[clang] [OpenCL] Add clang internal extension __cl_clang_non_kernel_scope_local_memory (PR #176726)

[Matt Arsenault via cfe-commits]

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+// RUN: %clang_cc1 %s -triple spir64 -disable-llvm-passes -emit-llvm -o - | FileCheck %s
+
+#pragma OPENCL EXTENSION __cl_clang_non_kernel_scope_local_memory : enable
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arsenm wrote:

Maybe "function_scope" or "program_scope"?

https://github.com/llvm/llvm-project/pull/176726