Chris -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20091027/3000fb8d/attachment.html>