[llvm-bugs] [Bug 47919] New: image2d_depth_t shouldn't be available in OpenCL 1.1

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47919

            Bug ID: 47919
           Summary: image2d_depth_t shouldn't be available in OpenCL 1.1
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: OpenCL
          Assignee: unassignedclangbugs at nondot.org
          Reporter: marco.antognini at arm.com
                CC: anastasia.stulova at arm.com, llvm-bugs at lists.llvm.org

When compiling the following for OpenCL 1.1 Clang doesn't reject the usage of
image2d_depth_t.

float bar(read_only image2d_depth_t image, sampler_t sampler, int2 coord) {
    return read_imagef(image, sampler, coord);
}

https://godbolt.org/z/MsjKjr

The image2d_depth_t type
 - is defined in extension cl_khr_depth_images for OpenCL 1.2 (and the
extension is disabled by default), and
 - is a core feature in OpenCL 2.0 and later.

Interestingly, Clang accepts this program when using -fdeclare-opencl-builtins.
It is rejected when using `opencl-c.h`, but for another (valid) reason: the
overload of read_imagef using this image type is not available.

Somewhat related to Bug 47882.

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