[cfe-dev] Enabling "cl_khr_fp64" in order to visit OpenCL code with doubles

[Jorge Fernández Fabeiro]

Sorry, I forgot to tell you the Clang and LLVM revisions I'm using:

Clang: r130668
LLVM: r130661

I'm using them because they were the latest ones when I started with my
project in July 2011.

Thanks so much again!

El 13 de marzo de 2012 13:28, Jorge Fernández Fabeiro <
fabeirojorge at gmail.com> escribió:

> Hi!
>
> 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).
>
> 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".
>
> So, is there any method or flag in the classes of the libraries in order
> to enable this extension?
>
> Thanks so much in advance,
>
> Jorge.
>
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