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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Jorge,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">As it defined by the OpenCL spec, one should use:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:blue">#pragma</span><span style="font-size:10.0pt;font-family:"Courier New""> OPENCL EXTENSION cl_khr_fp64 : enable<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">in order to enable this OpenCL extension. This pragma works fine in Clang.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img width="420" height="116" id="Picture_x0020_1" src="cid:image001.png@01CD0127.9F657070" alt="email_signature_guy_new2"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> cfe-dev-bounces@cs.uiuc.edu [mailto:cfe-dev-bounces@cs.uiuc.edu]
<b>On Behalf Of </b>Jorge Fern?ndez Fabeiro<br>
<b>Sent:</b> Tuesday, March 13, 2012 14:32<br>
<b>To:</b> Lista de Correo Clang Developers<br>
<b>Subject:</b> Re: [cfe-dev] Enabling "cl_khr_fp64" in order to visit OpenCL code with doubles<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sorry, I forgot to tell you the Clang and LLVM revisions I'm using:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Clang: r130668 <o:p></o:p></p>
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<p class="MsoNormal">LLVM: r130661<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm using them because they were the latest ones when I started with my project in July 2011.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Thanks so much again!<o:p></o:p></p>
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<p class="MsoNormal">El 13 de marzo de 2012 13:28, Jorge Fernández Fabeiro <<a href="mailto:fabeirojorge@gmail.com" target="_blank">fabeirojorge@gmail.com</a>> escribió:<o:p></o:p></p>
<p class="MsoNormal">Hi!<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm working in a project about source-to-source code transformations and I've just programmed a tool using Clang libraries (it's a program I've written in C++, it doesn't use Clang command-line tools at all) that visits the code of some
given "for" loops and apply some optimization transformations (now, only loop unrolling). <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Till today I've been testing the tool with OpenCL kernels that operate with integers or floats, but now I'm trying to process a kernel that operates with doubles, and, unfortunately the tool crashed. First, I tried to dump the CompoundStmt
that represents the body of a visited "for" loop, and I discovered that it's empty when the visited code contains any reference to double variables. After this shocking problem, I replaced the "double" variables with "float" ones and all went smooth. Considering
that workaround, I also tried to emit the LLVM representation of my OpenCL kernel with doubles, and clang gave me this error: "error: use of type 'double' requires cl_khr_fp64 extension to be enabled".<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">So, is there any method or flag in the classes of the libraries in order to enable this extension?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks so much in advance,<o:p></o:p></p>
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<p class="MsoNormal">Jorge.<o:p></o:p></p>
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