[clang] [Clang] Fix __cpuidex conflict with other offloading targets (PR #157741)

[Nick Sarnie via cfe-commits]

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@@ -348,7 +348,7 @@ static __inline int __get_cpuid_count (unsigned int __leaf,
 // In some cases, offloading will set the host as the aux triple and define the
 // builtin. Given __has_builtin does not detect builtins on aux triples, we need
 // to explicitly check for some offloading cases.
-#ifndef __NVPTX__
+#if !defined(__NVPTX__) && !defined(__AMDGPU__) && !defined(__SPIRV__)
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sarnex wrote:

Another option is to add a `TARGET_OFFLOADING` macro or something and check that, let me know what you prefer.

https://github.com/llvm/llvm-project/pull/157741