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...s memory accesses. The WebCL kernel Validator will enforce out of bounds memory protections, and will perform syntactic validation of WebCL kernels. The WebCL Validator RFQ can be accessed from: http://www.khronos.org/files/webcl/Khronos_WebCL_Validator_RFQ.PDF Please send all queries to: Tasneem Brutch t.brutch at samsung.com<mailto:t.brutch at samsung.com> WebCL Working Group Chair -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130322/38af95c7/attachment.html>

On Mon, Oct 22, 2012 at 3:38 AM, Jonas Paulsson <jonas.paulsson at ericsson.com> wrote: > Hi, > > > > I tried transforming code that loads an immediate into a virtual register, > and then uses that virtual register in various ways, into code that uses > immediate operands instead. I suspect a concrete example might be helpful in demonstrating the specific issue. >

Hi, I tried transforming code that loads an immediate into a virtual register, and then uses that virtual register in various ways, into code that uses immediate operands instead. To my surprise, this made the register allocator produce worse code in many cases. It seems that it is splitting live intervals and spilling more. In some cases the code was better. I wonder how this could be?