[clang] [Clang][OpenCL] Wrap image functions with the macro (PR #129171)

[Victor Mustya via cfe-commits]

https://github.com/vmustya updated https://github.com/llvm/llvm-project/pull/129171

>From 98ae8631af5d672fc7a86c19f2b84c2efb6ceea0 Mon Sep 17 00:00:00 2001
From: Victor Mustya <victor.mustya at intel.com>
Date: Thu, 27 Feb 2025 17:28:36 -0800
Subject: [PATCH 1/2] [Clang][OpenCL] Wrap image functions with the macro

According to the OpenCL C 3.0 spec, the image functions are optional.
If they are supported, the `__opencl_c_images` macro is defined. This
patch wraps the image functions with the macro. Without the wrapping,
the frontend emit errors, when a user tries to disable the images
support.
---
 clang/lib/Headers/opencl-c.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/clang/lib/Headers/opencl-c.h b/clang/lib/Headers/opencl-c.h
index 20719b74b6b8d..d77cf3c7b2faa 100644
--- a/clang/lib/Headers/opencl-c.h
+++ b/clang/lib/Headers/opencl-c.h
@@ -15082,6 +15082,7 @@ half16 __ovld __cnfn shuffle2(half16, half16, ushort16);
 #pragma OPENCL EXTENSION cl_khr_gl_msaa_sharing : enable
 #endif //cl_khr_gl_msaa_sharing
 
+#if defined(__opencl_c_images)
 /**
  * Use the coordinate (coord.xy) to do an element lookup in
  * the 2D image object specified by image.
@@ -16143,6 +16144,8 @@ int __ovld __cnfn get_image_num_samples(read_write image2d_array_msaa_depth_t);
 #endif //defined(__opencl_c_read_write_images)
 #endif
 
+#endif // defined(__opencl_c_images)
+
 // OpenCL v2.0 s6.13.15 - Work-group Functions
 
 #if defined(__opencl_c_work_group_collective_functions)

>From 1145dc35c481875e3994f9367070f564606db464 Mon Sep 17 00:00:00 2001
From: Victor Mustya <victor.mustya at intel.com>
Date: Thu, 27 Feb 2025 18:47:18 -0800
Subject: [PATCH 2/2] Enable images for OpenCL C 1.2

---
 clang/lib/Headers/opencl-c-base.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/clang/lib/Headers/opencl-c-base.h b/clang/lib/Headers/opencl-c-base.h
index b6bcf32c09c08..1c66342f82808 100644
--- a/clang/lib/Headers/opencl-c-base.h
+++ b/clang/lib/Headers/opencl-c-base.h
@@ -55,6 +55,10 @@
 #endif // defined(__SPIR__) || defined(__SPIRV__)
 #endif // (defined(__OPENCL_CPP_VERSION__) || __OPENCL_C_VERSION__ >= 200)
 
+#if (__OPENCL_C_VERSION__ == 120)
+#define __opencl_c_images 1
+#endif // (__OPENCL_C_VERSION__ == 120)
+
 // Define feature macros for OpenCL C 2.0
 #if (__OPENCL_CPP_VERSION__ == 100 || __OPENCL_C_VERSION__ == 200)
 #define __opencl_c_pipes 1